Ignore Software Updates
It’s really convenient that you get get all the updates for the Apple software on your Mac by going to the Apple menu and choosing "Software Update...". However, occasionally you might want to skip an update, and you don't want Software Update to carry on reminding you to update. A common example is a printer drivers update for a printer you don't use very often or not at all any more.
To ignore an update, just select it in the list and choose "Ignore Update..." from the Update menu. Alternatively you can just press the delete key. Now the update will stop showing up in the list of new software.
If you change your mind, you can all you ignored updates back by choosing "Reset Ignored Updates" from the Software Update menu. Unfortunately this will bring back all of your ignored updates, so if you only want to bring back one you will have to ignore all the rest again.