@deevineee Your custom content files need to be unzipped and placed in your mods folder for them to work; you also need to check the box in game options to allow script mods. Here's a guide with a couple of screenshots, in case it helps:
https://bluebellflora.com/itsaprilxds-how-to-install-mods-on-a-mac-guide-the-sim-4/
If your cc still doesn't show up in-game, it might be worth rebuilding your TS4 game folder, just to make sure there's nothing wrong with your existing one. If you pull it out of Documents and onto your desktop, a clean folder will spawn the next time you launch the game. Place just one package file in this new folder and then load a new save to see if the cc appears. If it does, you can add a few more files, check whether they work, add another batch, etc. Keep in mind that some custom content may be incompatible with the latest patch and may prevent all of your cc from showing up in-game. In this case, you'll need to either download the latest version of the file or not use that item at all.
Also, just so you know, the TS4 developers never come around here. Responders are mostly your fellow players, with the occasional EA community manager thrown in. So if you want to provide feedback on your game experience, you'll have better luck using other channels.