Just trying to get myself familiarized with Rhino Mac and Magic Mouse, here are a few suggestions for a better navigation experience in the Mac version.
Zoom in Rhino - feature to turn on/off smooth scrolling: with the Mac-native smooth scrolling on, the delicate zoom control is extremely difficult. (Sometimes, scrolling doesn’t work at all in both Rhino 7 Beta and 6 - strange… ).
Zoom in Grasshopper - zoom with scrolling will be very helpful (with smooth scrolling feature as well).
Three fingers tab for a middle button click - for beloved pop-up menu (on both Grasshopper and Rhino).