I have a stock version of KSP 1.2.1 with Mac OS Sierra 10.12.2. When I double click the KSP executable, it loads but the loading takes ages. I've let this go for over 30 minutes and I can see stuff is progressing but nothing is happening. I played this on my computer about a year ago with no issues so I can't tell if it is a problem with the OS or KSP. Has anyone run into this?