I have two Macs and a couple of Windows boxes - If I take screenshots (also looking at the screens...) of anything on each of them the Windows machines and one Mac look the same, but my Mac looks different. Why? How do I fix that?

As an example, Mac that works: ![Correct](https://i.stack.imgur.com/RBrav.png)

Mac that doesn't: ![Wrong](https://i.stack.imgur.com/Twc5I.png)

What do I change to make this work?