Just found a solution that worked for me! Last post here: Lost hot keys and other glitches on Mac - #2 by Sturmgott-2893
TLDR hit Shift+command+G in Finder to open the “go to folder” dialogue, type in ~/Library/Application Support/Blizzard/ and then right-click on the StarCraft II folder, click Get Info, and change the Sharing & Permissions privileges to “Read & Write” (I did it for every user just in case). Worked for me immediately. Didn’t even need to restart StarCraft II.