How to check the Java version on your Mac using System Preferences 1. Click on the Apple logo in the top-left of your menu bar. 2. Scroll down and click on "System Preferences." 3.

To check which version of Java you have on your Windows computer, you'll need to open the Command Prompt app. If you don't have the latest version of Java installed, Windows may have trouble ...

Fortunately, there’s a way to review your system upgrade history, though you may have never needed to dig it up before: Hold down Option while choosing the menu and select System Information.