10.4 requires at least Sierra and some features require High Sierra; like 360 video and new HEVC codecs.
So no, El Capitan not supported.
Guess it is time to update for me as well.
Really looking forward to the enhanced Color corrections in 10.4.
For those on HS, would appreciate hearing about experiences using 10.4 and if it fixes issues.
Happy Editing, Greg
Made a clean install of HS today. First of all: it just took just some 10 minutes, all in all. Then ~45 min for all apps to load (part of Adobe CC too).
Existing libraries need to be conformed - no turning back.
My only plugin - Neat - works.
Everything seems fine. Made the color wheels the new standard tool which cmd 6 evokes. You can customize shortcuts for the others (empty entries in command editor). Love the responsiveness of the curves and wheels. HSL curves are great. That's all I can say for one hour.