How do I erase an Xcode 10 simulator clone through CLI?

Question

Do they share the same UDID? How are they implemented under the hood?

The scenario is I have 4 clones running UI tests in parallel. I need a clean simulator for some tests (but want to keep random test order)

Anton Plebanovich · Accepted Answer · 2020-01-06T07:10:34.903

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Command to erase all testing simulators (you'll need to restart Xcode after that):

xcrun simctl --set testing delete all

Overall, it should be better to just reset those sims (you won't need to restart after that):

xcrun simctl --set testing shutdown all
xcrun simctl --set testing erase all

To erase specific one you first need to get his ID with list devices and then shutdown and erase:

xcrun simctl --set testing list devices
xcrun simctl --set testing shutdown 2BC2B50E-C4BA-45B9-9C73-AF5097BA1F0B
xcrun simctl --set testing erase 2BC2B50E-C4BA-45B9-9C73-AF5097BA1F0B

Thanks Scott McCoy for his answer.

edited Jan 06 '20 at 07:10

answered Jan 04 '20 at 03:00

Anton Plebanovich

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But how do I reset a specific one? Tests are still running on others, and I need to reset one to prepare it for the "clean slate" test – Alexandre G Jan 06 '20 at 01:32

score 2 · Answer 2 · answered Jul 11 '19 at 17:00

I have not been able to find any interface with cloned simulators via simctl. You can completely remove them by deleting their folder under ~/Library/Developer/XCTestDevices. They each get their own UUID, but again, they don't get listed in simctl as far as I can tell.

score 2 · Answer 3 · answered Dec 12 '19 at 20:45

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You can list clones like this: xcrun simctl --set testing list

But any time I try to use device IDs with xcrun commands they fail with Invalid device: <device id>

answered Dec 12 '19 at 20:45

Scott McCoy

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score 0 · Answer 4 · answered Oct 05 '18 at 07:32

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On your status bar with Xcode open on your mac go to Windows->Devices and Simulators. There you will see a list of all the available simulators and you can add new or delete existing from there.

answered Oct 05 '18 at 07:32

nishith Singh

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Hi, thanks for your answer. I am not seeking to remove a simulator but to erase its data - similar to what `Erase all content and settings does` but through terminal – Alexandre G Oct 06 '18 at 07:10

score 0 · Answer 5 · answered Oct 15 '18 at 18:44

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you can reset all the simulators by: xcrun simctl erase all

to reset a particular simulator use: xcrun simctl erase your_simulator_id

answered Oct 15 '18 at 18:44

mark w.

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So as per question, I'm looking to erase a particular clone. How do I find the *clones* simulator id? – Alexandre G Oct 16 '18 at 04:29
_xcrun instruments -s_ will give you the ids of all simulators – mark w. Oct 18 '18 at 02:46

How do I erase an Xcode 10 simulator clone through CLI?

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