I'm using PT 11 HD on a very expensive MAC PRO 12 Core D700 1TB 32GB HD OMNI
10.10.5 OSX and having memory error with over 16 GB of free memory. Less then 10 GB has been used at it throws the low on memory error.
I'm still getting CPU errors as well, even with my 12 Core processor, including random beach balls and hangs.
We already optimized everything and have a clean install, removed all but Kontakt and PLAY plugins, trashed prefs, etc. etc.
This problem has been going on since PT 9X