Trying to install Fortnite on your Mac, but keep running into the dreaded IS-DS01 error? That usually means one thing — not enough disk space. Don’t worry, you’re not alone. This is a common issue and thankfully it’s easy to fix. Grab your llama plushie, and let’s jump into the solution!
💥 What Does IS-DS01 Mean?
The IS-DS01 error pops up when the Epic Games Launcher can’t install Fortnite because your Mac doesn’t have enough free space. Even if you think there’s plenty left, Fortnite is picky. It needs extra room to unpack files during installation.
✅ Quick Fix Checklist
To get past this error, follow these simple steps. We’ll clean up your Mac and make room for Fortnite fun!
1. Check Your Free Space
- Click the Apple logo in the top-left corner.
- Select About This Mac.
- Go to the Storage tab.
You’ll see a color-coded breakdown of your storage use. Fortnite needs at least 40 GB free, sometimes more. If you don’t have that, time to declutter!
2. Delete Unneeded Files
- Empty the Trash.
- Clear out the Downloads folder.
- Remove unused apps from the Applications folder.
- Delete old videos, large files, or duplicate photos.
Focus on files you haven’t used in a while. Trust your gut — if you forgot it was there, you probably don’t need it!
3. Use a Cleanup Tool (Optional but Fun!)
If you’re lazy (join the club), apps like CleanMyMac X or DaisyDisk can do the work for you. They search deep into your system and find big, junky files hiding away.
4. Move Files to External Storage
- Plug in a USB drive or external hard disk.
- Move large files like videos, full-sized games, or photo libraries there.
You’ll clear space fast and keep your Mac happy!
5. Restart Your Mac
A classic move! Once you’ve cleared up enough space, restart your Mac. This helps the system refresh and re-read the available storage.
6. Try Installing Fortnite Again
Open Epic Games Launcher and try installing Fortnite again. It should breeze through this time. If it doesn’t, read on for extra tricks.
🛠 Still Seeing the Error? Try These Pro Tips
Check for Leftover Game Files
If you tried installing Fortnite earlier, you may have partial files hogging space.
- Open Finder and go to ~/Library/Application Support/Epic.
- Look for any Fortnite folders and delete them (carefully!).
Reinstall Epic Games Launcher
Sometimes the launcher itself gets buggy.
- Delete the Epic Games Launcher.
- Download the latest version from their website.
- Install it fresh and try again.
Use the Right Install Location
Make sure Fortnite is being installed on your internal drive, not an external one or odd partition. It runs best where the system lives.
🎉 Done and Ready to Drop Into Battle
You’ve cleared up the mess, restarted your Mac, and reinstalled Fortnite like a boss. No more IS-DS01 errors for you. Just make sure to keep an eye on your storage — Fortnite updates are often chunky little monsters!
Now grab your glider and let the Victory Royales begin!
