Apple Cinema Display Not Working

  • Last Post 1 weeks ago
Kevin Hale posted this 4 weeks ago

I just upgraded from a Pegasus3 R4 to a Pagasus32 R4.

Under my old set up I had a Apple Cinema Display with Thunderbolt 2 cable connected to my Pegasus via a Mini Display to Thunderbolt 3 adapter.

Now with my Pgasus32 R4 unit, when I patch the cables the same way as before my Cinema Display will not turn on. 

If I daisy chain the Pegasus to another raid (a G Drive Raid) and then contect my monitor to the G Drive Raid, the monitor will work.  The G Drive Raid is 32TB and gets loud and hot, so I rather not have it running all the time.

Any ideas as to why I can't get my monitor working witht he new Pegasus32 R4?

Thanks for your help!

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Ranjith kumar posted this 3 weeks ago

Hi Kevin,

Pegasus32 have Display port 1.4 at backside of the unit, have you checked 

with monitor connecting to it.


Promise Team

Kevin Hale posted this 3 weeks ago


Yes, I've tried using the Thunderbolt ports (I've tried both of them) and using the DP 1.4.  The monitor wouldn't come on for either of them.  I again tried using the monitor with the G Raid Drive and it worked fine, so I don't think it's a monitor issue.

Ranjith kumar posted this 3 weeks ago

Hi Kevin,

Kindly reach us through to verify the issue and help you.


Promise Team

Hyde Bean posted this 2 weeks ago

same issue, does anyone have an idea about this, why does this happens FaceTime? Kindly give any relevant solution.

Kevin Hale posted this 1 weeks ago

I got it working, but via the DP 1.4 port (which by the way, the person I talked to on the phone from Promise support said there's a compatibility issue with the Cinema Display and Pegasus, and what I did wouldn't work... but it did).

I got a DP 1.4 to Mini Display Port adapter on Amazon for 9 bucks. (  At first when I did this, like the tech said, it wouldn't work.  So, I basically gave up and have been waiting for the tech team to get back to me.

Today, however, when I installed some RAM on my computer I got the message that some software was blocked and I needed to allow it.   I went to System Preferences ---> Security & Privacy ---> clicked on the "General Tab" and then clicked on "Allow" at the bottom of the tab.  After clicking on "allow" I was taken to a panel where I could check a box to allow the RAM to work, however there was also a box showing that some Promise software was also being blocked.  I checked it, then plugged in my monitor and it worked!  

It only seems to have worked with using the DP 1.4 port.  It still wouldn't work using the Thunderbolt 3 port.  Not ideal, but I'll take it.

Good luck!