Hello again! I briefly used a cleanup (cleanmymac) software for unrelated issues in the past however it has been un-installed from my mac.
I tried the 'disable origin in-game' with no success. However, I tried your second suggestion in safe mode-
I tried to open the game through origin in safe mode, however when I opened origin the normal dashboard (glitched I'm guessing) and inflated to a large size so that it was only showing the bottom corner of the normal dashboard (If there is anywhere for me to attach an image, let me know and I can show you if this does not make sense). I could not try to minimize the dashboard window therefore I could not launch the game through origin.
So since trying to launch the game through origin in safe mode does not work, I tried to launch the game from my applications folder. When doing so, two separate error messages appeared one after the other-
"The sims 4 startup error
Unable to migrate the user data directory to legacy edition. The sims 4 legacy edition will continue with new data. Visit help.ea.com for more information"
and
"Unable to start
Unable to start due to missing game data. Please download The sims 4 legacy edition from origin.
[5de4b8a3:29f00e76:00000000:00000000]"
I never launch my game from my applications folder, rather through Origin, so out of curiosity I tried to see if I would get the same error message launching the game from my applications folder NOT during safe mode. When doing so, these error messages did not appear. The game launched as usual and experienced the same problem of being stuck on the loading screen.