How to Re-Install OS X with Internet Recovery on a Mac

Dec 14, 2014 - 114 Comments

Reinstall OS X on a Mac with Internet Recovery

In some rare situations, reinstalling OS X on a Mac may be required. This is made fairly easy as all modern Macs include the OS X Internet Recovery feature, which lets you reinstall OS X through a netboot type of mode that is accessed from the internet rather than a local drive. This is helpful in the event you need to reinstall Mac OS X whether for fun, because something has gone truly haywire, or because you need to replace the system software for whatever other reason.

To be clear, we’re going to focus on Internet Recovery here, but there are actually two modes of system recovery; one of which is based on a local Recovery disk partition, and the other which is called Internet Recovery, the latter being triggered if the Mac does not have a Recovery partition found or if booted directly into as shown in this walkthrough. Both of the recovery modes let you re-install OS X, but the version of OS X that is installed onto the Mac will be different depending on the type of recovery mode used. Specifically, the Recovery HD partition will re-install the most current version of OS X that is currently installed on the Mac, whereas Internet Recover will re-install the version of OS X that originally came with the Mac. That difference in how the two features works means you could theoretically use Internet Recovery to downgrade OS X to the version that shipped with the Mac, though there are better ways to do that if you have a Time Machine backup from the prior OS X release handy.

Note: Re-installing OS X is typically only necessary when something is seriously wrong with the Mac system software and the computer is not functioning as it should. Do not attempt to use recovery mode for reinstalling unless you have made a thorough backup of your important files beforehand, doing so without a backup may result in irreversible file loss. You can always start a backup with Time Machine before if you need to. This guide is simply going to cover how to start a reinstallation of OS X with Recovery mode, and not the other options available when booted into recovery.

ReInstall OS X on a Mac Using Internet Recovery

Internet Recovery requires internet access, that may be slightly obvious but it’s worth mentioning because if the Mac is unable to connect to a network then it will not be able to download the operating system. Whenever possible, you should back up the Mac with Time Machine before attempting this.

You can start the internet recovery reinstall process from either a shutdown Mac, or by rebooting the Mac. This process will be the same on any new Mac, be it an iMac, MacBook Pro, MacBook Air, etc:

  1. Immediately after hearing the Mac boot chime, hold down Command+Option+R – if you see the Apple logo you waited too long and need to reboot and try again*
  2. OPTIONAL: You may or may not see an option to join a wi-fi network, this depends on whether the Mac can access any saved networks from OS X or not
  3. When you see a spinning globe icon, Internet Recovery mode has been entered with a message saying it can take a while, a progress bar appears as the recovery functions are downloaded
  4. Starting OS X Internet Recovery Mode on a Mac to reinstall system software

  5. When finished downloading, you’ll see the familiar “OS X Utilities” screen, choose “Reinstall OS X” to begin the re-installation process of the Mac operating system
  6. Install OS X from Internet Recovery

  7. Select the destination and complete the re-installation (or installation) of OS X as usual

You’ll notice the version of OS X that can be reinstalled this way is shown in the icon or listed under the “Reinstall OS X” option, and that version will match whatever version of OS X came preinstalled on the Mac. For example, if the Mac shipped with OS X Mavericks but is now running OS X Yosemite, then OS X Mavericks would be the version that reinstalls through the Internet Recovery reinstall process.

For Macs that do not currently have an operating system found or installed, the option will show as “Install OS X” rather than “Reinstall OS X”.

Installing and re-installing OS X through Internet Recovery is pretty easy, but do be aware that because everything is coming from Apple servers, it can take quite a while as the system restore features are downloaded locally, and then the version of OS X to install are also downloaded locally as well.

When OS X has finished installing on the Mac, it will boot into a fresh install of OS X system software.

Do note that if you are reinstalling OS X to try and repair some greatly messed up operating system install, you’d likely be better off performing a true clean install of the system software by formatting the drive and then installing OS X onto it (or another drive). If interested in going that route, you can learn about clean installing OS X Yosemite, or clean installing OS X Mavericks, both of which are best performed from a separate boot drive or bootable USB installer.

* You can also use Command+R to boot into Recovery mode, older Mac models that do not support Internet Recovery will need to do that. Note that newer Macs that have both options can choose either, or they can can skip the recovery drive and go directly into Internet Recovery by using the Command+Option+R boot shortcut.


