One of the problems is that people seemed to have 8.0.3 working fine on the public betas - but somewhere between those and the actual 10.11 public release, something must have been changed because everything broke. My version is bricked, and won’t even open - but I knew I was looking for trouble taking the advice of the beta users and upgrading wholesale before checking that it was officially supported. FTR I’ve had to wait 3 weeks for the 10.11.1 release to un-break my NI plugs so I could use Logic - and a lot of pain would have been saved if I’d just checked the official announcements first rather than diving straight in, because 8.0.3 was running sweet as a nut.