Step 1: Find Your Mac OS X Version
The first step in securing your Mac is to know what OS version is installed. Although portions of this document are applicable for older Mac OS X versions, this was written with Mac OS X 10.4 and 10.5 in mind. Use the following steps to find your Mac OS X version.
- From the Apple menu, select About This Mac.
- The version number will appear in the window.

Note: You are ENCOURAGED to upgrade your computer to Mac OS X 10.4 or later. For more information on upgrading visit Apple's web site. You may also purchase an upgrade at the Carnegie Mellon Computer Store.
Last Updated: 1/15/08