This message may appear when trying to build an iOS app. Sometimes the simulators are not ready before the build step. In this case, you can pre-start the simulators:
# ... steps: - run: name: pre-start simulator command: xcrun instruments -w "iPhone 11 Pro (13.3) [" || true
[ character is necessary to uniquely identify the iPhone 7 simulator, as the phone + watch simulator is also present in the build image:
iPhone 11 Pro (13.3) [<uuid>]for the iPhone simulator.
iPhone 11 Pro (13.3) + Apple Watch Series 5 - 40mm (6.1.1) [<uuid>]for the phone + watch pair.
You can also add the following run step to check for available simulators:
- run: xcrun simctl list &>/dev/null
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