I have my Mac mini 2011 connected to a projector via Thunderbolt>HDMI. Until today, colours looked fine. After a restart (I believe which installed a security update) the color profile that's loaded after login looks awful. However, colours are fine at the login screen. I've switched between all the color options in system preferences to no avail. The profile persists after a log out, but if I restart, looks good again until I'm logged in. Any way to figure out the profile that's running after a restart, and make it persist?