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Posted by: Paul Horowitz in Mac OS, Tips & Tricks, Troubleshooting


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  1. Peter Payne says:

    I verified that you need to use a wired keyboard for recovery mode, or at least Satechi Bluetooth keyboards will not work for booting in this mode. Kind of disgusted that I have to keep a crappy wired Apple keyboard from 2011 near my modern 2020 iMac because Apple can’t engineer their products properly.

  2. Sven O Dahlgren says:

    I got this to and no solution for it. New harddrive and it hav try to install mac os x lion?

  3. Ari says:

    I am attempting to reinstall the original OS on my new-to-me iMac via the internet. I cannot get into recovery mode while booting with the comd+R, or comd+opt+R key strokes. Can I do recovery mode from the command line of the terminal? If so, what codes do I use to get in. Thx in advance for your help.

  4. Hey says:

    You can try option + command + R (in that order) idk why but when I pressed Command + option + R didn’t work

  5. Trev says:

    I’ve tried holding Command+Option+R immediately after the chime and it still brings me to the Apple logo, help??

  6. Marlon says:

    Just SSD’d a Mac mini
    Boot into recovery … didn’t take too long?Progress bar jumped up to about 45 minutes at one stage but in reality took maybe 10-15 of elapsed time.
    Formated drive
    Downloading OSX 11
    Very smooth process.
    I remember installing software of half a dozen 5 1/4″ floppy drives so this makes me feel like I’m Star Wars ….

  7. Remi says:

    I connected my wifi and the globe is just rolling and it displays the name of the wifi connected…. the globe has been rolling over 16hours now…. and it didn’t display content like you posted that STARTING INTERNET INTERNET RECOVERY…. PLEASE HAS ANYONE EXPERIENCE THIS OR ITS NORMAL

    • marlon says:

      I just did this recovery during installing a new hard drive and it didn’t ask me to select a wifi network just started downloading?

    • owillard says:

      did you ever find a solution to this? the same thing is happening to me

  8. Lawrence says:

    It seems the status bar after login is solid but still on the same screen

  9. Lawrence says:

    MacBook Pro 2012:
    Just did internet recovery for High Sierra…username login came up, entered password, now grey screen with logo appears, “installation in progress. Calculating time renaming…”

  10. Jenn says:

    Clarification: I bought more memory because the restore failed. Thank you for your help.

  11. Jenn says:

    My IMac mid 2011 wouldn’t boot up. Kept recycling to a message to restart. After restarting holding down p r option command and shift ( very tricky) I selected disk utility and after it initially not recognizing my hard disk and rebooting in the same way I could see the hd disk and it looked full. I restored from a time machine back up. It booted up and although slow worked 1 time and then done. I was able to erase my HD and then tried a full restore. So I bought more memory and loaded. NOw I still can’t boot up To even check if the memory is seeded correctly. Trying every type of reboot I can’t even get to my disk utility screen to select a restore. Please help

  12. Jason says:

    After Internet Recovery loads and progress bar completes, it shows apple logo then progress bar. BAck to white screen again.

  13. Lucas says:

    I have a late 2011 MacBook Pro which came with OS X Lion.I have passed the step of downloading OS X, but right as the download of “additional components’ finishes, Another one restarts. I am wondering if this is because their are multiple additional components.

    Please Help.

  14. fher says:

    after I enter my password a window came out saying “This item is temporarily unavailable” try again later , any idea why?

  15. Joe says:

    When I get to installing it says the ‘disc is locked’. There is no option I can find to unlock. Does anyone have the answer?


  16. emozo says:

    same here, “This item is temporarily unavailable “ when logging into Apple ID. WTF is this?

  17. Patrick says:

    I replaced my mac pro hard drive and I tried re-installing Mac OS X lion. It prompt me to log Apple ID account and after I got in, this is the message I got “This item is temporarily unavailable “, Try again later.
    Any comment I can get this resolved?

  18. Hany says:

    During the re-installation of the OS X with internet recovery, I’ve got this message “ -21 06F”. Any help please??

  19. Nathaniel says:

    Hey! I tried the internet recovery (for a clean install) on my Macbook Pro. What happens when I click install Mac OS Sierra, and I agree to continue with the installation, a popup appears with an error about unauthorized certificates or something.. help please.

