OK, as a mac user and having run this in testing for a long while, here's what I recommend.
Set the following changes:
1: Frequency - 44100hz and don't bother any higher, you don't need anything more than that
set latency to 256 and test with full note range, if glitchy, try 512 samples and that should do fine,
final setting is this. polyphony limit, set this to 512 notes max,
these are the settings I use on any test mode, I never change polyphony limit below this but if there's a glitch, it's usually to do with the audio interface.
Now, MacOS is a bit of a fickle beast and there's things you can do to handle how MacOS behaves, one tool I swear by is Onyx for mac, you need to use specific versions for each OS as they're tailored.
If you're running Organteq on an older mac, ram upgrade would help you especially if you've upgraded the OS to the max it can support, because each MacOS changes it's needs for systems and sometimes you might find it choking.
thank yourself lucky you're not runnning hauptwerk.
For me, when ever I set up a mac as a clean mac, the first thing I do after running updates and configuring the OS, I install Onyx, then I go through, customise the UI to remove certain processes, etc, then do a full disk clean to remove any rubbish, etc, reboot it, pram flash it, then it's ready to go, that's coming from a former apple engineer.
lew
Blind Music Producer, Composer, pianist and Church Organist. Accessibility development specialist for MacOS. Developing a solution for blind organists to have an accessible digital organ solution.