Too many issues with my Imac 27" mid 2010 intel I7, computer chrashes all the time, go to sleep and no comeback ( like it was shutdown ), imcompatible software like plex server, itunes, parallels access, etc, so i went back to the El capitan beta and everything running great so far, i was thinking that was the computer, but this version is too buggy or my Imac is too old to running 10.12