[DCP-o-matic] Stable release: 2.12.20

I downloaded 2.12.20 and it would not open. I am running it on a MAC 5.1 2012, OSX High Sierra 10.13.6 Tom Rovak CSI- Executive Producer / Sr. Colorist / Post Production Supervisor Commercials, Features, Music Videos, Episodic Color Correction, Dailies, Editorial, Finish/VFX trovak(a)comcast.net (815)690-8323 IMDB:http://www/ .imdb.com/name/nm1652946/?ref_=rvi_nm http://www.imdb.com/name/nm1652946/?ref_=rvi_nm Website / Commercial Reel: http://colorist-rovak.com/ YouTube Channel / Reels: https://www.youtube.com/user/tomrovak/videos Music Video Reel: https://vimeo.com/208990644?utm_source=email&utm_medium=vimeo-cliptrans…