CAC-1504 doesn’t provide 4k60hz on 2018 MacBook Pro 13″ TB

Updated 6 days ago in Adapters and Cables
2 on 25-10-2018

Hi there,

I just picked up the CAC-1504 USB-C to HDMI 2.0 Active adaptor for my MacBook Pro, 2018 generation, 13″ with TouchBar, and cannot get any screen I’ve tried (a Dell 4K UHD and Sony 4K UHD TV) to connect @ 4k60hz; all I can get is 4k30hz. I know both screens have HDMI 2.0 ports, and can get 4k60hz with other devices just fine.

I’ve made certain the cable I’m using is an HDMI 2.0 Certified cable, but cannot get it to work, even after resetting my SMC.

My Mac is running Mojave 10.14.0, and the adaptor is revision A3-00, FW: C002 0009 / V7.55 1821.

Is there a firmware update for this dongle, or should I go with the newer CAC-2504 I see listed?

Any advice would be appreciated!

Cheers

 
  • Liked by
Reply
1 on 29-10-2018

Hello MagMan1979,

The CAC-2504 does have a different chipset than CAC-1504, however, the cAC-1504 should work on a MAC Pro.

You already have the latest firmware on the CAC-1504, os that is ok.

 

In general

  • Setup

Setups with TV’s normally work best by making a custom resolution, 3840*2160 at 60 Hz with Timing Standard set to CVT-RB (Reduced Blanking).

(For setups with Monitors Timing Standard can remain on “auto”.)

On most TV’s you will need to do some settings like “Enhanced Mode”/ “PC-Mode” and/or “UHD Color” for the HDMI 2.0 port in use. 

Please make sure the HDMI port of the Screen/TV supports 4K 60 Hz, often not all HDMI inputs support that.

 

  • Custom Resolution

To be able to generate such a Custom Resolution you will need an app like SwitchResX since MAC OS does not provide such settings.

Should be something like this, please do make sure to have it set to “CVT-RB”

 

 

The CAC-2504 does have a different chipset than CAC-1504, however, the cAC-1504 should work on a MAC Pro

 

6 days ago

Did you mange to get it working ?

Show more replies
  • Liked by
Reply
Cancel