Grasshopper Interface in Rhino 6 for Mac

Jut upgraded and still getting a feel, but some changes I am wondering if I can restore/revert:

  • Space bar to toggle context menus (eg to preview, etc), which now just says "SearchH
  • Getting it off “dark mode”, since I have a big Mac monitor and darkmode with small icons makes it almost impossible to see whats on the toolbar tabs

Can this be done?