Yo! The new build I just pushed out today should resolve this issue. The ideal sample rate for Mac seems to be 22050 to flawlessly play sounds back (without a drop in quality, as far as I can hear on my test Mac). If you have a project you've already saved, then you'll have to adjust the sample rate to 22050 in the project settings, but if you create a new project, it should default to 22050 automatically.