Here is an HCL report for Apple Mac Mini (late 2012 model). The R2rc2 installer hangs after post-installation reboot while detecting networking hardware, so I just booted from a pendrive with Qubes installed by a Thinkpad T420. I also needed to update the list of devices assigned to netvm, otherwise it crashed badly during its launch.
I tested networking, torvm, split pgp, no problems observed. Even Windows 7 HVM (again, installed while running on Thinkpad) behaves, although I could not get Xen networking driver to work.