"yarn start" for React Native app fails with "Unable to start server"

Question

When I execute yarn start within my React Native app project folder I get this error:

yarn run v1.3.2
$ react-native-scripts start
21:58:08: Unable to start server
See https://git.io/v5vcn for more information, either install watchman or run the following snippet:
sudo sysctl -w kern.maxfiles=5242880
sudo sysctl -w kern.maxfilesperproc=524288

error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

Answer 1

After I executed the two commands - sudo sysctl -w kern.maxfiles=5242880 and sudo sysctl -w kern.maxfilesperproc=524288 - from the error message yarn start worked liked expected.