  20. cad says:

    hi there – not read yet an answer to the problem around trying to install os x mountain lion in recovery mode- as when i have agreed to the terms, the next window says
    ‘select the disc where you want to install’
    but there is NOTHING to select

    please can anyone help with this!??

    thank you so much

    • Kaoboe says:

      Typically if there is no drive to select, then there is either no drive installed in the Mac, or the disk is failing.

    • DB says:

      Same problem. Had to Erase Macintosh HD first (which caused problem in the first place). Verify disk to assure the errors are fixed, then go back to Reinstall OS X and the disk magically appeared.

  21. Thaking says:

    If you can’t install with internet connectoren them just use cmd+r it Will then boot from your recovery partition.

  22. Joe says:

    I’m about to attempt to do this type of recovery but here is my concern that isn’t listed in the instructions. My MacBood Pro is a late 2008 model. Does that fall under “older Macs”? It would be helpful if they listed what they consider “older Macs”. Any help with this question would greatly be appreciated.

    • iNT says:

      Depending on what version of Mac OS X is on the computer right now, you can try to use Recovery Mode (Command + R on boot) to reinstall. A better option may be to use a USB installer drive for El Capitan or whatever version you are hoping to reinstall.

      An 8 year old computer is generally ‘older’, but it depends on what OS X is on it right now as well.

  23. young says:

    I can get up to screen where it says ‘select the disk where you want to install OS X. Well … the install button is greyed out and i am not given any options of a disk to select. I was able to download mavericks via wifi.

    Also, in disk utility, i cant erase or repair anything, as just about all options there are greyed out

  24. jo says:

    After reading many blogs and many hours of troubleshooting, like always, comes down to the simplest thing.

    When doing this OS X reinstall, you have to be connected via wire to the router or modem directly. You will have issues via WIFI….

    • jo says:

      Oh and this was recommended after an hour with Apple Care, very nice technician and very helpful as always, not sure why everyone else talks bad about Apple Care, they are always helpful to any issues i had.

    • Paul says:

      I have reinstalled OS X with wi-fi connections several times, it should work fine if your wi-fi router works with the Mac. No issues. Ethernet connection is good too if your Mac has a port, most new ones don’t unfortunately.

  25. Victor says:


    Got a White macbook late from mid-2011. Came with snow leopard. Had to change hard disk.
    -Using Command+R to install OS-X doen’t work.
    -It proposes to “Reinstall OS-X Lion”.
    -When I click on it, it says “To dowload and restore Mac OS X, your computer’s eligibility will be verified with Apple”.
    -When I click “Continue” it says “An error occurred while preparing the installation. Try running this application again.”
    -I have tried several times and it’s not working.

    Can someone help? Thank you!

    • Eric says:

      I know, this is an old comment, but I finally downgraded back to El Capitan last night by using the Internet Recovery route. Wi-fi didn’t work, so I connected an ethernet cable from my MacBook Pro (mid-2012) to the router, and I got connection. It gave me Mountain Lion, and then I was able to upgrade to El Capitan. I should have never upgraded to Sierra-High Sierra-Catalina in the first place, since those upgrades rendered many of my favorite apps useless.

      By using Internet Recovery, no need to use Time Machine or flash card to upgrade. You will still need to save everything from you HD beforehand, though. I used a 3 TB external HD

  26. John says:

    So has ANYONE one this thread figured out the problem?

    I restart my computer using all the option/command/R stuff but get a spinning globe that never connects to my internet.
    I read somewhere else that it could be my internet and that I should try a restaurant or internet cafe? I really don’t want to spend $75 for apple to do it.

  27. Nick says:

    I formatted and quit at that wrong time, I used opt+com+r and get the globe. after that the apple, then nothing.


  28. Mijkol says:

    I have tried to reboot using recovery mode but still getting a white screen – Any ideas?

  29. Cyntia says:

    Hello Mac People–my MacbookPro been going great since 2009–until yesterday when I tried to upgrade to ElCapitan-(slow internet, I finally stoppped the download after about 15 hrs) Now the right shift key and also the return keys stopped working– (they don’t light up in keyboard viewer tho all others do)
    Please: anyone know how to fix ? (been doing Timemachine backups to an external harddrive all along). Thanks a lot–appreciate so much…

  30. Aswin says:

    I ereased my new MBP retina 2015 and it only boots to internet recovery and I have my USB disk bootable with yosemite .

