Make another borderless application window

Question

Is there a way to remove a window border (i.e. make style NSBorderlessWindowMask ) for a window belonging to another application?

Answer 1

These windows do not belong to your application. Your only hope is hacking.

Take a look at something like SIMBL to enter code into other applications. There is also an ApplicationEnhancer .

Good luck - here you can ruin other applications or the whole system. In addition, I highly doubt that Apple will allow you to play in its App Store if your application does.