Upgrade to 10.11.6 - now monitors do not work

We run El Capitan on a Mac Pro (not mobile office) with AMD over-pants D500 3072 MB graphics card.

He showed on a Dell monitor. It stopped working around when we have updated to 10.11.6.

We tried to connect to different monitors and the TV. We tried HDMI to HDMI on a Samsung, HDMI to HDMI to a Dell U2711, Thunderbolt Display port on a Dell U2715H and fell in love with Mini Display Port on a U2715H. In all of these combinations, no image appears on the monitors/TVs and they say that no signal is received.

We tried resetting the PRAM and the MSC on the Mac. (in that order)

The Mac Pro, remote desktop, we can, so we know that it still works fine. On the top menu, if you try to see what it displays is using, we see a greyed out "connected projector: unknown display. We don't have a projector.

He played in our Apple TV. But we would like it to appear on a normal screen.

Any suggestions?

I'm having a similar problem. OS X update 10.11.6 (1004 15) using a Mac Pro (early 2009). Immediately, I learned the web (346.03.15f02) nvidia driver was not compatible and graphics driver sound using the default OS X. I had no idea of this update was this new, otherwise I would not have done. This machine is already quite bland. Take a screenshot does not work properly, so I had to take a picture outside. Background images are the exact same as well.

The monitors are HP L1906 (left) and DELL P2212H (right). LED Cinema Display Monitor works fine. Now that I'm at work, TI guys have no idea. I think it's the nvidia driver which needs it, but I don't know how long it will be. Think to roll, return to 10.11.5 but not 100% sure if this would be the best option. I work as a video editor and the colors being off is a huge problem.

Any suggestions?

Tags: Mac OS & System Software

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