    If it boots to my usn I would intsall it and I tried holding C to go to usb disk .Help me soon

  31. Afikile says:

    Does anyone know why I cannot install from disk? I boot and press C, moves to Apple Logo and get the 3 beeps. Have changed Ram and the only way that leads me somewhere is the alt,cmd p option and I dont get the 3 annoying beeps.

  32. Afikile says:

    After 5 hours of waiting, got back to the installation telling me I had 132 hours to go. Well, I cancelled it, will try tomorrow on a faster line. I hope it works that way

  33. Greg says:

    Using Internet Recovery I could tell it went through the download. After that I got the centered apple logo, then back to blank white-grey screen.

    The reason I went with this recovery option is that I cannot go into Command+R to get the OS X Utilities. Ugh. Oddly, 3 hours ago I was able to. Now every process I have been reading about and try gets me back to the white screen.

    Any thoughts?

    • Greg says:

      Edit: When I earlier was able to access utility, no disk errors were found. I also tried the “fsck -fy” option in terminal mode and seems like there were no errors. So odd….

  34. Noah says:

    I got a mac Book Pro with os x maverick and i erased the files at the utility without backup of the apps.
    am trying to reinstalled the maverick but i keep receive a message that is not available any time i want to reinstalled after logged in to apple account.
    after while i did a bootable usb on a pc with a mac os x yosemite but my system not recognise the bootable usb.
    Please how do i make it work again.

  35. Sudhir says:


    I erased my HD drive. After that installed mac os. After some time its giving error 4403f. Tried on my office WiFi.

    Please help.

  36. Josh says:

    Hi, so I wiped my Mac hd due to some problems with performance etc. after wiping the hdd I clicked the reinstall OS X and got the message saying cannot locate your computers information. This meant that I couldn’t reinstall the OS X. I turned the Mac off and on again and tried to go back to the recovery menu using command+R but it only goes it internet recovery mode. From there I try the internet recovery and keep getting error code 4403f. Now I’ve read that it’s related to the ISP or router firewall, but I’ve not found a way to solve this problem. Therefore I’m stuck with the situation wher I can’t reinstall or recover the OS X from the Internet and I can’t get back to the original recovery menu from before.

    Any idea what to do? I will if necessary take it to a licenced repair shop but I’ve read it could cost anywhere from 50-150 USD which is a bit much to just reinstall the OS X.

    Any help would be much appreciated. Thanks

  37. Emily says:

    Would this work on my iMac A1312 owned since September 2010?? Have basically done a factory reset, just need to reinstall OS.

    Thanks in advance.

  38. No Name says:

    I’ve wiped my computer before, but I don’t recall these menus. I have erased my Macintosh HD hard drive, and don’t know the next steps.

    I am running a mid-2011 iMac with 16GB of RAM and a stable internet connection.

    Please help.

    • Brian says:

      Good if your internet is stable, turn it on while holding the command and R key for internet recovery mode. This will take you to the OS utilities where you will download the os from your mac directly from the apple servers.

      Good luck.

  39. Dominique says:

    I’ve gotten thru all the step and when it ask me to select a disk to install Mac OS X Lion to, there nothing in the field box to select :/ any ideas?

  40. Stefan says:

    what if i can’t get onto internet recovery??

    i have wireless connection available but it doesn’t want to go into the actual internet recovery.

    I went and reset my MacBook Air, and then i went to access the internet recovery bit, the bar started loading up, and about 3 quarters of the way it stopped and said 200F

    as i said i have full internet access, it just refuses to download the OS X from the internet.

    any help would be greatly appreciated please

  41. Len Pritchard says:

    I’m trying to re-install OS X on a mac mini currently running Yosemite 10.10.3 from the built in recovery partition. I have erased HD, de-authorised from iTunes and signed out of iCloud in readiness to sell the machine – however it is only re-installing Mountain Lion – which is the version of OS X that came when purchased. Any idea why?

  42. Adam24 says:

    Charlie23 im having the same exact issue. Any luck?

