@ToxicViolets It almost certainly matters that you're playing on a Mac. Please also list your computer's full specs: everything under About This Mac except for the serial number.
You could try playing with the graphics settings a bit to see if you get different results, for example using the default ultra profile (where it says Custom in your screenshot) or disabling post processing. I can't see whether you have laptop mode enabled—you'd need to scroll down a bit—but if so, definitely disable it first. It's supposed to be for low-end machines, and when it's enabled, the game cuts a lot of corners with rendering.
If the above doesn't help, you may be better off asking on a dedicated creators' forum, for example the one at Sims4Studio. I'm not aware of any issues with alpha cc and macOS, and the other Mac person I asked isn't either, but cc creators would have a better idea.
I've moved this thread to the general discussion section since it's not a PC tech issue and probably not a problem with your Mac itself.
I’m on a pc, but I also get this issue and it’s so annoying because I really want to play with alpha cc as I don’t really like maxis hair as much.
@bonbonbumblebee Try playing with sim detail on ultra and see whether that makes a difference.
