Thanks, that did the trick.
Are you able to explain a little but about what Disabling CPU Power Management does, as well as Enable Safety Offset? I'm using OS X 10.10.5 and trying to get the most out of Pro Tools.
I get the feeling that my Mac might be a little stressed. It's a 3.5GHz i7 iMac with 32GB RAM. Solid State hard drive for the OS and external Solid State drives for the audio.
The bummer is that it was one of the last Thunderbolt 1 iMacs.
In one TB port, I have an OWC Thunderbolt 2 dock which feeds the Sonnet Echo Express III D containing my Lynx AES16e card, UAD Octo Card, and a FW/USB card that normally has nothing connected to it.
From there, I'm coming out of the Sonnet Echo Express to feed a Phillips TV as an extra display using a TB to HDMI cable. The OWC Thunderbolt 2 dock also feeds a 55" Samsung TV via the HDMI output which is used as my main display.
The other TB port is feeding a Blackmagic Multidock with the external SSDs.
The computer itself also has a few dongles for iLok, Steinberg key, and Weiss Saracon dongle.
Other peripherals include an Apple wired USB keyboard, Apple USB Superdrive, bluetooth Apple Magic Mouse.
I think that's it. Despite all this, I never hear the iMac fan kick on so I feel like the iMac can handle it, but when I'm working in Pro Tools and start inserting plugins on more than a couple tracks, I get a huge CPU spike for a few seconds and Pro Tools won't playback audio until the spike settles down. I get error message AAE -9173
Also, sometimes the playback won't stop and give that error message, but the playback audio is full of crackles and pops until things settle again after inserting a plugin or using another app that might cause a CPU spike.
I'm thinking of upgrading computers but waiting to see if Apple refreshes the Mac Pro.