tdm-via-ssh

Target Display Mode via SSH

Slightly modified from http://aaronrutley.com/target-display-mode-via-ssh/ (archived)

Installation

iMac:

1. Move all files to ~/tdm/

2. brew install blueutil

3. Set up permissions:

   • System Preferences > Sharing > Remote Login ☑
   • You will also need to give some apps accessibility access (Security & Privacy > Privacy > Accessibility). Can add it after you run the code.

MacBook:

• create alias (by pasting into ~/.bash_profile)

  • username: the user you're logging into iMac
  • hostname: the iMac's name (run hostname in iMac's terminal to get it)
  • after adding the below code, source ~/.bash_profile to take effect

  # imac target display mode function
  alias imac='function _imac(){
  	if [ $1 = "start" ]; then
  		echo "--- MacBook Bluetooth on...";
  	    blueutil -p 1;	
  		sleep 1;
  		echo "--- Connecting to iMac via ssh...";
  		ssh -2 -p 22 username@hostname.local sh ~/tdm/start.sh;
  	fi
  	if [ $1 = "end" ]; then
  		echo "--- MacBook Bluetooth off...";
  		blueutil -p 0;
  		sleep 1;
  		echo "--- Connecting to iMac via ssh...";
  		ssh -2 -p 22 username@hostname.local sh ~/tdm/end.sh;
  	fi
  	if [ $1 = "shutdown" ]; then
  		echo "--- MacBook Bluetooth off...";
  		blueutil -p 0;
  		echo "--- Shutting down remote imac.....";
  		ssh -2 -p 22 username@hostname.local sh ~/tdm/shutdown.sh;
  	fi
  	if [ $1 = "ssh" ]; then
  		echo "--- Connecting via ssh.....";
  		ssh username@hostname.local;
  	fi
  };_imac'

• SSH into iMac without password:

  • Snippet from: https://danielpataki.com/target-display-mode-remotely/ (archived)

  # when you issue the following command you'll be asked some questions, keep hitting enter until done.
  ssh-keygen
  scp ~/.ssh/id_rsa.pub username@hostname.local:~/
  ssh username@hostname.local
  mkdir .ssh # skip this if you already have the folder
  cat id_rsa.pub >> ~/.ssh/authorized_keys
  rm -f id_rsa.pub
  exit

Usage

imac start: start TDM

imac end: end TDM

imac shutdown

imac ssh: ssh into iMac