![Troubleshooting tips for using an old iMac as an external display for a Thunderbolt 3 Mac | Macworld Troubleshooting tips for using an old iMac as an external display for a Thunderbolt 3 Mac | Macworld](https://www.macworld.com/wp-content/uploads/2023/01/new_2017_imac_two_side-100724913-orig.jpg?quality=50&strip=all)
Troubleshooting tips for using an old iMac as an external display for a Thunderbolt 3 Mac | Macworld
![Using iMac 21.5 mid 2010 as an external monitor of Macbook Pro Retina late 2013 15"? - Ask Different Using iMac 21.5 mid 2010 as an external monitor of Macbook Pro Retina late 2013 15"? - Ask Different](https://i.stack.imgur.com/JEU3z.png)
Using iMac 21.5 mid 2010 as an external monitor of Macbook Pro Retina late 2013 15"? - Ask Different
Using 2010 iMac or LED Cinema Display as a Display for Power Mac G5 or 2006-08 Intel Mac | MacRumors Forums
![Incase anyone ever needs the answer…I have a 27” 2010 iMac working in Target Display Mode with a M1 MacBook Pro using a miniDP to USB C adaptor that's capable of 4k60Hz. Incase anyone ever needs the answer…I have a 27” 2010 iMac working in Target Display Mode with a M1 MacBook Pro using a miniDP to USB C adaptor that's capable of 4k60Hz.](https://i.imgur.com/jzZkj8b.jpg)