Mar 6, 2026 Last updated on Mar 5, 2026 · 11 min read

LETS MOD: How to Install Mods and Custom Content in The Sims 4

Want to transform your Sims 4 game with thousands of new hairstyles, clothes, furniture, and gameplay features? Mods and custom content (CC) unlock a whole new world beyond what EA gives you in the base game.

The Sims modding community has created incredible content, from realistic career systems to stunning furniture sets to game changing quality of life improvements. And the best part? Installing mods is way easier than you think.

In this guide, I’ll walk you through everything you need to know about installing mods and custom content in The Sims 4. Whether you’re completely new to modding or just need a refresher, this tutorial will get you up and running in about 15 minutes.

What you’ll learn:

• The difference between mods and custom content

• Where to safely download mods and CC

• How to find and organize your Mods folder

• Step-by-step installation process

• How to enable mods in-game

• Troubleshooting common issues

What you’ll need:

✅ The Sims 4 (PC or Mac version)

✅ About 10-15 minutes

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Understanding Mods vs. Custom Content

Before we dive into installation, let’s clear up a common source of confusion: What’s the difference between mods and custom content?

What is Custom Content (CC)?

Custom content refers to cosmetic items created by community members that add new assets to your game. Think of CC as new stuff for your Sims to use:

• Hair and clothing - Thousands of new hairstyles, outfits, shoes, and accessories

• Makeup and skin details - New makeup options, skin overlays, and facial features

• Furniture and décor - Custom furniture sets, wall art, plants, and decorations

• Build mode items - New windows, doors, flooring, wallpaper, and other elements

Custom content is generally safe, easy to install, and doesn’t change gameplay mechanics. It just gives you more options to customize your Sims and their homes.

What are Mods?

Mods are files that change how the game works. Mods add new features, systems, and gameplay mechanics:

• MC Command Center - Adds story progression, population control, and tons of cheats

• UI Cheats Extension - Lets you modify needs, skills, and relationships with simple clicks

• Career overhauls - Realistic career systems with new interactions and progression

• Relationship and romance mods - Deeper social interactions and relationship mechanics

Mods are more complex than CC and can conflict with game updates. When EA releases a patch, mods often need to be updated by their creators.

Many players use both! You might download custom hair and clothes (CC) alongside gameplay mods like MC Command Center.

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Where to Safely Download Mods and Custom Content

Only download from trusted sources. Here’s where to find quality, safe mods and CC:

Mod The Sims - Long-standing community site with both mods and CC. Quality submissions with active forums.

Patreon Creators - Many talented creators offer early access on Patreon, with free public releases later.

Tumblr Creators - Lots of CC creators share their work on Tumblr.

Sites to AVOID

❌ Sketchy ad-heavy sites with multiple pop-ups and redirects

❌ Sites requiring surveys to download files

❌ Sites with suspicious “download” buttons that might be ads

❌ Anything asking you to disable antivirus software

Red Flags to Watch For

🚩 .exe files - Sims mods should be .package or .ts4script files, never .exe

🚩 Sites that re-upload others’ content - Always download from the original creator when possible

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Finding Your Mods Folder

The Sims 4 stores all mods and custom content in a specific folder on your computer. Here’s how to find it:

Windows

Step 1: Open File Explorer (Windows key + E)

Step 2: Navigate to: Documents > Electronic Arts > The Sims 4

Step 3: Look for a folder called “Mods”

Step 4: If the Mods folder doesn’t exist, create it:

• Right-click in the empty space

• Select New > Folder

• Name it “Mods” (capital M)

Mac

Step 1: Open Finder

Step 2: Go to: Documents > Electronic Arts > The Sims 4

Step 3: Look for a folder called “Mods”

Step 4: If the Mods folder doesn’t exist:

• Right-click (or Control-click) in the folder

• Select New Folder

• Name it “Mods”

Important: Don’t nest folders too deep! The game can only read mods that are 1 subfolder deep.

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Installing Mods & Custom Content (Step-by-Step)

Now for the main event! Here’s exactly how to install mods and CC:

Step 1: Download Your Mod or Custom Content

Find something you want to download from a trusted site and click the download button. The file will usually be a .zip or .rar file and will save to your Downloads folder.

Step 2: Extract the Files

Windows:

• Navigate to your Downloads folder

• Right-click the .zip file

• Select “Extract All…”

• Click Extract

Mac:

• Navigate to your Downloads folder

• Double-click the .zip file (it extracts automatically)

What you’re looking for:

Inside the extracted folder, look for files ending in:

• .package (most common for both CC and mods)

• .ts4script (for script mods like MC Command Center)

You might also see:

• .txt files (read these! They often have installation instructions)

• .png files (preview images, you don’t need these)

Step 3: Move Files to Your Mods Folder

For .package files:

• Can go directly in the Mods folder OR

• Can go 1 subfolder deep (like Mods > Hair > file.package)

For .ts4script files:

• MUST be in the Mods folder root OR

• Only 1 folder deep maximum

• Never nest .ts4script files deeper! The game won’t read them.

Example Folder Structure

Mods/
├── Hair/
│   ├── creator1_long_hair.package
│   └── creator2_short_hair.package
├── Clothing/
│   ├── dress_set.package
│   └── shoes_pack.package
├── Gameplay/
│   ├── MC_Command_Center.ts4script
│   └── MC_Command_Center.package
└── Build_Mode/
    └── furniture_collection.package

Important Notes

⚠️ Delete the .zip file after extracting (optional, but keeps your Downloads folder clean and saves space)

⚠️ Read the creator’s instructions! Some mods have specific installation requirements

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Enabling Mods In-Game

You’ve installed the files, but there’s one more crucial step: enabling mods in your game settings.

