Mac OS X 10.6.3 update is a recommended update that is available for improving system's performance, compatibility, and security. When installing this update using Software Update, Combo installer, or Delta, chances are that you may encounter issues when system might hang. Though this issue is rarely observed but when it occurs, you may find your computer unbootable with no apparent option to access the system.
These are some situations when you need some Apple Recovery tips to troubleshoot the behavior.
Before mentioning the solutions to these problems, let's first consider a related situation and then the corresponding symptoms of this problem. Suppose you, as an Mac OS 10.6 user, decide to install the OS X 10.6.3 update. But contrary to your expectations, the installation process hangs. Consequently, the installation just sits there with a spinning color wheel.
Alternatively, you may see a blank screen, which is blue, gray, or black in color. In some situations, after you restart the computer forcefully, the system might appear as healthy but with some corrupted files. This typically occurs when system runs restarting commands or performs some maintenance-based tasks.
Following are the basic solutions to isolate the depicted hang problems when installing a Mac update:
Make sure that you give ample amount of time, precisely up to half an hour, for installation process to continue properly
If the hard drive stops responding at all, hard-reset it then only. In other situations, wait until you stop hearing any sound from the hard drive.
Boot the computer immediately after powering down in safe mode. You can then run steps to verify hard disk integrity, fix permissions, and run system maintenance utilities.
It is highly recommended to download and run 'Combo' updater in safe mode even if the computer works properly,
Use Disk Utility to fix permissions
If the installation doesn't work as expected, perform archive and install or restore from the last available data backup and install Snow Leopard from install DVD, whichever suitable and works.
In case of any data backup related concerns, before or after reinstalling Snow Leopard, you can use Apple Recovery Software, which are available for recovering lost and deleted data in such situations. Apple OS X Recovery are simple-to-use and can be used to recover lost data while any logical crash.
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