Definitions for "About This Mac"
This is the first item under the Apple Menu when the Finder is active. It give you some important information about your computer and what it currently is doing. It lists the type of computer, the system version (and may indicate any system patches you have installed), and the amount of memory each of your currently running programs is using, along with how much free memory you have. You can use this information to do a bit of memory management (see Get Info below).