This tutorial is based on all versions of BlueStacks for Windows as well as Mac.
1. For Windows:
Hover the mouse over the BlueStacks icon in the Windows System Tray / Notification Area at the bottom right corner of your PC's screen.
2. For Mac:
Follow the steps mentioned below to find the version number of BlueStacks on MAC:
a. Launch BlueStacks App player.
b. Click on 'BlueStacks' on the top-left corner of the menu bar.
c. From the drop-down list, select 'About BlueStacks' option.
d. A pop-up will appear containing the app player version information.