Hello everyone, I confirm also that the patch is working on my early 2009 Mac mini (3,1) nicely, except wi-fi and universal copy paste (due to handoff-->no Bluetooth 4.0).
By the way, can you do updates from the Appstore? I have iTunes 12.5 and macOS Recovery HD Update 1.0 stuck at "0 byte from 656 MB - Calculating..." message whenever I press update. Has anyone faced this problem too? I can install though apps from the Appstore without problem.
Problem already solved:
https://forums.developer.apple.com/thread/51187
https://forums.developer.apple.com/thread/51107