l4zsowu48t12 Any .package file needs to go into ...The Sims 3 > Mods > Packages, with a Resource.cfg file directly inside Mods (not in Packages). And both the Mods and Packages folder names need to be capitalized, exactly as I've written. Please make sure you've done all of this.
If that's not the issue, please post a screenshot of the contents of the Packages folder so I can take a look. Please also right-click one of the files inside and select Get Info, then post the file path you see in the pop-up, under Where. You can write [username] instead of your actual username if you want.