It's possible to create an OSX VM under KVM. It's a little clunky, you get very bad graphics performances, and you can run in really weird issues (for example,

It's possible to create an OSX VM under KVM. It's a little clunky, you get very bad graphics performances, and you can run in really weird issues (for example, the NIC not going-up properly), but it works, and if you are using it as a CI platform and/or only sshing into it, it's more than usable. It's really handy when you are testing/adding support for projects (like C/C++ with cmake) on OSX.