Apple Lossless compressor no longer available after upgrading to Mac OS X 10.3.3
If you install the QuickTime 6.5.1 update before the Mac OS X 10.3.3 update, the Apple Lossless codec will disappear from the list of available compressors for audio export in the QuickTime Movie Sound Settings Export Options dialog.
Products Affected
QuickTime, Mac OS X 10.3
To avoid this, install the Mac OS X 10.3.3 update before updating to QuickTime 6.5.1.
If you have updated and are missing the Apple Lossless codec, reinstall QuickTime 6.5.1 or later. It's available from the QuickTime website.
If you have updated and are missing the Apple Lossless codec, reinstall QuickTime 6.5.1 or later. It's available from the QuickTime website.