You can permanently ignore any Mac OS X software updates that you don’t want to install.

When Mac OS X notifies me that software updates are available, I don’t always want to install all of them, as I don’t use the applications they refer to. Then, the next time software updates are available, they show up again—and the list keeps growing. Is there any way of telling my Mac that I’m not interested?

Yes, you can tell Mac OS X’s Software Update to stop reminding you about updates that you don’t care about. Use caution when doing this, however, because many software updates provide important bug fixes and security patches that may improve a variety of different components on your Mac.

Select Software Update from the Apple menu to launch the Software Update application. If you see an update listed that you never want to install, click the name of the update and choose Update > Ignore Update (or press the Delete key on your keyboard). Software Update will ask if you’re sure you want to remove the update from your list. Once you agree, Software Update will no longer notify you of new versions of that update.

If you change your mind in the future and you’d like to see all of your removed updates again, launch Software Update and choose Software Update > Reset Ignored Updates.