iOS CLI hangs on "Starting simulator..."

Description

Installed create-react-native-app cli on a new OSX machine that has never ran Xcode or react-native projects before.

Creating a new project with create-react-native-app myProjectName then attempting to start it on iOS simulator via yarn ios hangs at “Starting simulator…” indefinitely with no errors or descriptions.

Expected Behavior

When attempting to run the project on iOS simulator on OSX the command line script yarn ios should not hang without some descriptive information.

Observed Behavior

I managed to resolve the issue with these steps:

1. run yarn eject and chose react-native project structure
2. run yarn ios
3. iOS simulator runs as expected

After running an ejected project, I created another demo project using the CRNA cli and then it successfully ran on the simulator.

Environment

Please run these commands in the project folder and fill in their results:

• npm ls react-native-scripts: 1.14
• npm ls react-native: 0.55.4
• npm ls expo: 27.0.2
• node -v: 8.11.2
• npm -v: 6.1
• yarn --version: 1.6
• watchman version: 4.9

Also specify:

1. Operating system: OSX 10.13
2. Phone/emulator/simulator & version: iPhone 8 & iOS 11.3

[jeloagnasin]

I don’t know if this will help anyone. But it seems like I was just having trouble with my internet connection that’s why the Expo Client on my iOS simulator won’t launch.

So basically, I deleted the Expo Client on the simulator to reset the data. And when I tried to relaunch it with yarn run ios, it won’t open because I have a faulty internet connection. The next day, I tried it again without changing anything. It worked!

[dillon]

Same here. Any other fixes?