Hello. Ok. So I bought an iMac inbetween 2010-2012. I never updated the version because I only bought it to work with Pro Tools. A couple of days ago I for some reason updated to El Capitan, but Pro Tools 8 does not work with El Capitan. Is there anyway to 'go back' to Snow Leopard? That's apparently the only OS X that works with Pro Tools. I know; i didnt create a backup in my timemachine so I could go back. I've tried erase everything on the mac, but it still loads up in Capitan. Lastly; my CD-rom doesnt work. So I cant put any cd's in wich eliminates that option... Thank you.