You shouldn’t expect xrun free performance on Linux out of the box.
There’s some homework to do first (rt kernel alone is not enough):
http://wiki.linuxaud…tation_on_linux
Then you can use the Quickscan script to verify your config:
https://github.com/r…configquickscan
This was already discussed in great length:
https://forum.renoise.com/t/linux-priority-too-high/46124
https://forum.renoise.com/t/low-latency-and-xrun-optimizations-on-linux/45002
But yeah, it would be interesting to hear from Mac (and Windows) users how low they can go latency wise - just to have a reference.