The older mac mini's latest OS has a "bootcamp" app that requires windows 7 or 8; nothing newer. It flat out rejects windows 10 (they left Number 9 to the Beatles). By some stupid miracle I had a Windows 8.1 install DVD, an external drive, and a valid registration code. It still was a struggle to install it and then E-tube v. 3.4.5 (I need the earlier one first, so that my older hardware all gets recognized -- learned that the hard way last time around with my wife's bike).