Comments on: OS X Mountain Lion Developer Preview 3 Available for Dev Download

By: richardheath94

richardheath94 — Sat, 09 Jun 2012 08:16:46 +0000

I am doing this also, but apparently we can’t upgrade from this to the retail version…. I’m thinking i will have to go back to lion??

By: Isidiros Sklivanos

Isidiros Sklivanos — Mon, 07 May 2012 13:34:02 +0000

DP3 is a very fast and stable release i use it with no errors,bugs or anything else.I note that i am using final cut studio professionally.

By: doctorfresh

doctorfresh — Fri, 27 Apr 2012 10:06:26 +0000

Brah

1. Insert start up disk (doesn’t matter which system)
2. When available, select disk utilities from menu (at top)
3. Restore from time machine backup (assuming you have one)

Otherwise – you should have made a backup (reboot) disk (on USB flash drive or whatever) when you installed Lion

Otherwise – you could restore your system to Snow Leopard (or whatever disk you have), then upgrade to Lion through the App Store, which will recall that you have bought it

Takes a while but worth it to clear the rubbish off the hard drive anyway. I like a good clean install from time to time

Re ML: I found that one of the settings in Mail was broken and it said that SSL was off (i.e. box unticked) when it was in fact on. So, I couldn’t use Mail in ML to get my works mail, which was a deal breaker for me (for now). I did like the Reminders App (and Notifications)

Looking forward to the final or closer versions when the bug in Mail has been fixed.

By: brah

brah — Tue, 24 Apr 2012 02:01:34 +0000

Hi, how do I reinstall lion over mt lion dev preview?

Without having to do a erase of the entire disk : (

Thanks! Lol this is my spare imac so it’s not end of world but rather avoid having to copy few hundred gigs of junk.

By: Jeffrey A Barclay

Jeffrey A Barclay — Mon, 23 Apr 2012 12:35:24 +0000

Overall – works fine, only issue I’m having is Safari crashes after 1-2 min. Here is part of the error log:

Process: Safari [690]
Path: /Applications/Safari.app/Contents/MacOS/Safari
Identifier: com.apple.Safari
Version: 5.2 (8536.6.1)
Build Info: WebBrowser-7536006001000000~6
Code Type: X86-64 (Native)
Parent Process: launchd [153]
User ID: 501

Date/Time: 2012-04-23 08:34:13.649 -0400
OS Version: Mac OS X 10.8 (12A178q)
Report Version: 10

Interval Since Last Report: 22518 sec
Crashes Since Last Report: 8
Per-App Interval Since Last Report: 210 sec
Per-App Crashes Since Last Report: 7
Anonymous UUID: F7FAA124-8958-46A0-9484-1B3414A1D241

Crashed Thread: 0 Dispatch queue: NSPersistentUI Work

Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0×0000000000000000

VM Regions Near 0:
–>
__TEXT 0000000101a6f000-0000000101a70000 [ 4K] r-x/rwx SM=COW /Applications/Safari.app/Contents/MacOS/Safari

Application Specific Information:
Enabled Extensions:
com.diigo.safari.awesomeScreenshot-5DXNM3K2CT (1.3.2 – 1.3.2) Awesome Screenshot
com.jeremyhubert.livecsseditor-6ULL56D9UV (1.1 – 1.1) Live CSS Editor
com.awarepixel.safari.bettersource-24E7DYSH92 (1.0 – 1.0) BetterSource
com.sonereker.vss-6GDPUK989W (1 – 1.1) View Style Sheets
com.personalwebdesign.googletoolbar-CW7MY6965B (9 – 1.9) GoogleToolBar

