In addition to releasing new versions of the system software at regular intervals, Apple also releases a stream of free software updates to enrich your computing experience.

Call it a Software Update

Mac OS X automatically checks weekly for software updates provided you have an Internet connection. You can choose a different schedule, or check manually if you don’t have a continuous Internet connection. If Software Update finds an item to download, it appears in a list. Click on an item to get a description before downloading it. If you see updates that you will never use, such as a language you don’t speak or drivers for a printer you don’t own, choose Make Inactive from the Update menu. You can always view the hidden updates, should you discover you need them in the future.