Since the April ’19 patch some Mac users have reported pixelated, blank and greyed out menu items, notification walls and other UI issues. Normally this would be related to an out of date UI mod but not all users have CC/Mods so it is possible this could be a new Mac bug.
If you are experiencing this, and can completely discount CC/Mods for causing the issue, please post in this thread over at Answers HQ – https://answers.ea.com/t5/The-Sims-Mac/POSSIBLE-BUG-UI-glitches-and-greyed-out-menus-after-April-patch/m-p/7819322#U7819322
Edit 18/06/19 – Cheezyeen and verfens have confirmed in the thread that allowing the game to run through the loading screens (Maxis/EA/Sims4 intros) and NOT clicking them to load the game more quickly stops this issue from happening.
Bluebellflora 