Mac Errors

Prerequisites

Please check whether you have completed all of the steps carefully for ROS setup and that you have setup X-forwarding with xQuartz

Unable to open display “host.docker.internal:0”

Solution 0: Did you install everything?

Did you install homebrew?

homebrew installation guide
Did you install docker?

Download with Homebrew
```
 brew install docker
```
It is also nice to install the Desktop app itself:

Docker download

You might want to make a docker account and select the free plan
Did you install xQuartz?

Download with Homebrew:
```
 brew install --cask xquartz
```
Download Online:

xquartz download
Did you install xeyes?

xeyes is command that can test whether you have configured your environment.

Note: You need to install macports to run it (see below).
```
 sudo port install xeyes
```
Run the following command to see a pair of eyes following your cursor!
```
 xeyes
```
If it does not work, it means that your setup is broken.
(Optional) Did you install macports?

Macport installation guide: Macport guide

Solution 1: Did you configure xQuartz, xhost and Docker?

Check if you installed xquartz in solution 0
open xquartz through terminal with
```
 open -a XQuartz
```
Go to x11 preferences and security, and make both checkmarks are selected:
Restart your Mac
```
 sudo shutdown -r now
```
After restarting, start up xQuartz with
```
 open -a XQuartz
```
Start xhost with
```
 xhost
```
Continue with the guide!

Solution 2: Did you set your Display IP address?

Attach your local ip address 127.0.0.1 to xhost:
```
 xhost + YOUR_IP_ADDRESS_FROM_ABOVE
```

If this doesnt work:

Get your local ip address with

 ifconfig en0 | grep inet | awk '$1=="inet" {print $2}

Attach the result to xhost:
```
 xhost + YOUR_IP_ADDRESS_FROM_ABOVE
```
Continue with the guide!

Solution 3: Manually set the display:

Set the display with
```
 DISPLAY=127.0.0.1:0
```
initialize xhost:
```
 xhost
```
open xhost ports:
```
 xhost +
```
try steps 1 to 3 with your ip address from Solution 2 Use the following command in step 1:
```
 DISPLAY=YOUR_IP_ADDRESS:0
```
Continue to follow the guide!

Solution 4: Try combination of Solution 2 and 3:

Use the commands in a different order, after starting xquartz and docker

Solution 5: add x11 server through Mac Ports:

If you don’t have macport installed:

Macport installation guide: Macport guide
Install x11 server through:
```
 sudo port install xorg-server
```
Continue to follow the guide or try Solutions 1-4!

Helpful Links:

Medium Article Guide

Oracle Archives Guide

Legendary Stack Overflow Answer #1

Legendary Stack Overflow Answer #2