Walked to an outpost with my knights. Room internals are dark as usual. Smacked the wall and enemy pawns started coming out. I wedged the door open with their corpses and stormed in. But I couldn't see anything because the room stayed dark until I broke the door.
I expected something different when I read "Dark Room At Outpost" ;D
Not only at Mac OS.
To reproduce:
attack an outpost.
kill a raider on a door so it stay open, so corpse let the door force open.
Or follow a raider inside.
The room don't got revealed when you move past the door.
Has been fixed some time ago: https://ludeon.com/forums/index.php?topic=46382.0
Thanks for reporting anyways! ;)