Here also on a D6000. After upgrading to Sequoia 15.2 only the 2 monitors on displayport are working. The 3rd monitor on HDMI does not give any signal anymore
Putting the HDMI cable directly in the Macbook gives me the 3rd monitor back, but thats not why I did buy a D6000 for.
D6000 currently on version 31.54
Hopefully a patch will be delivered soon?????