Multi-Mac households can buy OS X Mountain Lion once for $19.99 and use that single purchase to install and upgrade all of their other personal authorized Macs.

This is allowed by Apple’s generous Mac App Store licensing agreement that began with Lion, and though most people don’t bother to read the fine print, here’s the section of the OS X Mountain Lion 10.8 License Agreement that pertains to the matter:

“(i) to download, install, use, and run for personal, non-commercial use, one (1) copy of the Apple Software directly on each Apple-branded computer running OS X Lion or OS X Snow Leopard (“Mac computer”) that you own or control.”

Basically that means as long as the Macs share the same Apple ID, you will be able to easily re-download Mountain Lion on another Mac, whether it’s running Lion or Snow Leopard. You can also just copy the Installer over, or manually make a bootable Mountain Lion installer drive and use that to upgrade the other Macs in the household. Here are several approaches to getting the other Macs upgraded:

Method 1) Downloading Mountain Lion on Other Macs

The simplest way to upgrade other Macs is to just download the installer on other Macs. From the other computer(s) you wish to upgrade to Mountain Lion:

• Launch the Mac App Store and be sure you are logged in with the same Apple ID that you originally bought Mountain Lion with
• Click on the “Purchases” icon and locate “OS X Mountain Lion”, then click the “Install” button
• Run the installer as usual to upgrade the Mac

Don’t want to re-download OS X 10.8 from the App Store? You can also just copy the installer to other Macs. Here are two simple ways to do this over a network, the easy way with AirPort and the traditional way with File Sharing. The best time to do this is before upgrading the primary Mac so that you have easy access to the Mountain Lion installer without having to re-download it from the App Store.

Method 2) Transfer the Mountain Lion Installer Over AirDrop

If the Macs you’re upgrading are running Lion, using AirDrop to transfer the installer is by far the easiest solution and it will prevent you from having to download the 10.8 Installer app again from the App Store:

1. From the Mac you are copying the Installer from: open a new Finder window and navigate to /Applications/ and locate the file “Install OS X Mountain Lion.app” then open another Finder window and select “AirDrop” from the sidebar
2. From the Mac(s) you are transferring Mountain Lion installer to: open a new Finder window and choose “AirDrop” from the sidebar
3. Drag and drop “Install OS X Mountain Lion.app” to the destination Mac(s) in AirDrop, and accept the file transfer on the destination Macs
4. When finished copying, upgrade to OS X 10.8 as usual

For Macs without AirDrop support, use traditional File Sharing described next.

Method 3) Copying OS X Mountain Lion Installer to Other Macs via LAN

In order to do this, you’ll need to have downloaded the Mountain Lion installer and not installed it yet, or else you’d have to re-download Mountain Lion. This solution is best for multi-Mac networks and for those looking to upgrade to Snow Leopard

1. On all Macs you wish to copy the Installer to, enable File Sharing by going to  Apple menu > System Preferences > Sharing > check “File Sharing”
2. From the Finder of the Mac with Mountain Lion installer, go to /Applications/ to find the installer “Install OS X Mountain Lion.app”
3. Open a new Finder window and hit Command+K to bring up “Connect to Server”, choose “Browse” and connect to the shared Mac
4. Navigate to the shared Macs /Applications/ folder and copy “Install OS X Mountain Lion.app” to it
5. Repeat as necessary for other personal Macs

Alternative Multi-Mac Upgrade Methods

These are generally for more advanced users since most require the creation of boot disks:

• Copy the installer to a DVD or USB key – this method on it’s own will not be bootable
• Clean install OS X Mountain Lion with a boot disk
• Manually make a bootable Mountain Lion installer drive out of an extra USB drive or DVD
• Use a tool like Lion Disk Maker to create a boot DVD/USB

Did we miss anything? Let us know in the comments. Happy upgrading!

Though most users are best served by the easy upgrade process to OS X Mountain Lion through the Mac App Store, some people want to perform a clean install and start with a blank slate. A clean install means the drive is completely erased and Mac OS X 10.8 is installed fresh, nothing else is on the drive, no apps are installed, and no files are included.

