Thanks Andrew…
I can’t get the ACD to work at all…
It shows up as loading when I boot up and then goes to black.
I did try swapping ports and even removing the other monitor from the other port…
I can’t get another Atlona DP400 as they are discontinued – I suspected it may have been the problem, but it is only a year old and was working fine until the adobe install.
I am trying to avoid having to spend any more on this Mac as I am hoping that at some point in the near future Apple will actually release a Mac Pro that is ready to deal with 4 and 8k material. (The current mac pro has seen little change since 2013 so I am waiting patiently to see what they do.
Just annoying that it just stopped working for no apparent reason. Working on a single 1080p monitor is a nightmare.
I don’t know of any replacements for the Atlona DVI convertor – I guess after a couple of years Macs become hopelessly redundant so support for peripherals fades along with them. 🙁