  43. hussain says:

    I format my os x and create new partitions throw Windows 7 no any sound in win7 . now I want to install os x Yosemite again from where i can

  44. Ineedhelp says:

    When trying to reinstall OS or basicly do anything else, my Mac cannot find a disc. I have nowhere to install it to.

  45. Charlie23 says:

    I’m resurrecting a MacBook pro that had a failed HDD but no OS disc etc. Replaced drive and ran Internet Recovery, task bar showed that took about 4 mins (lan connection), but after, the Mac screen showed Apple logo for a few moments, the spinning dots for maybe 5 secs, then goes and sits on a blank/lit screen without any menu option.
    Any suggestions as it’s been sat like that for an hour at least. I don’t know if it’s running anything in the background or just hung.
    Advice appreciated.

  46. MOSES says:

    i have been trying to re install the OS X or any Apple OS but seems impossible on my mac book pro because the maybe the hard disk is been removed but left 111GB of hard disk for me now i think i can have the solution to this please help

    • nope says:

      You can’t be serious, of course you can’t install OS X without a hard disk. Could a car run without an engine? It would do nothing. Install a hard drive, how are you supposed to re-install OS X without a hard drive? Where is it going to go? That’s like trying to walk in the air. Get it together.

      • Lou says:

        Be Kind.. it seems there is a communication issue here.. he states that “MAYBE it was removed – but then states it left 111 gb left” (meaning he doesn’t really know) if i were to analyze this.. it seems he just needs to run disk util and maybe repartition. at least go to disk util and see see exactly what HD he has..

      • NoFanboy says:

        Or maybe he doesn’t understand computers. What are you, 14? Don’t be a jerk.

    • Lou says:

      Moses. connect machine to internet and restart holding command+R – this will (should) start in system recovery which will give you Disk util and “Reinstall OS” option – Note that this will install the OS that the Recovery part was created with.

  47. Amos says:

    “For example, if the Mac shipped with OS X Mavericks but is now running OS X Yosemite,”

    That’s bs. I went through Internet Recovery on my mid-2010 MBP, which came shipped with SL 10.6.3. After updating Lion from 10.7.4 to 10.7.5, I had to REINSTALL the entire OS, when the machine refused to boot back into the desktop. But Internet Recovery is insisting on installing the God-awful Yosemite… not the Snow Leopard, that I want and that it came with!

    • data says:

      Mac OS X Snow Leopard did not include or support Internet Recovery, so it would be impossible to restore an operating system to the Mac which never included the feature. In those situations, the most recent version of OS X available will be recommended by Apple to install.

      Personally, and you can say this is anecdotal, whatever, but I would not recommend installing OS X Yosemite in it’s current form on a 2010 model year Mac, it really belongs on Macs from 2014 and newer hardware, it is not well optimized to run on systems with lesser resources. I say this with experience from extensive testing on many Macs of a variety of capabilities, and I’m at the point where if the Mac does not ship with Yosemite installed, I would not install it. OS X Mavericks is quite good, and is at least optimized for most hardware. On a brand new Mac, OS X Yosemite runs quite well, however.

      Fortunately, most 2010 Macs came with physical reinstall DVD volumes of Mac OS X Snow Leopard, so you should be good to go with that.

  48. jd andre says:

    I am receiving error code 1007F when I try Internet recovery, is there anyway I can get past the startup issue where I’m getting the flashing question mark in a folder, without using Internet recovery? What goes in box with WiFi or antenna next to it? And what goes in box with lock? What do I click on check or info on this shift and r right at startup…????


  49. Shelby says:

    “Select the disk where you want to install OS X”

    Do I have to put in a disk to reinstall mountain lion or should something come up that I can choose from?

  50. Tom says:

    On 5k IMac

  51. Tom says:

    Is it possible to install lion or slepard server as dual boot

  52. Troublef says:

    What if i dont find a disk When im about to choose which disk i want to reinstall

  53. M says:

    I tried installing and when I selected Macintosh HD it said “the disk is locked” and would not let me proceed?

  54. Shayna says:

    I have followed these instructions and successfully get to the point where I can reinstall Lion. However, while installing, the progress bar will get down to “About 1 second remaining” and then jump back to anywhere from 45 to 32 minutes remaining. This process has repeated itself several times. Any ideas what to do from here? Thank you.

