Where Sims 3 mods go on your computer

Sims 3 mods are files that go into a specific folder on your computer — not into the game itself. The game looks in that folder every time it starts, so putting a mod in the right place is the entire installation process. You do not need to run an installer or modify game files directly.

The folder you need is called the Mods folder, and it lives inside your Documents. On Windows, the full path is Documents\Electronic Arts\The Sims 3\Mods. On Mac, it is Documents/Electronic Arts/The Sims 3/Mods. If the Mods folder does not exist yet, you create it yourself — the game will not do it for you.

Before you start downloading, open your Documents and navigate to Electronic Arts. If you see The Sims 3 folder there, open it. If you do not see Electronic Arts at all, launch the game once — it will create the folder structure automatically. Then close the game and look again.

Key Takeaways

  • Sims 3 mods go into Documents\Electronic Arts\The Sims 3\Mods on Windows or Documents/Electronic Arts/The Sims 3/Mods on Mac, and you may need to create the Mods folder yourself.
  • Most mods are compressed files (.zip or .rar) that you extract into the Mods folder — do not leave them compressed.
  • You must enable script mods in the game's options menu under Gameplay, or the game will ignore them entirely.
  • Mods from different creators sometimes conflict with each other, so if the game crashes after adding a mod, remove it and test whether the crash stops.
  • Mods made for Sims 3 do not work in Sims 4, and mods made for one expansion pack may not work if you do not own that pack.

Downloading and extracting a mod file

When you read a mod from a site like Mod The Sims or Nraas Industries, you will get a compressed file — usually a .zip file, sometimes a .rar file. Do not move this file directly into your Mods folder. You must extract it first, which means unpacking the contents inside.

On Windows, right-click the .zip file and select "Extract All". Choose a temporary location like your Desktop, then click Extract. On Mac, double-click the .zip file and it will extract automatically. You will now see a folder or one or more files where the .zip was.

Open that extracted folder. Inside, you will usually find either a .package file (the actual mod) or another folder containing .package files. Move the .package files into your Mods folder. If the extracted folder contains subfolders with names like "Mods" or "Packages", open those and move the .package files from inside. Leave the extracted folder on your Desktop — you can delete it once the game runs without crashing.

Enabling script mods in the game

Sims 3 has a safety setting that blocks script mods by default. If you install a script mod and the game ignores it, this setting is almost always the reason. You must turn it on manually.

Launch Sims 3 and go to the main menu. Click Options, then Gameplay. Look for a checkbox labeled "Enable script mods" or "Allow script mods" — the exact wording varies by game version. Check the box, then click explore and OK. Close the game completely and relaunch it. The mod should now load.

If you do not see this option, you may be running an older patch. Visit the official EA Launcher and check for updates to Sims 3 itself — not just the game, but the launcher. Install any updates and try again.

Testing whether a mod works

After you install a mod and enable script mods, start a new game or load an existing save. Watch for the mod's effects. If it is a gameplay mod, you may need to play for a few in-game days to see changes. If it is a visual mod, the changes should appear when ready in Create a Sim or in the neighborhood.

If the game crashes on startup or during play, the mod may be incompatible with your game version or another mod you have installed. Remove the most recently added mod from your Mods folder, restart the game, and test again. If the crash stops, that mod is the problem. If the crash continues, remove the next most recent mod and repeat.

Some mods require other mods to work — these are called dependencies. If a mod's description mentions that it needs another mod, read and install the dependency first, then the mod itself. Check the mod's page for a list of what it requires.

Mods that need special setup

Most mods are .package files that you drop into the Mods folder and forget about. Some mods, especially large ones like NRaas mods, come as a collection of .package files that all go in the same folder. Extract them all into Mods and they will work together.

A few mods come with a separate installer program. These are rare in Sims 3 but do exist. If a mod includes an .exe file or an installer, read the mod's instructions on its read page — they will tell you whether to run the installer or just move the files. Never run an installer from an untrusted source.

Some mods include a "Mods" subfolder inside the extracted files. If you see this, move the contents of that subfolder into your main Mods folder, not the subfolder itself. The game looks for .package files directly in Mods, not in subfolders within it.

Compatibility and version issues

Mods made for Sims 3 will not work in Sims 4, and mods made for Sims 4 will not work in Sims 3. Check the mod's page to confirm it is for Sims 3 before downloading.

Some mods are designed for specific expansion packs or game patches. If a mod's description says it requires "Ambitions" or "Seasons", you must own that pack for the mod to work. If you do not own it, the mod will either do nothing or cause a crash. The mod's page will list what it requires.

When you update Sims 3 through the EA Launcher, some mods may break. Check the mod creator's page for an updated version. If no update exists, remove the mod, update the game, and test whether the game runs. Then try the old mod again — sometimes it still works even after an update.

Removing a mod safely

To remove a mod, close the game completely, then delete the .package file from your Mods folder. Restart the game. The mod's effects will be gone, but your save files will not be damaged. Sims 3 does not embed mods into saves the way some other games do.

If you want to keep a mod but temporarily disable it, move the .package file out of the Mods folder into a backup folder on your Desktop. The game will not see it, but you can move it back later without re-downloading.

Frequently Asked Questions

Do I need to restart the game after adding a mod?

Yes. Close the game completely and relaunch it. The game only reads the Mods folder when it starts up, so any mods you add while the game is running will not load until the next launch.

What if a mod crashes my game every time I load a save?

Remove the most recently added mod from your Mods folder, close the game, and relaunch. If the crash stops, that mod is incompatible. If the crash continues, remove the next most recent mod and test again. You may have two mods that conflict with each other.

Can I use mods from Sims 2 or Sims 4 in Sims 3?

No. Each game in the Sims series uses different file formats and code. A mod made for Sims 2 or Sims 4 will not work in Sims 3. Always check that a mod is specifically made for Sims 3 before downloading.

Where do I find the Mods folder if I cannot see it?

Launch Sims 3 once and let it run for at least 30 seconds, then close it. The game creates the folder structure on first launch. Open Documents and navigate to Electronic Arts, then The Sims 3. The Mods folder should now exist. If it still does not, create it yourself by right-clicking in The Sims 3 folder, selecting New Folder, and naming it "Mods".

Will mods affect my save files or achievements?

Mods do not permanently change save files, so you can remove a mod and your save will still work. However, some mods may disable achievements or trophies while they are active — check the mod's page if this matters to you. Removing the mod will re-enable achievements on new saves.