Resources for Retro style Games wanting 90 degree Window corners

I've been thinking of bringing some older games back to the modern Mac.

Rewriting old titles in Swift but using the original data files that assume use of non-rounded corners Windows.

Many of these games require all the Window space of a 90 degree cornered Window.

Can anyone point me at some useful workarounds or Is Apple simply deaf to the needs of this type of product?

This is just something I'm think of doing and I asm using Thexder, somethingI worked on a loooong time ago and am thus familiar with, as a away to learn Swift and Apples modern API's.

In AppKit parlance you can use a borderless window to eschew all of the system UI styling including the corner radius.

By default a borderless window does not receive any built-in UI affordances; it's essentially just a rectangle you can draw into, and you need to re-add the UI behaviors that you want. Therefore, for example, if you want the window to get key focus or serve as your app's 'main' window, you'll need to layer those behaviors back in by overriding canBecomeKeyWindow and canBecomeMainWindow to return true.

Resources for Retro style Games wanting 90 degree Window corners
 
 
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