Multiple displays work for me, but some features seem half-baked.
I am a heavy user of Spaces and for the life of me, I haven't found a way to regain access to Spaces that I've moved to an external display once I disconnect it from my macbook.
I am a heavy user of Spaces and for the life of me, I haven't found a way to regain access to Spaces that I've moved to an external display once I disconnect it from my macbook.
This utility might help you see what's going on: https://github.com/Jaysce/Spaceman.
And while we're on Spaces, this utility forces mission control to show full thumbnails of all spaces by default: https://github.com/briankendall/forceFullDesktopBar