How to Get Software Updates in Offline Mode for Mac OS X?

"Apple lets you download the programs just the same from their website in most cases. Usually, an update just involves replacing the existing application in the applications folder with the new one. This includes common applications such as Safari, iTunes, etc.

For things that aren't as easy such as quicktime updates, you should check the apple support page since they usually allow you to download the updates.

Once you have the updates, put them on a USB Key and run them on home mac.

I'd start here http://www.apple.com/downloads/ . For some items that are more integral to the system, they might only be available through Software Update in the Apple Menu."

"You can download standalone software updaters from Software Update; look under the ""Update"" menu item and select ""Download only."" They will download to Harddrive/Library/Packages/

For standalone system software updaters to carry on a USB drive, it's a good idea to get the Combo Updaters, which cover more ""jumps"" in OS versions, and are the recommended fix for software updates that don't go as planned (by booting from a USB or Firewire drive and reapplying the Combo Update)."