Edit: After half day, my wife’s Mac started having the same problem. I have then applied the solution that I found in the Apple
Apple Release 10.6.3
Apple have released 10.6.3 via software update. To download the massive 700MB worth of improvements to OSX choose Software Update from the Apple menu to check for the latest Apple software via the Internet, including this update.
If your computer is not up-to-date, other software updates available for your computer may appear, which you should install. When Software Updates states “Your software is up to date,” you can be sure that all available updates have been installed.
Note that an update size may vary from computer-to-computer when installed using Software Update. Also, some updates must be installed prior to others, so you should run Software Update more than once to make sure you have all available updates.
You can manually download the update installer. This is a useful option when you need to update multiple computers but only want to download the update once. These versions of the standalone installers are available from Apple Support Downloads.
- General operating system fixes and improvements provided for:
- performance of Logic Pro 9 and Main Stage 2 when running in 64-bit mode.
- printing reliability.
- sleep and wake reliability when using Bonjour wake on demand.
- a color issue in iMovie with HD content.
- glowing, stuck, or dark pixels when viewing video from the iMac (Late 2009) built-in iSight camera.
- an issue in which the Finder reports a -36 error when copying directories to a drive formatted as FAT32.
- reliability of photo screen savers.
- compatibility issues with OpenGL-based applications.
- an issue in which shadows in PDF of Aperture book are black instead of gray.
- an issue in which the microphone level in iChat may not increase the volume after reducing it to prevent a feedback event.
- the reliability of certain third-party USB devices.
- the Accounts preference pane can now limit login to members of groups hosted by a non-Apple directory service, such as Active Directory.
- DNS server ordering as specified in Network Preferences and DNS reliability. For details about how Mac OS X v10.6 handles unresponsive DNS servers.
- the reliability and compatibility of QuickTime X.
- Data Collection: Mac OS X v10.6.3 can collect diagnostic and usage information from your Mac and send it to Apple for analysis automatically. The information is only collected with your explicit consent, and is submitted anonymously to Apple.
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