I've got an OSX build box with a bunch of virtualbox VMs so I can build for Gnu/Linux (i386, x86_64, and arm), OSX, and Windows. Single slow box, so one runner at a time. It has to be running OSX because I haven't found any way to run an OSX VM on any other platform.
I want to trigger CI on Gitlab merge requests.
What does $competent_CI expand to?
Specifically: https://github.com/kstenerud/virtual-builders/tree/master/bu...
It is fairly easy to get decent OS X virtualization using Debian as base OS and QEMU-KVM for virtualization. You won't have niceties such as GPU acceleration but it will work.
Search for "OSX KVM" on Google, it will take you where you want - unfortunately a direct link would expose me to legal liabilities. Also, be warned that using this method may violate Apple's EULA.
Also, performance was atrocious. It was so bad as to basically make it unusable. 5 second delay before processing mouse and key events.
It's really handy when you are testing/adding support for projects (like C/C++ with cmake) on OSX.
They are fragile systems that one doesn't really want to risk production environments on in my opinion.
That’s an admittedly big caveat, but also one of the reasons why virtualizing OSX works in the first place.