Sometimes System Preferences gets stuck with a orange dot when you enable remote login:

![macos sshd not starting from System Prefs](macos_enable_sshd_hang.png)

See [this superuser.com](https://superuser.com/questions/1255853/unable-to-restart-ssh-on-mac-os-sierra-launchctl-unload-could-not-find-specifi)

These may work
```
sudo launchctl stop com.openssh.sshd
sudo launchctl start com.openssh.sshd
```

```
sudo launchctl unload /System/Library/LaunchDaemons/ssh.plist
sudo launchctl load /System/Library/LaunchDaemons/ssh.plist
```