TidyMacCoreSimulator holds every iOS, watchOS and visionOS simulator Xcode has created, with its apps and data. Old simulators stay after Xcode updates. Run xcrun simctl delete unavailable to remove the ones your Xcode can no longer use; keep working ones that may hold test data.
Location: ~/Library/Developer/CoreSimulator
What’s inside
- Devices: one folder per simulator
- Caches
- Runtime volumes (managed by Xcode)
Clean it safely
xcrun simctl delete unavailable
Find every folder like this on your Mac
TidyMac lists big folders outside its library, checks which app owns each one and whether that app is still installed, and explains it.
Frequently asked questions
Can I delete CoreSimulator?
Check first: This may be the only copy of something. Look at the details before removing. CoreSimulator holds every iOS, watchOS and visionOS simulator Xcode has created, with its apps and data. Old simulators stay after Xcode updates. Run xcrun simctl delete unavailable to remove the ones your Xcode can no longer use; keep working ones that may hold test data.
Where is CoreSimulator on my Mac?
~/Library/Developer/CoreSimulator. In Finder choose Go › Go to Folder and paste the path.
How big does CoreSimulator get?
Usually 2 – 40 GB.