The process described below will format the selected Mac disk and erase everything on it, followed by performing a completely clean and fresh installation of OS X Mountain Lion.

We’d highly recommend backing up your Mac before performing a clean install, even if you have no intention on using it afterwards.

1. If you don’t have it yet, get Mountain Lion from the Mac App Store but do not install it yet (or redownload it if you did install it)
2. Create a bootable install drive for OS X Mountain Lion, make one manually with a USB drive or use the LionDiskMaker tool to automate the process with a USB or DVD
3. With the boot installer drive connected to the Mac, reboot and hold down the Option key
4. Choose the “Mac OS X Installer” startup volume from the boot menu
5. Select “Disk Utility” and choose the hard drive you wish to format, click the “Erase” tab, and then pull down the “Format” menu and select “Mac OS Extended (Journaled)” as the type, name the drive if you wish
6. Click the “Erase” button and let the drive format – this is the point of no return
7. When finished, quit out of Disk Utility and now select the “Install Mac OS X” option from the menu
8. Choose your freshly formatted hard drive and install Mountain Lion

When the Mac reboots you will have a clean installation of Mac OS X 10.8 to work with.

At this point you can either import files and apps from the backup you made, manually copy over backed up files, or just start anew.

Mountain Lion is out! You can upgrade a Mac right out of the App Store, but some people prefer to make a boot disk. If you’re in that group, rather than making a bootable OS X Mountain Lion installer yourself the old fashioned way, you can do it all in a few clicks with the help of a free app called LionDiskMaker.

After you’ve downloaded the OS X Mountain Lion installer from the Mac App Store, launch LionDiskMaker and it will locate the installer app, extract the disk image, and then make the boot disk. It’s about as simple as it gets.

For burning a boot DVD you will need a 4.7GB or larger blank DVD and a SuperDrive. For USB install drives or SD cards the drive needs at least 8GB of space available. LionDiskMaker formats the drive you point it at, remember that when you are picking a disk to make bootable for the installer.

• Get the newest version of LinoDiskMaker free from the developer

Making a boot installer is really helpful if you need to install Mountain Lion on multiple Macs and don’t want to re-download it on each Mac from the App Store, or if you want to perform a clean install. If you don’t need the bootable aspect, you can also just copy the Installer app file from the /Applications/ directory to other Macs and it will work to perform the OS X upgrade too.
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Right alongside the freshly launched OS X Mountain Lion, Apple has released Safari 6 for OS X Lion users. Users can download Safari 6 from Software Update via the  Apple menu.

The Omnibar, which Apple calls the “Smart Search Field”, is the biggest visible change, it combines the URL bar with the Search bar allowing for a much cleaner minimalist user interface that more closely resembles Google Chrome. The Omnibar is worth the update alone in our view, but there are a handful of other nice features that are also great like Offline Reading List, which saves complete web pages for reading later when you don’t have an internet connection, a Do Not Track option for enhanced web privacy, the Password Pane management tool for web logins, Baidu search for Chinese users, and a bunch of fixes and performance enhancements.

If you’re not upgrading to Mountain Lion today, do yourself a favor and at least get Safari 6.

OS X Mountain Lion has been released by Apple. The major update to Mac OS provides over 200 new features, including iMessage support, Reminders, Notification Center, Notes, Game Center, extensive iCloud integration, and much more.

The upgrade costs $19.99 but is available for free to Mac users who bought a Mac within the past month.

• Get Mountain Lion from the Mac App Store Now

Apple’s generous licensing terms allow you to install a single purchase of Mountain Lion on all of your personal Macs. If you don’t want to re-download OS X 10.8 each time on each computer, you can make a Mountain Lion boot installer from any USB drive or DVD.

Be sure to back up each Mac before installing, follow our simple guide on things to do before upgrading if you haven’t done so yet.

Update: Mountain Lion is now available!

No more rumors or speculation, Apple CEO Tim Cook has confirmed that OS X Mountain Lion will launch July 25:

“We’re thrilled with record sales of 17 million iPads in the June quarter,” said Tim Cook, Apple’s CEO. “We’ve also just updated the entire MacBook line, will release Mountain Lion tomorrow and will be launching iOS 6 this Fall. We are also really looking forward to the amazing new products we’ve got in the pipeline.”

