I have just bought a second hand late 2014 4.0GHz i7 iMac and am having problems. With only a tiny track count of 2 or 3 VST instruments I’m getting massive “real time peak” meter readings. The setup is new with all the latest software versions of DAW and plugins.
Native Instruments Komplete 11
d16 Group instruments
Metric Halo MH2882 Audio Interface with MIO console software.
I couldn’t find the correct location to lodge a support request as the pages seemed to go around in circles
Loading up the 2nd or 3rd instrument send the meter over 50% . taking it out drops again, but putting a different one back in causes the same problem. Its no one particular instrument or vendor causing the problem.
I tried the terminal hack to turn off GPU acceleration which worked once, but then new instruments set it off again…
The performance is much worse than the 2.3Ghz i7 MBP I have running here too.
The real time performance meter will show a lot of activity, even when activity monitor shows little load… the red light is constantly on at the end of the meters and the sound quality is deteriorating fairly quickly even with a big buffer size.