Identifying Your Operating System Version, Processor Type, and Memory

The latest Macintosh computers use Mac OS X 10.7 Lion as their operating system. However, Apple constantly releases updates, so by the time you read this, your Macintosh may be running version 10.7.1 or 10.7.5. Since many programs won’t work if your computer uses a version of Mac OS X that doesn’t meet the software publisher’s requirements, you need to know exactly which version your computer is running before you buy any software or accessories that might not run on your computer.

To identify the version of the Mac OS X operating system you’re using, do this:

  1. Click the Apple menu and choose About This Mac. An About This Mac window appears, as shown in Figure 51-1.

  2. Click the

Get My New Mac, Lion Edition now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.

Start your free trial