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. Extract the mod from the downloaded file and copy the. Use the Finder program to locate the Mods folder (Documents/Electronic Arts/The Sims 4/Mods). Open the Gallery (F4 key shortcut) and select the My Library tab. Download the mod you want from the internet. 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. To install, simply copy 'tmex-moveobjects.zip' into the Mods folder. 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. A quick overview how to modify Sims 4 using MC Command Center as an example. After you copied the files in their designated folder, the downloaded content are ready and now available for use in game. - Please note that all Sims 4 modding will take place in the Sims 4 folder within your My Documents directory under Electronic Arts.
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.