On the left side of the screen, look for Advanced menu and make sure that the Include Custom Content box has a check mark in it to see creations that include CC. Open the Gallery (F4 key shortcut) and select the My Library tab. It is on by default but you can use the command 'tm.moveobjects off' to disable it.

To enable, go to game options > other > and check the Script Mod box and restart TS4. Then open Windows Explorer on PC, or Finder on Mac, and locate Electronic Arts > The Sims 4 > Mods. To install, simply copy 'tmex-moveobjects.zip' into the Mods folder. To install the best Sims 4 mods in your game, all you initially need to do is download the mod file. MoveObjects On - Some house creations require this script in order to place the lot properly. Simply refresh your Library and it will appear right away. You don't have to restart the game every time you install a new creation. After you copied the files in their designated folder, the downloaded content are ready and now available for use in game.

You will also see a config file named Resource.CFG, which basically allows users to add third-party content. package format should be placed inside the Mods folder.

How to install mods the sims 4