How to: LibGTK errors "connection refused"
You may see one or more libgtk-related errors if you do not have everything set up for hardware virtualisation yet. If you have not yet done so, check out the [initial setup](#initial-setup) section and the [routine checks](#routine-checks) section as you may have missed a setup step or may not have all the needed Docker dependencies ready to go.

See also: [here](https://github.com/sickcodes/Docker-OSX/issues/174).

#### Permissions denied error

If you have not yet set up xhost, try the following:

```bash
echo $DISPLAY