I'm finding that watchman is hanging in the background (called by react-native), or when run directly in the console.
watchman version and watchman shutdown-server just hang in the terminal, indefinitely. There is no response. The CPU is not spinning.

watchman version:

OS: Sierra 10.12.1
Xcode: 8.1
node: v7.0.0
I've tried uninstalling and reinstalling watchman to no avail.
brew upgrade has no effect, nor does brew doctor
Probably a duplicate of https://github.com/facebook/watchman/issues/358
Thanks for that @wez. The following cleared up the issue for now
launchctl unload ~/Library/LaunchAgents/com.github.facebook.watchman.plist
watchman version
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Thanks for that @wez. The following cleared up the issue for now