MacOS X: Which operating system do I have?
If you're not sure which operating system you have installed on your Mac, find out quickly. We'll show you where to find the info.
MacOS: Find out the operating system version
- Click the apple in the upper left.
- Open the item "About this Mac".
- A window opens in which you can see which version you have on the Mac, for example OS X version 10.9.1.
This guide will tell you how to reinstall your Mac OS X.