I have a new macbook pro (2018) and want to connect it to my old iMac 2011 using target display mode. I used to be able to do this just fine with my old MacBook pro (mid 2012) that had a thunderbolt 2 port.
In the new set up, I have a thunderbolt 2 cable and an adapter to connect to the new MacBook pro that converts thunderbolt 2 to thunderbolt 3 (USB-C). When i press command + f2 on the iMac, the screen flickers and then just stays black. My MacBook pro recognizes another monitor...so not sure whats happening.
Both systems are running the same OS, High Siera, and I have tried changing the adapter to make sure that was not the problem. Any help would be appreciated because I see that some people have managed to get this to work! Are 3rd-party adapters better at getting the job done?