I liked the feature in Linux where you could simply turn a window transparent. I also had an app for Windows that did it, called Peek Through that did it. I finally came back to macOS and now I want a similar feature. I don't know the Swift/C langs, but I know the command line pretty well (kinda rusty, my short stint with windows didn't help any). I have seen the "Deskovery" app but I don't want to pay money for it. I have seen the old app "afloat" but I am pretty sure that doesn't work on newer computers. I am on a MacBook Pro 8,1 running macOS Mojave. Any help is greatly appreciated. Thanks a lot!

  • I think the closest thing in macOS is to minimize the window (Command + M). You can also Hide the window (Command + H).
    – Todd
    May 18, 2020 at 16:55
  • Yes, but I would like to make it transparent.... There must be some bash command, right?
    – gaetgu
    May 18, 2020 at 17:00
  • What do you mean by transparent? I am pretty sure there is no Bash command to do this. I think the best option is still to Hide the Window using Command + H.
    – Todd
    May 18, 2020 at 17:01
  • I mean make it semi-transparent. take a look at the mentioned app for windows. It just allows you to see through the selected app while still keeping the app above the other one.
    – gaetgu
    May 18, 2020 at 18:00
  • Does this answer your question? stackoverflow.com/questions/11174918/…
    – Todd
    May 18, 2020 at 18:18

1 Answer 1


Here is a post that uses Swift/Objective-C code to create a semi-transparency thing. https://stackoverflow.com/questions/11174918/how-to-get-window-with-semi-transparent-blurred-background.

  • How can you use this to make an existing window semi-transparent?
    – nohillside
    May 18, 2020 at 19:29
  • The OP says it works so I guess it fits their needs.
    – Todd
    May 18, 2020 at 19:42

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