So much this! I use a lot of audio programs, and this was the single most stable and solid version of MacOS X for my purposes. I should have just stayed there.

So much this! I use a lot of audio programs, and this was the single most stable and solid version of MacOS X for my purposes. I should have just stayed there. Now I'm contemplating whether I want to migrate my 8-year-old Mac Pro to El Capitan and wondering if it will break Aperture completely.