Step 1: Launch The Sims 4

Open the game and wait for it to load to the main menu.

Step 2: Open Game Options

Click the three dots (…) in the top right corner, then select “Game Options”

Step 3: Navigate to “Other”

In the left sidebar, click “Other”

Step 4: Enable Mods and CC

Scroll down and check these two boxes:

✅ “Enable Custom Content and Mods”

✅ “Script Mods Allowed” (essential for gameplay mods!)

Step 5: Apply and Restart

Click “Apply Changes” at the bottom.

The game will show a popup saying it needs to restart. Click “OK” and let the game restart.

Step 6: Verify Your Mods Loaded

After the game restarts:

• You’ll see a list of your installed mods/CC

• Check for any error messages or warnings

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Testing Your Mods and Custom Content

Testing Custom Content

For Hair, Clothes, and Makeup:

1. Create a new Sim or load an existing household

2. Enter Create-a-Sim (CAS)

3. Look for your new items. They’ll have a wrench icon in the bottom right

4. You can filter by “Custom Content” using the filter dropdown

For Furniture and Build Items:

1. Enter Build/Buy mode

2. Look for the wrench icon on new items

3. Use the Custom Content filter to see only CC

Testing Gameplay Mods

Load into a household and look for:

• New computer interactions (MC Command Center adds options here)

• New phone interactions

• Modified game behaviors

• Mod-specific menus or notifications

What If Nothing Shows Up?

Check these common issues:

✓ Did you restart the game after enabling mods?

✓ Are mods enabled in Game Options > Other?

✓ Are your files in the correct folder?

✓ Are your files too many folders deep?

✓ Did you extract the files from the .zip?

If you checked all of these and mods still don’t appear, see the Troubleshooting section below.

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Troubleshooting Common Issues

Issue 1: Mods Don’t Show Up In-Game

Possible Solutions:

✓ Verify mods are enabled - Game Options > Other, check both boxes

✓ Check folder location - Files must be in Documents > Electronic Arts > The Sims 4 > Mods

✓ Check folder depth - Files can only be 1 subfolder deep (.ts4script files especially!)

✓ Restart the game completely (close and reopen)

✓ Check file format - Make sure you extracted files from .zip (the game can’t read .zip files)

Issue 2: Game Won’t Launch or Crashes on Startup

Possible Solutions:

✓ Remove recently added mods - Move new mods out of the folder and test

✓ Check for outdated mods - If EA just released a patch, mods may be broken

✓ Look for conflicts - Two mods editing the same game feature can cause crashes

Issue 3: “Script Error” or “Mod Conflict” Message

Possible Solutions:

✓ Update your mods - Visit the creator’s website for the latest version

✓ Check patch compatibility - Read the error message carefully for clues

✓ Remove conflicting mods - The error message may tell you which mod is problematic

Issue 4: Custom Content Shows as Broken or Missing

Possible Solutions:

✓ Check for required mesh files - Some CC needs a “mesh” file from another download

✓ Download the mesh - Usually linked on the CC download page

✓ Verify all files extracted - Make sure you didn’t miss any required files

Issue 5: Game Runs Slowly or CAS Takes Forever to Load

Possible Solutions:

✓ Too much CC - Thousands of CC items slow down loading

✓ Remove unused items - Delete CC/mods you don’t actually use

✓ Merge .package files - Use Sims 4 Studio to merge files (advanced)

✓ Clear cache files - Delete localthumbcache.package from your Sims 4 folder

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Best Practices & Maintenance

Keep Your Mods Updated

After every EA game patch:

• Check if your mods need updates (especially script mods)

• Follow mod creators on social media for update announcements

• Major mods like MC Command Center usually post updates quickly

Backup Your Mods Folder

Create a backup:

• Copy your entire Mods folder to an external drive or cloud storage

• Makes recovery easy if something breaks

• Helpful when reinstalling the game

Read Patch Notes

When EA releases a new patch:

• Wait a few days before playing with mods

• Let creators update their mods first

• Check mod websites for compatibility information

Start Small

Don’t install 100 mods at once!

• Add a few mods/CC at a time

• Test after each addition

• Makes troubleshooting much easier

Must-Have Mods for Beginners

If you’re new to modding, start with these beginner-friendly options:

MC Command Center - Swiss Army knife of Sims mods. Story progression, population control, and tons of useful cheats.

UI Cheats Extension - Right-click on needs, skills, and money to modify them. Super convenient!

Better BuildBuy - Improves the Build/Buy catalog organization. Makes finding items easier.

More CAS Columns - Displays CAS items in more columns. Essential if you have lots of CC!

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Conclusion

Congratulations! You now know how to safely install and manage mods and custom content in The Sims 4. Here’s what you learned:

✅ The difference between mods and custom content

✅ Where to safely download mods and CC

✅ How to find and organize your Mods folder

✅ The step-by-step installation process

✅ How to enable mods in-game

✅ How to troubleshoot common problems

What’s Next?

Start small: Download a few simple CC items or one beginner-friendly mod like MC Command Center.

Test everything: Make sure each addition works before downloading more.

Join the community: The Sims modding community is friendly and always happy to help!

Have fun: Modding opens up endless possibilities. Experiment, explore, and make The Sims 4 truly yours.

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