diff --git a/appimage/10/README.md b/appimage/10/README.md
index 26b35a29..ad4bc7ce 100644
--- a/appimage/10/README.md
+++ b/appimage/10/README.md
@@ -42,20 +42,28 @@ Example startup with command line options:
 # FAQ: How to use (inside docker / podman)
 
 ```
+echo DISPLAY=$DISPLAY # should look like :0
+xauth list # find the correct cookie for display :0 ; dnf install xauth
+export X11_AUTHORITY_COOKIE="00112233445566778899aabbccddeeff" # fixup with your exact cookie
+
 chmod +x Magic-x86_64.AppImage
 
 ### Podman or Docker, use :Z when rootless with selinux enabled
 podman run --rm --device /dev/fuse --privileged \
   -v "$(pwd):/tmp/work:Z" -v "/tmp/.X11-unix/X0:/tmp/.X11-unix/X0:Z" \
-  -e DISPLAY -ti almalinux:10
+  -e DISPLAY -e X11_AUTHORITY_COOKIE -ti almalinux:10
 
 ### Inside Docker:
 dnf update -y
 
-dnf install -y fuse libX11 cairo libGL libGLU
+dnf install -y fuse libX11 cairo libGL libGLU xauth
 
 cd /tmp/work
 
+echo DISPLAY=$DISPLAY # should look like :0
+echo X11_AUTHORITY_COOKIE=$X11_AUTHORITY_COOKIE # should look like hex-string
+xauth -q add "$DISPLAY" "MIT-MAGIC-COOKIE-1" "$X11_AUTHORITY_COOKIE"
+
 ./Magic-x86_64.AppImage -d XR -T scmos
 ```
 
diff --git a/appimage/7/README.md b/appimage/7/README.md
index 1bc05729..b3fa62e9 100644
--- a/appimage/7/README.md
+++ b/appimage/7/README.md
@@ -42,12 +42,16 @@ Example startup with command line options:
 # FAQ: How to use (inside docker / podman)
 
 ```
+echo DISPLAY=$DISPLAY # should look like :0
+xauth list # find the correct cookie for display :0 ; dnf install xauth
+export X11_AUTHORITY_COOKIE="00112233445566778899aabbccddeeff" # fixup with your exact cookie
+
 chmod +x Magic-x86_64.AppImage
 
 ### Podman or Docker, use :Z when rootless with selinux enabled
 podman run --rm --device /dev/fuse --privileged \
   -v "$(pwd):/tmp/work:Z" -v "/tmp/.X11-unix/X0:/tmp/.X11-unix/X0:Z" \
-  -e DISPLAY -ti centos:7
+  -e DISPLAY -e X11_AUTHORITY_COOKIE -ti centos:7
 
 ### Inside Docker:
 echo "FIXUP yum from vault and update" \
@@ -61,10 +65,14 @@ echo "FIXUP yum from vault and update" \
   && yum -y update \
   && rm -f /tmp/CentOS-Base.repo.old
 
-yum install -y fuse libX11 cairo
+yum install -y fuse libX11 cairo xauth
 
 cd /tmp/work
 
+echo DISPLAY=$DISPLAY # should look like :0
+echo X11_AUTHORITY_COOKIE=$X11_AUTHORITY_COOKIE # should look like hex-string
+xauth -q add "$DISPLAY" "MIT-MAGIC-COOKIE-1" "$X11_AUTHORITY_COOKIE"
+
 ./Magic-x86_64.AppImage -d XR -T scmos
 ```
 
diff --git a/appimage/8/README.md b/appimage/8/README.md
index 97dad988..892cb582 100644
--- a/appimage/8/README.md
+++ b/appimage/8/README.md
@@ -42,20 +42,28 @@ Example startup with command line options:
 # FAQ: How to use (inside docker / podman)
 
 ```
+echo DISPLAY=$DISPLAY # should look like :0
+xauth list # find the correct cookie for display :0 ; dnf install xauth
+export X11_AUTHORITY_COOKIE="00112233445566778899aabbccddeeff" # fixup with your exact cookie
+
 chmod +x Magic-x86_64.AppImage
 
 ### Podman or Docker, use :Z when rootless with selinux enabled
 podman run --rm --device /dev/fuse --privileged \
   -v "$(pwd):/tmp/work:Z" -v "/tmp/.X11-unix/X0:/tmp/.X11-unix/X0:Z" \
-  -e DISPLAY -ti almalinux:8
+  -e DISPLAY -e X11_AUTHORITY_COOKIE -ti almalinux:8
 
 ### Inside Docker:
 dnf update -y
 
-dnf install -y fuse libX11 cairo libGL libGLU
+dnf install -y fuse libX11 cairo libGL libGLU xauth
 
 cd /tmp/work
 
+echo DISPLAY=$DISPLAY # should look like :0
+echo X11_AUTHORITY_COOKIE=$X11_AUTHORITY_COOKIE # should look like hex-string
+xauth -q add "$DISPLAY" "MIT-MAGIC-COOKIE-1" "$X11_AUTHORITY_COOKIE"
+
 ./Magic-x86_64.AppImage -d XR -T scmos
 ```
 
diff --git a/appimage/9/README.md b/appimage/9/README.md
index 30acbe46..459dda11 100644
--- a/appimage/9/README.md
+++ b/appimage/9/README.md
@@ -44,20 +44,28 @@ Example startup with command line options:
 # FAQ: How to use (inside docker / podman)
 
 ```
+echo DISPLAY=$DISPLAY # should look like :0
+xauth list # find the correct cookie for display :0 ; dnf install xauth
+export X11_AUTHORITY_COOKIE="00112233445566778899aabbccddeeff" # fixup with your exact cookie
+
 chmod +x Magic-x86_64.AppImage
 
 ### Podman or Docker, use :Z when rootless with selinux enabled
 podman run --rm --device /dev/fuse --privileged \
   -v "$(pwd):/tmp/work:Z" -v "/tmp/.X11-unix/X0:/tmp/.X11-unix/X0:Z" \
-  -e DISPLAY -ti almalinux:9
+  -e DISPLAY -e X11_AUTHORITY_COOKIE -ti almalinux:9
 
 ### Inside Docker:
 dnf update -y
 
-dnf install -y fuse libX11 cairo libGL libGLU
+dnf install -y fuse libX11 cairo libGL libGLU xauth
 
 cd /tmp/work
 
+echo DISPLAY=$DISPLAY # should look like :0
+echo X11_AUTHORITY_COOKIE=$X11_AUTHORITY_COOKIE # should look like hex-string
+xauth -q add "$DISPLAY" "MIT-MAGIC-COOKIE-1" "$X11_AUTHORITY_COOKIE"
+
 ./Magic-x86_64.AppImage -d XR -T scmos
 ```