1. Mac check for Updates via the Terminal
All of the following actions will take place in the so-called Terminal. To open it, proceed as follows:
- Open "Programs" -> "Utilities" -> "Terminal.app", or enter in the Spotlight search window the term "Terminal".
- To see the available Updates displays, enter in Terminal the following: "sudo software update -l" (alternatively "sudo software update --list") - close the entry with [Enter].
- Now enter your password and confirm with the [Enter] button. Depending on the size of the Updates, it will be displayed take up the result.

Mac OS X Update via the Terminal
All Updates for Mac OS X on the install console
To install all the available Updates, use the following command:
- "sudo software update -i-a" followed by [Enter].
- If necessary, enter your password and confirm with the [Enter] button.
Recommended Mac install OS X Updates via the Terminal
You want to install only the recommended Updates, type in your Terminal as follows:
- "sudo software update -i-r" followed by [Enter].
- If necessary, enter your password and then press the [Enter] button.
How to make iTunes update can be read here.