When placed inside of the Strive foder in Application Support, they appear in the in-game menu, but when activated they have no effect whatsoever. Any idea how to fix this? Maybe I'm not placing the mods in the right place?

MacOS stores game script files differently than Windows or Linux.  Nobody has provided a script that can modify the files on MacOS, therefore you cannot mod the game as is.  I don't have a MacOS so it's a bit out of my reach, but maybe someone will find a solution.