Hi Just downloaded 1.2 and installed fresh from the zip on OS X macOS Sierra. Previous versions have loaded within a few seconds but this one won't load at all, it's stuck at the nice pictures with 'Loading Asset Bundle Definitions' written at the bottom and the Kerbally messages scrolling forlornly over and over. I've heard that Unity might have some issues with Sierra, is it just me or is this a known problem?   Cheers!   Edit: Found the answer, moving the KSP app