Windows or Mac Operating System Version. Update your computer's OS version? bick Updated December 28, 2017 17:00 Follow Question: It's best to have the latest version Windows or Mac Operating system. How do I check my version? Comments 1 comment Sort by Date Votes bick December 11, 2010 20:59 On a Mac: Select the Apple at the top Left, About this Mac, and the version will be displayed. See below. In this example, just below MAC OS X you see Version 10.6.5. What do you see? In Windows: Select the Windows flag at the bottom left: Then select Control Panel. One the next scree. See below, select getting started with windows. Now select show more details. Finally, read the operating system and version or service pack level. That's what we need to know to help you get started. 0 Permalink Please sign in to leave a comment.