Borderless window on macos

[tetris-hermetris]

Is it any way to create a borderless window in macOS using nimx? (styleMask: .borderless)
Something like this:

Maybe some AppKit-only solution?

[yglukhov]

I don't think nimx exposes any direct api to do that, but at least it should be possible to create a window natively and pass it to nimx or SDL_CreateWindowFrom and then pass it to nimx, or something like that. Until now it was a road less taken, so PRs are welcome :)

[nixfreak]

I thought you could use alpha for that