That quote comes directly from Apple’s PR library ahead of the Q3 2012 earnings call this afternoon, and also serves to reiterate the release date of iOS 6 later this year, while also teasing for whatever “amazing new products” (new iPhone? iPad mini?) Cook is referring to.

As we mentioned earlier in our recap of things to do before installing Mountain Lion, you’ll want to back up your Mac before installing OS X 10.8 on your Mac.

The release of OS X Mountain Lion is just around the corner (it’s official: July 25), but before jumping into the latest major Mac system update, you’ll want to do a few things. We’ve broken it down to a few simple essentials that are easy to follow:
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Open Wi-Fi networks are everywhere, if you’re stationed in an area with tons of them you’ll probably want to prioritize your own network to be the top wireless network to join so you don’t accidentally end up on someone elses unsecured network. Prioritizing is also a good idea if you use Personal Hotspot in public so you don’t end up on an open public access point.

The simplest way to prevent a Mac from joining one network over another is to set priority, giving your preferred wifi routers precedent over the others.

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The iPad screen defaults to automatically dim itself and then turn itself off to black after a fairly short amount of time of inactivity. That’s great for preserving battery life of iOS devices, but if you’re like me you keep an iPad or iPhone alongside you full time while working as a control panel for Pandora, podcasts, and email, and having the screen lock after a few minutes of inactivity is annoying.

Fortunately you can adjust the amount of time it takes for the display of iPad to dim and lock itself.

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Apple is airing a new iPhone 4S commercial titled “Busy Day” that features director Martin Scorsese in a conversation with the voice assistant Siri while riding around in the back of a taxicab.

A transcript of the dialog between Scorsese and Siri is as follows, courtesy of MacRumors:

Scorsese: What’s my day look like?

Siri: Another busy day today.

Scorsese: Are you serious?

Siri: Yes, I’m not allowed to be frivolous.

Scorsese: Ah, OK. Move my 4 o’clock today to tomorrow. Change my 11AM to 2.

Siri: OK, Marty. I scheduled it for today.

Scorsese: Is that Rick? Where’s Rick?

Siri: Here’s Rick.

Scorsese: Oh, no that’s not Rick. Now, how’s the traffic headed downtown?

Siri: Here’s the traffic.

Scorsese: Oh, it’s terrible, terrible. Driver, driver, cut across. Cut across. We’ll never make it downtown this way. I like you Siri, you’re going places.

Siri: I’ll try to remember that.

This is the fourth iPhone 4S ad to feature a major celebrity, and the 3rd recent Apple commercial to be aired in general. Last month a new ad for the iPad started airing alongside a spot for the Retina MacBook Pro.

Though Mac OS X now includes built-in encoding tools to perform conversions of video to audio, you can also extract an audio track from a movie by using QuickTime Player. The great thing about ripping an audio track from a video this way is that mo downloads are necessary, and there is no enabling any buried features, it’s a simple Export setting in QuickTime and you’ll wind up with the audio track as an .m4a file.

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If you want to prevent someone from deleting apps on an iPhone, iPod touch, or iPhone, all you need to do is flick a Restrictions setting in iOS:

1. Open “Settings” and tap on “General”
2. Go to “Restrictions” and enter your pin code, locate “Deleting Apps” and switch to OFF
3. Exit out of Settings

You can confirm apps are no longer able to be deleted by tapping and holding on an apps icon to make them jiggle, where you’ll discover the (x) is now missing.

This is one of those must-have restrictions along with disabling in-app purchases if you’re letting little kids use an iPad or iPhone because it’ll stop them from accidentally deleting anything, but it’s also helpful for iOS devices that get public usage, or if you’re brave enough to let your dog or cat play games on the thing.

While you’re in the Restrictions menu it can also be a good idea to prevent the installation of new apps.

The next iPhone will feature a smaller dock connector and the headphone jack will be relocated to the bottom of the device, according to a new report from Reuters. This appears to confirm what is shown in the alleged pictures of iPhone 5 that were leaked to 9to5mac a few months ago.