objc[690]: garbage collection is OFF

Thread 0 Crashed:: 0 com.apple.CoreGraphics 1 com.apple.CoreGraphics 2 com.apple.CoreGraphics 3 com.apple.CoreGraphics 4 com.apple.CoreGraphics 5 com.apple.AppKit 6 com.apple.AppKit 7 com.apple.AppKit 8 libdispatch.dylib 9 libdispatch.dylib 10 com.apple.AppKit 11 com.apple.AppKit 12 com.apple.AppKit 13 libdispatch.dylib 14 libdispatch.dylib 15 libdispatch.dylib 16 libdispatch.dylib 17 com.apple.CoreFoundation 18 com.apple.CoreFoundation 19 com.apple.HIToolbox 20 com.apple.HIToolbox 21 com.apple.HIToolbox 22 com.apple.AppKit 23 com.apple.AppKit 24 com.apple.Safari.framework 25 com.apple.AppKit 26 com.apple.AppKit 27 com.apple.Safari.framework 28 libdyld.dylib Dispatch queue: NSPersistentUI Work
0x00007fff841f4461 CGSShmemGuardLock + 14
0x00007fff841f37b4 _CGSLockWindow + 1154
0x00007fff8428f2c9 CGSLockWindowBackingStore + 234
0x00007fff8428ee50 __CGPixelAccessLockWindowAccess + 90
0x00007fff8428eddb CGPixelAccessLock + 46
0x00007fff87a33258 -[NSPersistentUIManager snapshotWindow:handler:] + 202
0x00007fff88231616 -[NSPersistentUIManager _updateSnapshotForWindowNumber:forWindowID:encryptionUUID:encryptionKey:encryptionKeyGeneration:waitUntilDone:] + 564
0x00007fff8822e839 __85-[NSPersistentUIManager flushAllChangesOptionallyWaitingUntilDone:updatingSnapshots:]_block_invoke_0 + 1334
0x00007fff878f8527 _dispatch_client_callout + 8
0x00007fff878ebfb3 _dispatch_barrier_sync_f_invoke + 39
0x00007fff87a326b0 -[NSPersistentUIManager flushAllChangesOptionallyWaitingUntilDone:updatingSnapshots:] + 675
0x00007fff87a323d7 -[NSPersistentUIManager flushPersistentStateAndClose:waitingUntilDone:] + 180
0x00007fff88230655 __42-[NSPersistentUIManager acquireDirtyState]_block_invoke_0 + 55
0x00007fff878f8527 _dispatch_client_callout + 8
0x00007fff878ead13 _dispatch_source_invoke + 691
0x00007fff878ea7b7 _dispatch_queue_invoke + 72
0x00007fff878edbc0 _dispatch_main_queue_callback_4CF + 220
0x00007fff8b0a5d9e __CFRunLoopRun + 1614
0x00007fff8b0a5352 CFRunLoopRunSpecific + 290
0x00007fff87019d14 RunCurrentEventLoopInMode + 209
0x00007fff8702155e ReceiveNextEventCommon + 356
0x00007fff870213ef BlockUntilNextEventMatchingListInMode + 62
0x00007fff879de39b _DPSNextEvent + 685
0x00007fff879ddc59 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 128
0x00007fff86bafcaa -[BrowserApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 162
0x00007fff879da283 -[NSApplication run] + 517
0x00007fff87c498bb NSApplicationMain + 869
0x00007fff86d6fb36 SafariMain + 166
0x00007fff84f557e1 start + 1

By: Gaboriker

Gaboriker — Sun, 22 Apr 2012 11:09:59 +0000

Hy guys.
I use the DP3 as my main system on a latest Mini.
I use my computer for everyday use..
The new DP works fine.. I dont met with crashes. I use Chrome on it, i dont like safari.

By: kaps

kaps — Sun, 22 Apr 2012 04:12:28 +0000

Is mirroring active on DP3

By: Varadero

Varadero — Fri, 20 Apr 2012 07:20:17 +0000

Amazing! works perfectly! I am using DP3 as my main system and there are no issues; safari crashing was fixed, and imessage now works much better in terms of sync.
Super

By: Mr. Hilarious

Mr. Hilarious — Thu, 19 Apr 2012 19:06:41 +0000

beta version, wait for a better version

By: adam

adam — Thu, 19 Apr 2012 17:31:52 +0000

I almost use only Mountain Lion from the DP1, It work nice, so better than lion or leopard when was in Development… It’s Natural, Leopard and Lion was have big OS Changes… Mountain Lion is what was Snow Leopard after Leopard, a big Clean Debug…

By: Dave

Dave — Thu, 19 Apr 2012 00:37:41 +0000

Can you tell me if it puts Ad-Hoc Networks back in and I might think about updating. That is all that will make it worthwhile. As I don’t care about bugs and I am on the dev program but not actually a dev.
If you don’t know how go to the airport button and click create local network. (If its there)
Thanks

By: Brett Lewis

Brett Lewis — Thu, 19 Apr 2012 00:31:16 +0000

I have been used both build 1 and build 2 on my personal and work machines. Just updated to build 3 and everything works. Amazing that you get complainers about bugs in pre-release software. That is why they have it in beta.

