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Quiz

Safe to delete?

Ten folders from a developer's Mac. Guess what happens to each one if you delete it. The answers are the lines StorageRadar shows before every developer cleanup.

  1. 1 of 10 On my Mac: 4.79 GB

    ~/Library/Developer/Xcode/DerivedData

    Comes back on its own

    StorageRadar says:
    Rebuilt on next build. Your first build after cleaning will be slower.
    Comes back later?
    Yes. Automatically during future builds and indexing.
  2. 2 of 10 On my Mac: 2.13 GB

    ~/Library/Developer/Xcode/Archives

    Some of it is gone for good

    StorageRadar says:
    Builds you already shipped. Removing them loses the dSYMs used to symbolicate old crash reports.
    Comes back later?
    Only partially. New archives appear when you build again, but old archived artifacts are not restored automatically.
  3. 3 of 10 On my Mac: 43.97 GB

    ~/Library/Developer/CoreSimulator

    Some of it is gone for good

    StorageRadar says:
    Removes simulator devices and everything installed on them. Re-created empty by Xcode.
    Comes back later?
    Partially. Devices and caches return over time, but runtimes may require large downloads again.
  4. 4 of 10 Not on my Mac

    ~/Library/Developer/Xcode/iOS DeviceSupport

    Comes back after a download

    StorageRadar says:
    Symbols for devices you attached once. Re-downloaded the next time you connect that device.
    Comes back later?
    Yes. When Xcode needs that device support again.
  5. 5 of 10 On my Mac: 5.28 GB

    ~/Library/Caches/org.swift.swiftpm

    Comes back after a download

    StorageRadar says:
    Re-fetched on the next package resolve.
    Comes back later?
    Yes. Automatically during future package resolves.
  6. 6 of 10 On my Mac: 1.2 GB

    ~/.npm

    Comes back after a download

    StorageRadar says:
    Re-downloaded when needed.
    Comes back later?
    Yes. Automatically during future package installs.
  7. 7 of 10 On my Mac: 1.99 GB

    ~/Library/Caches/JetBrains

    + ~/Library/Logs/JetBrains

    Comes back on its own

    StorageRadar says:
    The next IDE launch may need to reindex projects and rebuild caches.
    Comes back later?
    Yes. Automatically as IDEs reopen your projects.
  8. 8 of 10 Not on my Mac

    ~/.pytest_cache

    Comes back on its own

    StorageRadar says:
    You lose cached test state, but not your project source.
    Comes back later?
    Yes. On the next pytest run.
  9. 9 of 10 On my Mac: 7.23 GB

    ~/.android/avd

    Some of it is gone for good

    StorageRadar says:
    You may lose emulator snapshots, local app state and possibly full virtual devices.
    Comes back later?
    Partially. New devices can be recreated, but deleted snapshots and local state do not come back automatically.
  10. 10 of 10 Not on my Mac

    ~/Library/Containers/com.docker.docker/Data

    Some of it is gone for good

    StorageRadar says:
    Rebuilding images may take a long time and needs network access.
    Comes back later?
    Partially. Build cache and images can return over time, but deleted container or volume data may not come back automatically.

Sizes come from my Mac mini on October 15, 2026. Yours will differ: scan your Mac for free.

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