High CPU usage on Mac is due to a macOS-specific QT5 problem with the Track/Playlist screen and scrolling/interacting with it when on a high resolution display (such as your Retina screen on your MacBook) - you should find that CPU usage will drop and performance will noticeably improve if you resize your Strawberry window to something very small.
I did have an issue ticket raised on this issue on the Strawberry GitHub page, which was closed as it was deemed to be unresolvable under QT5, and I'm trying to get it reopened/looked at again, now that QT6 has been released (which may have a fix for this CPU usage/performance issue).