That does not seem to actually be "in a docker container"?

It is just using docker to run the VM software (qemu with kvm) and runs macOS in that VM.

It is conveniently packaged up, but the title is very, very misleading.

https://github.com/sickcodes/Docker-OSX seems more established. I used it a while back when I was in a country where that was legal. These days I just use GitHub Actions instead.

But, why?

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