How to Picture in Picture on mac in any app? I want to use Picture in Picture feature that MacOS has with safari or iTunes but with any app. For example I want to know my cores work with htop in an iTerm instance always on display like this:



but this feature seems to be only in those apps. Is there any built-in app that can do this?
Is there any built-in app that can do this?


There is no built-in way in macOS that can do this. Picture in Picture is available only for watching videos:


Watch video using Picture in Picture on your Mac