Apple has released Mac OS X 10.6.3 update; which is more robust and fast but several Mac users have reported a number of pre- and post- installation problems. If the installation doesn't go as expected, it often requires Mac Recovery solutions to deal with the specific issues. Here, we'll discuss one of such issues. After you install Mac OS X 10.6.3 update, chances are that you may observe some graphics-related problems. More specifically, you might fail to get external monitors to work or in some cases, show the native resolution.
When you connect and detect the monitor, it shows the text and images to look blurry and larger.
Though no actual fix has been determined yet, but you can try the following solutions to recover from these problems:
Try resetting the PRAM. The system's PRAM holds various display settings, so resetting it can fix problems including when your computer doesn't start up properly.
If resetting PRAM doesn't work, try booting the computer in Safe mode and running Disk Utility to fix permissions. You can also clean the boot cache using a specific application.
Adaptor incompatibility might be creating the issue. If your monitor supports VGA and you use DisplayPort to DVI adaptor, you should replace it with DisplayPort to VGA adaptor.
Go to /System/Library/Displays/Overrides/ folder and delete the display overrides, without removing them from Trash. Restart the computer and check is the problem goes away. If the issue no longer exists, you can empty the Trash or otherwise, restore the deleted overrides to the original location.
Go to /Macintosh HD/Library/Preferences/ and username/Library/Preferences/ByHost/ folders and delete com.apple.windowserver.plist and com.apple.windowserver.NUMBER.plist files respectively. If this resolves your issue after restarting the computer, windowserver preferences corruption was the issue.
Run a full permissions fix, boot in Safe mode and apply the 10.6.3 'Combo' update.
If a valid 10.6.2 backup exists, restore to the backup. If the update is required, try updating again, but with the Combo update in Safe mode. In case no suitable data backup is available, you can use a Mac File Recovery software to recover the lost files and folders.
Mac Recovery software can recover lost data, irrespective of the cause. it is recommended to use an application called Stellar Phoenix Macintosh Data Recovery software. This Mac File Recovery utility supports Mac OS X 10.6.x, 10.5.x, 10.4.x, and 10.3.9 and can recover almost all file types.
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