I have a question regarding the use of the Apple macOS and Xcode in a university environment for practical sessions. In particular, I'm interested in knowing if our students can use macOS running on QEMU on regular PCs, for practicing around the Mach microkernel interface. In our course about operating systems, we have a long tradition of using Mach (since the '90s) and GNU Hurd (since around 2010) for our students' practical sessions. Now, we managed to do the same with macOS by downloading and installing the recovery images in a QEMU-based VM. We would love to be able to use this installation for practicing, as it offers a full system that can actually be used in production environments, with the Mach OS interface. Would that break Apple copyrights? Is it legal? Thanks for your comments about this topic!, Xavier Martorell