Is it safe to delete Simulator discarded app data?
Data from apps you reinstalled or removed in a simulator, which the simulator set aside to delete but kept.
Safe
Its owner recreates it by itself when it needs it, and nothing you made is lost.
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What it is
When you reinstall or remove an app in a simulator, for example by running it again from Xcode, the simulator can move the app's old data into a folder named Dead to delete later. Developers have reported that these folders aren't always emptied, even after a restart, and can reach many gigabytes. The current data of your apps isn't stored here.
If it's removed
None for the apps and data you're using. Only data the simulator had already discarded is removed.
How it's removed
Moved to the Trash, where you can restore it. Quit Simulator first.
The free analyzer finds it and explains it. Removing it is Pro, after a review sheet that lists every move and command. It starts checked in the Cleanup checklist, except inside Documents or Desktop.
Sources
Last checked on 26 Sep 2026. Every entry is written and checked by hand; the app and the command-line tool use the same words.