I tried finding the 10.6.3 update on Apple.com (instead of Software Update) and every single page I found that mentioned 10.6.3 is missing completely. Then I found the actual download link and that also doesn't work. Has Apple removed the update from their site? Here's the official download link: http://support.apple.com/downloads/DL1017/en_US/MacOSXUpdCombo10.6.3.dmg 10.6.3 Update: http://support.apple.com/kb/DL1018 10.6.3 Combo Update: http://support.apple.com/kb/DL1017 Here's the downloads page for Mac OS X 10.6: http://support.apple.com/downloads/#macosx106 Click on any of the 10.6.3 downloads and they fail with 404 error. Was there a serious issue with this update and they yanked it?