This is happening to me as well. I have a Mac and after patch 4.10.0:
**crashes every single time after a game
**doesn’t save replays
**crashes when toggling between windowed mode
Posts expressing the same issues, please post to them to increase visibility so that this issue gets resolved quickly:
https://us.forums.blizzard.com/en/sc2/t/crashes-after-patch-4-10-0/2243
https://us.forums.blizzard.com/en/sc2/t/mac-crashes-after-every-g