  55. Alex says:

    I am receiving error code 1007F when I try Internet recovery, is there anyway I can get past the startup issue where I’m getting the flashing question mark in a folder, without using Internet recovery?

  56. SM says:

    i have done this, although once i try to reinstall OS X is says that it is not availiable and to try again another time.. what do i do then?

  57. JC says:

    I followed the steps in this article and sure enough I got to the point where I had the option to reinstall and the OS offered was Mavericks (the one which came with the MacBook Pro. This is what I wanted: Downgrade from Yosemite to Mavericks). Now when I click it says “You cannot install this on a newer operating system”. However, since I have a second partition for my file storage separate from the system partition I clicked on that and it is now installing.

    Question. Once if it installed can I just erase the partition where I have Yosemite and get rid of it altogether so I just use Mavericks or it would be better to keep both and dual boot?


  58. MB says:

    Hi, I messed up when attempting to revert from Yosemite to Mountain Lion via internet recovery.

    Instead of re-formatting (if that is the right terminology) my macAir, I accidentally selected my external time machine hard drive (ouch).

    On the MacAir I now have the following details listed under my Disk Utility:

    Macintosh HD
    -Macintosh HD

    disk 1
    -Mac OS X Base System

    How do I proceed?
    a) Do I add a new partition? (a 2nd one)? And afterwards delete the 1st partition?

    At present that is one of the few things I can click on.
    At present I don’t seem to be able to delete disk1 or -Mac OSX Base System

    Any help would be greatly appreciated!

    • KD says:

      Disk 1 cannot be deleted because it is d place where os x utilities is installed
      Do nothing on this and just close the window. Now click on reinstall mac (or install mac)os x. Let it go

  59. Lucy says:

    Hi, I recently bought a Mac Book Air as My Mac Book Pro failed on me and when you turned it on it went to a file on a grey screen flashing with a question mark on it? I held down Comand R and it went to internet recovery mode that worked fine after a while it went to some OS X Unilitys and i clicked Install OS X Mountin Lion as it was originally on the computer. It downloaded and then went to OS X Mountain Lion downloading additional components. You computer will restart Automatically and has a bar for loading progress mine is at the end ( the whole bar is full) but its stuck on that and isn’t doing anything. I don’t really want to start all over again as it took me 17 hours

  60. Viku says:

    I have got macbook pro early 2011 model. Initially it came with Mac OS X Lion. Later on I upgraded it to Mavericks.
    Recently I thought of upgrading it to Yosemite which I did. On successful installation I realised that It is extremely slow and
    found out that it is encrypting my whole hard disk. I left it for hours and hours but it looked like it stuck on that process.
    And also did not allow me to stop the process. I turned off my macbook using power button kind of hard stop thing. When I tried to
    turn it on, it stuck on safe mode and nothing was happening. I could not log back in and I tried all the diifferent methods like PRAM reset,
    safe mode, disk utility tool to repair the disk but nothing seemed to work. Luckily I had backup in Time machine from last
    year which restored my system back to Mavericks. I started using it and it was working fine. Yesterday while closing my
    system I used Power button and did that forced shut down kind of thing again and since then it is not turning back on properly.
    it keeps going to safe mode. From safe mode I tried to restart the system but since then it stuck on Grey Barred Circle thing.

    I decided to use Internet recovery method when all other methods failed including safe mode, pram reset, single user command.
    It looked like I will be able to restore my mac using my back up on time machine in external hard disk but it stuck on 85%
    twice. And now when I am trying to re-install the orignal version of Lion OS X which came with my macbook using internet recovery mode
    it is giving me an error, “you cant upgrade this version because newer version is installed”. Please help me. thanks

  61. Sam says:

    I got to the reinstall Os X part of this and it keeps rejecting my password even though I know it’s right. Any reason why this is happening?

  62. June says:

    After #3 above, I have a grey screen, and it’s sitting at wifi sign-on, where my username is showing and the dots for where I put in password and hit the check mark, so now after hour see spinning gear to right of password box and wifi bars are full–does this mean it’s downloading or installing? Or has it not taken my password? I see no horizontal progress bar, only spinning gear there.
    [Writing this 1-16-15]

  63. Tonio says:


    After select wifi network i have screen and error -2102F

    I don’t understand why.

