Check 'Enable Custom Content and Mods' under Game Options > Other.
Start The Sims 4 and open your Options menu.
package files inside into the Sims 4 'Mods' folder. package files or an unzipped folder with. Here's what you'll need to do to install and play with your Sims 4 CC:
(Image credit: Electronic Arts, Maxis) Where is the Sims 4 CC folder?
