After the latest 4.10.0.75689 update on OS X 10.11.6 SC2 starts with notice that the OS won’t be supported and after continuing the game launches but is completely invisible/transparent/no UI. I can hear it logs in, I see custom game cursor, I can F10 to enter menu and everything but I cannot see the game at all (tabbing in and out, relaunching does not help). This error was introduced in the latest update.
Edit: After further tests I was able to get the game working by switching to different app and than alt clicking SC2 in the Dock (or holding alt while apple+tabbing). Very weird issue.