By: Dave

Dave — Thu, 19 Apr 2012 00:20:43 +0000

To be honest neither of them were unstable for general every day use. I use my Mac running Developer Build 1 as the main operating system for about 10 hours a day and the only errors I ever got were with Safari bugging out occasionally and not being able to restart with Mail open. That was basically it apart from minor things.

By: Tom

Tom — Wed, 18 Apr 2012 23:05:16 +0000

DP1 and DP2 were basically unusable, hope this one is better.

By: Release Notes

Release Notes — Wed, 18 Apr 2012 20:04:38 +0000

Release Notes

OS X Mountain Lion Developer Preview 3 is prerelease software. Do not use this prerelease software in a commercial operating environment or with important data. You should back up all of your data before installing this software and regularly back up data while using the software. You will not be able to upgrade from the OS X Mountain Lion Developer Preview to the ﬁnal release.

If an installation of OS X Developer Preview 3 fails, try using Disk Utility from a Recovery HD to repair the disk.

Architecture Requirements
The OS X Mountain Lion Developer Preview supports the following Macs:
• iMac (Mid 2007 or later)
• MacBook (13-inch Aluminum, Late 2008), (13-inch, Early 2009 or later)
• MacBook Pro (13-inch, Mid-2009 or later), (15-inch, Mid/Late 2007 or later), (17-inch, Late 2007 or later)
• MacBook Air (Late 2008 or later)
• Mac Mini (Early 2009 or later)
• Mac Pro (Early 2008 or later)

Known Issues
- On systems with FileVault enabled, canceling the restart to the Mountain Lion Developer Preview 3 Installer may leave your system unable to present a password dialog at boot time. You
can repair the problem by holding down command-R to boot to the Recovery OS and then using Disk Utility to unlock and Repair your volume.
- Installing OS X 10.8 over 10.7.2 or earlier with FileVault turned on may fail
- Pre-Lion FileVault user accounts are not supported in this Developer Preview
- Some Apple menu items such as Restart may not work when a sandboxed app is in the foreground
- iTunes no longer syncs Notes
- Mail’s photo browser cannot access the iPhoto library
- Back to My Mac doesn’t work for the ﬁrst 5 minutes after rebooting
- DVD Player may not launch after inserting a DVD on some systems
- Most help topics are unavailable in this Developer Preview
- In the Recovery HD:
- Some icons may be missing
- Network Utility’s Lookup pane does not work
- Time Machine restoration via a AFP share does not work
- Restoring from a Time Machine backup via AFP does not work
- Migration from a Time Machine backup that excludes paths such as /System may yield an unusable system
- Brightness settings may change unexpectedly after reboot
- Display brightness may be dim after sleep or reboot
- If Mail is hidden at logout time, it may not be correctly relaunched during a subsequent login but will appear to be running
- Java applets may not work in Safari
- QuickTime screen recordings may produce corrupted videos or cause an exception when run on machines with NVDIA graphics
Game Center
- In this seed, the Game Center application will view Production data by default. Games in development will be programmatically switched to use the Sandbox server environment
- No Top Games are displayed on the Me tab and no game recommendations are shown on the Games tab
- To use Game Center in your game on OS X, you must install a provisioning proﬁle that enables Game Center for your app. Code signing, entitlements, and provisioning proﬁles are all
described in detail in Tools Workﬂow Guide for Mac
- Multiplayer gaming with Game Center between iOS and OS X is not available in this seed
- In the Game Center app, game detail information such as game provider, pricing, etc. is not displayed
- The local peer-to-peer GameKit API (GKSession, GKPeerPickerController, and related classes) is not supported

Bug Reporting
This build is being provided to you for testing and development purposes. Should you encounter any problems, please submit a bug report using the online Bug Reporter at bugreporter.apple.com/>. Please make sure to include “10.8 (12A178q)” in the bug title and description. This information will ensure that your bug is processed quickly.

When submitting a bug report, please make sure to include a Summary, Steps to Reproduce, Expected Results, Actual Results, and the diagnostic output generated by running ʻsudo sysdiagnoseʼ in the Terminal.

For complete instructions on submitting bug reports, please visit the Bug Reporting page at .

Thank you for your support.

Apple World wide Developer Relations