How do I dual monitor my 2020 iMac (Big Sur 11.3.1), with either my iMac Mid 2011 (High Sierra 10.13.6) Or my MacBook Pro Mid 2014 (Big Sur 11.3) - I have a Thunderbolt 3 (USB-C) to Thunderbolt 2 adapter and a Thunderbolt 2 to Thunderbolt 2 connector?
2020 Mac’s do not support using an iMac in Target Display Mode.
carefully study > https://support.apple.com/en-us/HT204592
You can connect any of these older iMac models to another Mac from 2019 or earlier for use as an external display.
Hi roseynick93,
Sorry, nothing you do will make it work. 2020 and new Macs are not compatible with Target Display Mode. Also, MacBooks are not supported as the Target Mac.
Cheers,
Jack
iMac Dual Monitor issues
