[Testing] Fix iOS UITest failure when unusable simulator runtimes are present #32736
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When XHarness tries to check if a simulator runtime is installed, it can encounter unusable runtime disk images (e.g., with invalid signatures). This causes XHarness to fail during the connectToDevice phase. This fix adds a CleanupUnusableRuntimes() function that: 1. Queries all simulator runtimes using 'xcrun simctl runtime list -j' 2. Parses the output to find runtimes with state "Unusable" 3. Deletes those unusable runtimes before calling XHarness This prevents XHarness from encountering and failing on unusable runtimes. Fixes issue where iOS UITests fail with "(-67061 invalid signature)" errors. Co-authored-by: simonrozsival <[email protected]>
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[WIP] Fix connectToDevice failure in iOS UITests
Fix iOS UITest failure when unusable simulator runtimes are present
Nov 19, 2025
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simonrozsival
November 19, 2025 12:43
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It would be very helpful if you could test the resulting artifacts from this PR and let us know in a comment if this change resolves your issue. Thank you!
Description of Change
XHarness crashes during
connectToDevicewhen encountering simulator runtimes with state "Unusable" (e.g., invalid signature errors). This prevents iOS UITests from running.Added
CleanupUnusableRuntimes()ineng/devices/ios.cakethat:xcrun simctl runtime list -jto enumerate all simulator runtimes"state" : "Unusable"xcrun simctl runtime deletebefore XHarness invocationThe cleanup runs automatically in
GetSimulators()before callingxharness apple simulators install.Issues Fixed
Fixes https://dev.azure.com/xamarin/public/_build/results?buildId=154089 (issue reported via build logs showing XHarness encountering unusable runtime
8728D520-0F86-4227-AE03-716249BBB18Cwith error "(-67061 invalid signature)")Workaround for Xharness issue: dotnet/xharness#1500 -- once this issue is fixed, this change can be reverted.
Original prompt
This section details on the original issue you should resolve
<issue_title>[UITests][iOS] connectToDevice fails when checking if simulator is installed</issue_title>
<issue_description>Build logs: https://dev.azure.com/xamarin/public/_build/results?buildId=154089&view=logs&j=72a1bc6b-6e49-539f-11ef-42d638c466c3&t=af93ca54-ac95-5c13-8456-9efd54a38da7
Relevant part of the logs: