Both DR 12.5 Studio and 14 Studio now work on this machine. Originally last year I had 12.5 (free) and 12.5 Studio (paid version). The paid 12.5 Studio version icon was dragged into a new folder I named " Davinci 12 studio" a few months ago and both still I did this based on a comment in the Blackmagic Forum on 14 DR Beta. The folders name doesnt matter, you just do not want 14 beta to blow away 12.5 Studio. When I did install 14 studio beta it removed the free 12.5 version, ok I wish it was still there and maybe I should have placed it too in another folder? Anyway with a Danvini USB Dongle now my 14 Studio beta works in OSX and the older 12.5 Studio paid version does too. OSX 10.12.5 Sierra MBP15