Running react native project on Sierra using xCode v9.1.
Full error:CoreData: annotation: Failed to load optimized model at path '/Applications/Xcode.app/Contents/Applications/Instruments.app/Contents/Frameworks/InstrumentsPackaging.framework/Versions/A/Resources/XRPackageModel.momd/XRPackageModel 9.0.omo'
We couldn't boot your defined simulator due to an already booted simulator. We are limited to one simulator launched at a time.
Launching iPad Air (iOS 11.1)...
I have tried:
watchman watch-del-all,rm -rf node_modules && npm install,npm start -- --reset-cache- cleaning the project
- restarting my computer
Some success was had with: xcrun simctl list and xcrun simctl shutdown <booted simulator id> in that the "simulator is already booted error disappeared" but the simulator still did not display.
This happens intermittently and sometimes resolves itself with (seemingly) no action on my end. This makes me think it may be a bug in xCode or react-native? I'm at a loss at this point as to what to do to solve this issue.