Question: Syncing issue between MacBook Pro (2018) and using iMac (2011) as an external display
I have just replaced my MacBook Pro (2014) with the latest MacBook Pro (2018).
I have an iMac (2011) that I have been using successfully as an external display to the 2014 MacBook Pro. The cable connecting the devices was Thunderbolt to Thunderbolt.
For my new MacBook Pro (2018) I have bought the Thunderbolt 3 to Thunderbolt 2 connector and connected this to the cable to my iMac.
When I press CMD F2 on my iMac the display attempts to sync with the MacBook Pro (lots of flashing screens) but eventually fails to sync.
MacBook Pro TouchBar and Touch ID, macOS High Sierra (10.13.6), iMac is also 10.13.6