Create-react-native-app: ios: Unable to verify Xcode and Simulator installation.

[schickling]

I'm getting the following error when running npm run ios:

yarn run v0.20.3
$ react-native-scripts ios
Starting packager...
Starting simulator...
Unable to check Xcode version: Error: Process exited with non-zero code: 1
Failed to start simulator:

Unable to verify Xcode and Simulator installation.

Exiting...

[schickling]

Turned out there weren't any "Command Line Tools" selected in the Xcode settings. After selecting some it worked for me. Here is how it should look like:

Hope this helps others running into the same problem 🙂

[brentvatne]

@fson - just ran into this setting up a new machine, can we provide a better error message here?

[fson]

@brentvatne We certainly can. Perhaps when we detect that Xcode is installed but command line tools are not, we could display a message like:

Xcode command line tools not found. Run the command xcode-select --install to install them.

[brentvatne]

@fson - i think latest xcode installs command line tools by default (source: I set up a new machine yesterday, seemed to happen by default? or perhaps homebrew did it? :O) -- in this case all that's needed is what @schickling mentioned above. not sure what the command would be to run to do that without involving a GUI, we may need to make a quick docs page on the repo that shows the two situations and then link to that

[fson]

I think the CLI equivalent of selecting the path from the dropdown is xcode-select -s /Applications/Xcode-beta.app/Contents/Developer (-s is a shorthand for --switch). It would be cool if we could do this automatically somehow, but I think it might require sudo, so maybe not.

In any case, once this is implemented, we should test the full flow (no Xcode – Xcode installed – command line tools installed/selected) and verify that the error message makes sense after each intermediate step.

[jackkinsella]

I ran into this problem after Apple auto-updated my system. Even though I had xCode etc. working previously, the simulator stopped working with React Native because I had not agreed to Apple's latest terms and conditions. The fix in my case was simply to open xCode and hit "agree".

[ivivanov18]

Same solution as for jackkinsella worked in my case.

[pndirpaya]

@schickling Thanks for the fix! 🙌🏾👍🏾

[AbrantesMar]

I solved the problem Locations->Command Line Tools for version the xCode line

[rdewolff]

Thanks for sharing, that did the trick!

[coocon]

Thanks for sharing！

[cseparveen]

It is working for me..Thanks

[athulmurali]

Thanks @schickling
Your solution worked!

[yahor]

Thank you!

[tpmccallum]

Thank you, this worked for me.