MacBook Air M1 with iMac 27" 2010 as secondary/external display works!

Описание: Excuse my bumpy English, I had no script and just winged it.

M1 & Target Display Mode works: This is a quick and dirty video showing you that Apple’s article (https://support.apple.com/en-us/HT204592) about Target Display Mode is incorrect.

Target Display Mode is not a proprietary protocol where one Mac talks to another Mac and negotiates if displaying content is allowed. Target Display Mode is just a "software switch" inside of (in this case) the iMac. It can toggle between the input from the OS and the input from the Mini DisplayPort on its back. The kb article states that the host computer must have been introduced in 2019 or earlier and have macOS Catalina or earlier installed. That’s nonsense. If a potato can output a proper DisplayPort signal then an iMac with Target Display Mode and a Mini DiplayPort will most likely show it.

In this video I use a MacBook Air M1 from 2020 (running Big Sur 11.4) and an iMac 27" from 2010 (running High Sierra 10.13.6) and a cheap USB-C to Mini DisplayPort adapter and a Mini DisplayPort to Mini DisplayPort cable. Sometimes you have to press ⌘ + f2 to activate/toggle Target Display Mode, in my case it switched automatically without a needed input from me. If you have a question, drop it in the comment section below and I’ll try to answer it.

Btw. the expensive USB-C to Mini DisplayPort cable by "Mophie" purchased at Apple did not work. Could have been a faulty cable, could be because the cable is different from my current setup (note that I now use that cheap adapter and cable combo).

Affiliate links to the adapter/cable:

https://www.amazon.de/gp/product/B08P...

https://choetech.com/products/usb-c-t...

https://www.amazon.de/gp/product/B076...