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I noticed that this directory:
/Users/$USER/Library/Developer/Xcode/UserData/IB Support/Simulator Devices
contains some rather large directories on my Mac:
$ du -d1 -h | sort -h
...
1.7G ./A7F495BF-B286-4A8B-83A7-7E3D32A237AE
2.4G ./E9F53010-C7A9-469D-8859-D482D6D334FC
5.9G ./E85370F1-3126-4679-AA61-35DCAA6B7871
9.8G ./56FB0674-0DA8-41BA-BA0D-0398CF2139A1
22G ./9F55C8ED-15A2-4FF7-8052-BA4464B290F9
32G ./3CA6DF23-014A-4939-9B5F-9039655B8D03
Digging a little deeper, 3CA6DF23-014A-4939-9B5F-9039655B8D03/data/tmp contains a lot of *.uicatalog files.
These UUIDs do not show up when I run xcrun simctl list.
Does anyone know what creates these files, and if it's safe to delete them?
503
To delete individual, available, simulators it's easier to do so through Xcode. Go to Window > Devices and simulators, then select the Simulators tab. You can right-click on any simulator and select 'delete' to get rid of it.
There is also an XCTestDevices directory at ~/Library/Developer/XCTestDevices . This is the set of Simulators that are used by xcodebuild , distinct from the user interface. This means that xcodebuild can manage and use it's own set of iOS Simulators, independent of the Xcode UI.
Xcode creates those files after each build. They are unused, so you can delete them. If it is a server, you can periodically delete them:
Create a file with the library path:
sudo vim /etc/periodic.conf.local
In it, write:
daily_clean_tmps_dirs="/tmp /Users/bamboo/Library/Developer/Xcode/UserData/"
Run to make sure files are deleted every 3 days:
du -sh /Users/bamboo/Library/Developer/Xcode/UserData/IB\ Support/
sudo periodic daily
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