CoreData: annotation: Failed to load optimized model (React Native)

user_3129306 0
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I can not start my react native application anymore. I updated XCode yesterday, maybe it has to do with it?

$ react-native run-ios

Found Xcode workspace xyz.xcworkspace
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'
dyld: Symbol not found: _SimAudioHostUseSystemDefaultDeviceUID
Referenced from: /Applications/Xcode.app/Contents/Developer/usr/bin/../../Library/PrivateFrameworks/SimulatorKit.framework/Versions/A/SimulatorKit (which was built for Mac OS X 10.12)
Expected in: /Library/Developer/PrivateFrameworks/CoreSimulator.framework/Versions/A/CoreSimulator
in /Applications/Xcode.app/Contents/Developer/usr/bin/../../Library/PrivateFrameworks/SimulatorKit.framework/Versions/A/SimulatorKit
react-native xcode
6 Answers

I simply had to start XCode one time after the update and then I was asked if I want to install additional components. That's all.

user_31293060

+1 on what @Jan mentioned. This happened to me after upgrading XCode to latest, and then running react-native run-ios threw the same error. Booting up XCode prompted me to install additional components, and that resolved the issue.

user_12484270

If you just updated your Xcode to Xcode 11.1 simply go to Xcode->preferences->Locations and change the command line tool to 11.0, this worked for me!

user_32141250

I was running XCode v9.2 and I was getting this error. Basically Then I had to Upgrade to Mac 10.13.2 (Sierra to High Sierra) and then download XCode v9.4. When I opened XCode 9.4 for the first time I was asked to download the components that everyone is talking about. I no longer had the error.

user_3734660

Couldn't figure it out, but I realized that running from Xcode directly works.

user_7678650
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