    It’s on MBA 2012.

    Anybody have idea ?

  64. Toomas says:

    Trying to follow the steps listed in order to downgrade from Yosemite to Mavericks went well untill the error – the system refused to install Mavericks to my HD where a newer version of Mac OS X already resides… :(

    • pijtm says:

      This is not a walkthrough on downgrading mac, this is a walkthrough on using Internet Recovery to reinstall OS X that came with the computer.

  65. Andrew Watts says:

    wow, a great article and easy to use. Would this style work in this case?
    if someone upgraded Mac machine in terms of RAM and few apps to ease the work then the Re-installed OS X would come bare or along with the apps?

  66. Saint Stryfe (@saintstryfe) says:

    One day at work I found a Macbook Air in a recycling box. My boss let me keep it, if I made sure I wiped it clean. So I arrogantly booted it up, showed it to him, and did internet recovery. He said “if microsoft did this our job would be so much easier…” he’s right.

  67. arob says:

    I have used recovery partition several times, and it is relatively slow (on WiFi), but infinitely useful way to fix serious performance issues.

    What is rarely mentioned in these How-tos is a somewhat unique thing with OS X versus Windows. Every time I have re-installed Windows, I have had hours of work to re-install apps, settings and documents (maybe it is better with Vista/7… but I gave up on MS long before these).

    With OS X, reinstall does not reformat the drive, rather it leaves /Users/… and /Applications/… untouched. Therefore, once the operation is complete, you pick up where you left off, all apps and settings and docs are right where you left them and no Restore from backup is needed.

  68. Max says:

    Good article.

    Hope I never have to recover from an OS X failure, but it’s good to know this beforehand.

    Funny, “This may take a while.” Reminds me of Morpheus telling Neo, “This will feel a little weird.”

  69. Wharf Xanadu says:

    “Starting Internet recovery. This may take a while”

    I get a kick out of the second part, accurate.

    • Fen says:

      I agree! It showed the globe and says “this will take a while”, then it goes into a blank screen with the apple in the middle, 3 hours passed by now nothing changes!

      • jack nelson says:

        If command+r does not work boot and hold alt and select your wifi network

        • Paul says:

          Hi Jack, Ive been having this issue where first of all if I just boot the imac, it just keeps restarting over and over. If I try any of the startup options such as command+option+R it goes into internet recovery progress bar then goes back into the apple logo progress bar then stays on the grey/white screen. Like you said here, i just held alt and it allowed me to choose my network then I hit “recovery” and it did the same thing….any ideas as to what I can try next? This seems to happen no matter what startup commands I try. I dont care if everything on the computer gets deleted I just want to get this thing working again.

          Thanks in advance and hope to hear from you soon.

      • Chris says:

        Hey, mine’s doing the exact same thing. Did you find a solution to this? Stressing out!

  70. Tom says:

    I prefer using a USB key to reinstall Mac OS X (basically like the clean install you described), but Internet Recovery is so easy if you have broadband that it’s a great option.

    Very glad most Macs have this these days, I believe it’s any Mac that shipped after mid-2011 that includes the Internet based Install OS X ability, I used it on a MacBook Air recently just because it’s simple

    For anyone wondering, you can also use Internet Recovery > Utilities > Disk Utility to format the destination drive and do a full clean install, or simply reinstall JUST the operating system of OS X. It’s a workable way to downgrade from Yosemite to Mavericks or Mountain Lion if the Mac came with it… but yes indeed backup first because I have seen it go wrong before!

    • Fade says:

      Reinstalling OS X this way is fine, so is installing OS X this way. Downgrading with Internet Recovery is not a good idea at all.

    • Brian says:

      Mine has taken so long to get through the internet recover mode to reach the OS utilities and I think it will take longer to download the OS from the internet. I would like to know how I can install from the OS setup that i have copied to my usb drive. internet here is so terrible and I would not like to wait any longer. Please help

    • jack nelson says:

      If command+r does not work boot and hold alt(Option) and select your wifi network and if that does not work go on to a working mac and download this tool and plugin a 8 gb usb format it to mac os Extended journaled by useing disk ulitey then run the tool chouse the drive and let it do its thing

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