BOUGHT Sims 4 DLC Greyed Out - 'Available on Windows' Error (Worked on Origin)

When I switched over to Mac I was able to download and install the content that came with the Digital Deluxe version of the game from back when I originally bought it in late 2014-early 2015 through Origin on Windows.

I can't remember now the specific date, since it was so long ago, but I was able to use it with my Mac game, however since the switch, it's showing with the EA App that this content is only available on Windows and I've completely lost access to it.