3D & CAD
Clear Unreal Engine Cache on Mac
To clear the cache, remove the contents of the DerivedDataCache folder located in Application Support. This process recovers disk space without affecting your personal project files.
Clear the Unreal Engine cache without guessing
Unreal Engine data usually takes 5 GB – 200 GB on a Mac. The free scan shows the exact size on your Mac before you change anything.
Free scan · No account · Nothing is deleted without your OK · Moves to the Trash first · macOS 14+
OptiClear is a Mac app. Copy this page's link and open it on your Mac.
Email me the link- Application
- Unreal Engine
- Typical data size
- 5 GB – 200 GB
- Category
- 3D & CAD
- File Location
~/Library/Application Support/Epic/UnrealEngine
Unreal Engine cache folders you can clear
These folders are rebuilt automatically, so removing them does not touch your own files.
Locations are the standard macOS folders Unreal Engine uses; some appear only after you use the matching feature.
Understanding the Unreal Engine cache
Specific to Unreal Engine
The app stores a shared derived data cache that can grow to tens of gigabytes after you work on multiple projects. Total data usage typically ranges from 5 GB – 200 GB. Clearing this specific folder helps when storage becomes low or performance issues arise. Unlike project folders, this shared cache is designed to be rebuilt automatically.
After clearing Unreal Engine data
Once deleted, the app will reconstruct necessary files the next time you open a project. You will experience a slower first start because the system must regenerate the cached data. Your Epic account remains linked via the launcher, so you do not need to sign in again. Only the temporary derived data is affected, leaving engine versions and vault assets intact.
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- Account and sync
- Unreal Engine is installed through the Epic Games Launcher with an Epic account.
Try it without risk
- Download and scan for freeSee every Unreal Engine file and its size. No account needed.
- Clean free for 7 daysStart the 7-day free trial of the yearly plan inside the app.
- Keep it or cancelCancel in your App Store settings at least 24 hours before the trial ends and you won't be charged.
After the free trial, Pro costs $39.99 per year in your country's App Store; cancel any time.