Mac OS X Software Update
Apple frequently releases updates to your computer's software.
The Software Update feature in Mac OS X makes it very easy to
determine and get exactly what you need.
Update now
To get updates immediately:
1. From the Apple menu, choose Software
Update.

2. In the Software Update window, select the items you want to
install, then click the Install button.

3. Enter an administrator account name and password, then click
OK.

4. The updates will begin to download and install.

5. After the update is complete, restart the computer if
required.

6. Repeat these steps to see if more updates are now available.
Because some software updates are prerequisites for others, you may
need to repeat these steps several times to complete the software
update sequence.
Scheduling an update
The Software Update preference pane lets you schedule automatic
checks for updates. In fact, it's set to automatically check by
default. You can change the check interval from weekly to daily or
monthly, or you could turn off scheduled checks if you want.
NOTE: If you want your computer to
download important updates without asking, select "Download
important updates in the background".
Hide updates you don't need
Sometimes you're going to see an update in the Software Update
list that you don't need. Rather than having to see that
unnecessary update every time you check, you have the option to
hide it by making it inactive.
Using standalone installers
Sometimes a standalone installer is more useful than the
automatic Software Update feature. Examples include when you:
- Anticipate needing the file again later
- Need to install on multiple computers and need a portable
file
- Have a faster Internet connection available to you at another
computer
- Have no Internet connection on the computer that needs the
update
You can get standalone copies of Apple software updates from Apple Downloads.
Carefully read the stated system requirements before using a
standalone installer. Be sure to install them in the correct order
when applicable, or only on compatible systems when applicable.