Changing the dock connector is a potentially significant move because it may render previous chargers and accessories useless without an adapter. In a similar fashion, Apple recently changed the MagSafe adapters on new MacBook Pro and MacBook Air models, and though it’s unlikely Macs will share their power adapter with future iOS devices it is always possible that MagSafe technology will come to the iPhone connector.

iPhone 5 is expected to launch sometime this fall alongside iOS 6, and feature a redesigned enclosure, larger 4″ display, and various other rumored improvements.

Sleep can be invoked instantly on any Mac through the command line by running the pmset command or a very simple AppleScript run in Mac OS X. This can be useful for many reasons, whether scripting, system administration, remote management with SSH, or perhaps you just live in the command line.

We’ll show you two ways how you can initiate sleep on any Mac by using the command line.

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Though you can add anything to Spotlights Privacy list to prevent indexing of that folder or file, the obvious problem with that approach is the file or folder is shown within the Spotlight control panel in Mac OS X, making it easy for someone else to find the excluded items.

Another way to hide a file from Spotlight is to drop it in the user Library directory. This makes it invisible to the vast majority of people, and it also prevents the file from being indexed by Spotlight despite not being directly excluded. This works because Spotlight does not index the user Library directory which is typically just filled with preference and cache files.

• Get access to the Library folder in OS X, using Command+Shift+G to ~/Library/ is my preferred method
• Drag & drop a file or folder in the users Library directory
• Optional: add a layer of obfuscation by creating a boring sounding directory in ~/Library/, such as “Webkit Data”, and store the file or folders to hide in there

You can immediately confirm the file or folders contents are hidden from Spotlight by hitting Command+Space and entering the files name, it will no longer be found.

Just remember that if you keep the Library folder visible then your hidden file or folder may be easily found by prying eyes, though the nonsensical folder name may deter that. You can always follow one of the many other methods we’ve covered to hide things in OS X, ranging from hiding files with chflags, by placing a period in front of the folder name, and using visually invisible folders. Ultimately the safest approach is to password protect an encrypted disk image and store private documents and data there.

Though you can usually fix stuck app downloads by double-tapping the stuck icon, that doesn’t work with things downloaded from iTunes like podcasts, music, audio books, and video. If you find yourself forever waiting for a stuck media download from iTunes, the solution is very simple:

1. Launch iTunes and then tap on “Downloads”
2. Find the stuck download, swipe right on the item and delete it
3. Redownload as necessary

The file should download again without a problem.

This usually seems to happen when restoring an iOS device, regardless of whether the restore is from backups or a device is configured as new.

This helpful tip comes to us in the comments from Dave Brown, thanks a bunch to Dave and everyone who pointed out how effective this is.

Have a favorite website that you read on your iPhone, iPad, or iPod touch and perhaps you’d like to have faster access to it? You’re probably reading it this very minute, right? Of course you are, but rather than launching Safari first and then going to a web page, you can add this website or any other as a homescreen bookmark, making it instantly accessible from iOS with just a tap.

Setting up quick access to websites with a homescreen icon bookmark is super easy, this makes the website accessible right from the home screen just like an app would be, simply tapping the icon launches the webpage.

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Ever wondered what the Mac setup of a tech companies CEO would look like? If you guessed it’d be a series of awesome Apple hardware complete with an amazing view of New York City, you’d be right. Hardware shown in the picture includes:

• iPad 3
• iMac 27″ (2011) top of the line
• 2x Thunderbolt 27″ Apple displays
• Retina MacBook Pro
• iPhone 4S

The view is from Jersey City looking across the water into the financial district of Manhattan, where you can see One World Trade Center (Freedom Tower) being constructed. Not too shabby huh?

I’m not sure if they wanted some anonymity so we won’t mention the company name yet, but thanks to Carlos and Robb for sending us this awesome Mac setup!

Want your Mac setup shown on OSXDaily? Send us a good picture or two with a list of hardware and a brief description of what the Apple gear is used for to osxdailycom@gmail.com