As an owner of a 2010 27" iMac I often wondered if I could use it as an external display. Well luckily for me I could, here is how.
What cables do you need?
It wasn't clear what I needed to begin with but after testing several cables I landed on this one from Amazon. It's a Mini DisplayPort cable and although I have linked to Amazon here you can pick them up from loads of other places online.
What am I connecting it to?
So now I have my output I.e. the iMac I need to know what I want to connect to it, in my case
- 2014 13" MacBook Pro
- 2015 Dell Latitude E7450
Ok, so how do I do it?
You first need to make sure that your iMac still has the keyboard attached (to control the brightness and volume of any audio output). Start up the iMac as normal then plug the Mini DisplayPort cable into the Mini DisplayPort on the back of the iMac.
Take the other end and plug this into one of the Thunderbolt 2 ports on the left hand side of the MacBook Pro. For the Dell I plugged this into the Mini DisplayPort.
When you connect the iMac it will lose it's focus and the connected device will take over.
Let me know if you have any issues or need support.