Trying to connect 2017 Macbook Pro to The Apple Cinema HD 30-inch display not working

4 replies

Hello - I bought the CAC1510-a-HDCP Off  in the hopes that I could connect my 2017 Macbook Pro to my old Apple Cinema HD 30 inch display.  However when I connect everything and go to my display settings, hold down the control key and click on the Scaled radio button - I only have two options - 1280x800 and 1024x640.  I'm including all of the pics of my product and what I'm seeing on my screen - I'm really hoping someone can assist with this as everything on your website said this would work.  Is there some other settings I should be changing that I'm missing?

Thanks,

Sherry Ott - [email protected]

Is the CAC-1510-A connected directly to the MacBook Pro? Holding the Option key and clicking "Scaled" should show all the modes including 2560x1600.

The CAC-1510-A cannot do 2560x1600 if it's connected to a USB-C dock that supports USB 3.x but it should be fine when connected to a Thunderbolt dock. The reason is that it is limited to HBR link rate which requires 4 lanes to do 2560x1600 and USB-C docks that support USB 3.x only support two lanes.

The AGDCDiagnose command in macOS tells you the DisplayPort connection type (link rate and link width). The CAC-1510 should be [DP 1.2 4 x HBR ]

I am connecting this directly to my MacBook, not through a  USBc dock.

When using the option key, I see the following:

What version of macOS?

Does SwitchResX show the 2560x1600 timing?

Post the result of the AGDCDiagnose command to pastebin.com or something. 

/System/Library/Extensions/AppleGraphicsControl.kext/Contents/MacOS/AGDCDiagnose -a > AGDCDiagnose_a.txt 2>&1

Log in to reply or create an account