The OS X Mountain Lion v10.8.1 Update is recommended for all Mountain Lion users and includes general operating system fixes that improve the stability, compatibility, and security of your Mac.

Updating your system

You should back up your system before installation; you can use Time Machine.

Do not interrupt the installation process once you have started to update your system.

You may experience unexpected results if you have third-party system software modi?cations installed, or if you've modi?ed the operating system through other means.

Choose Apple (?) menu >