We have a new Mac specific bug that’s popped up since the November patch, game version 188.8.131.520.
If you play with laptop mode off you will see a weird straight line shadow following your Sim around when they are inside:
A workaround at the moment is to enable laptop mode in your game. You could also go into the GraphicsRules.sgr file and change the RenderShadowsEnabled value to false but enabling laptop mode is a lot quicker and easier. You may get the awful pink floors bug back though so you decide which is worse!
We have a thread over at AHQ so please do take a minute to press the Me Too button so EA are aware of how widespread it is. If you have a minute I’d really appreciate it if you could please post your Mac model too and version of macOS – https://answers.ea.com/t5/Bug-Reports/Mac-Sims-cast-weird-shadows/m-p/7178640