@smashingsimmer Origin is only out of support in Windows. The Mac version still works, although the EA App for macOS is coming soon.
When you say your packs didn't appear in the launcher, do you mean that the little icons along the bottom of the launcher don't light up, or that you don't see an Expansions & Stuff Packs tab? There is no Packs tab in either Mac version of Sims 3; it only exists for Windows/patch 1.69.
The important question is whether your packs are loading in-game. An easy way to tell is to open Buy mode and try to filter by pack. Click the button on the right of the user interface, and each pack that's loading will show on the list. Count the packs and make sure they're all there. If they're not, let me know.