Does Catalina fix HDMI port issue?

steve333

macrumors 6502a
Original poster
Dec 12, 2008
879
503
I've read from 2 beta testers that Catalina fixes the issue with the HDMI port not recognizing monitors.
Brand new Mini connected with a DVI to HDMI cable and the Mini didn't recognize it. It only worked if I unplugged and plugged back in the cable from the HDMI port.
Apple knows about it, why haven't they released a fix on Mojave for it?
 

tnkrmdc

macrumors newbie
Sep 1, 2009
25
2
It is the same for my mac mini. It gets really annoying. My boot camp Windows 10 partition doesn't have the same issue.
 

twosix98

macrumors newbie
Sep 29, 2019
1
0
The last 2 Catalina beta have been giving me hdmi output problem on the mac mini 2018. i have a LG 4K monitor connected via hdmi but whenever the mac mini is powered on, it will not detect the monitor and the monitor will go into sleep mode. i have to use an egpu connected via one of the thunderbolt ports to be able to use the mac mini.
 

steve333

macrumors 6502a
Original poster
Dec 12, 2008
879
503
I gave up and went with a DVI to USB-C cable and it works so I've given up on using the HDMI port
 

CRMFYI

macrumors newbie
Oct 10, 2019
1
0
Has anyone found a fix for this? I'm now on Catalina official release and I can't get any HDMI cable to work to my second monitor through HDMI to HDMI. I'm using 2 LG 4k monitors that worked great with the same cabling on Mojave, but only my USB-C to HDMI cable is working.
 

Dave_O

macrumors member
Nov 16, 2018
63
20
My 2018 Mac Mini started not sending an HDMI signal to my Samsung TV monitor after I upgraded to Catalina. I have a USB-C to HDMI cable on order. Here's my current workaround:

if the Mac is booted and not sending a signal to the TV, I use Jump desktop to remotely log in and shut the Mac down from thaty desktop session. Starting the mac again activates the HDMI link and all is well.

I downgraded back to Mojave with a CCC clone, but the issue persisted. My current guess is that Catalina updated some Firmware on the Mac along with the OS, but that is just a guess.
 

steve333

macrumors 6502a
Original poster
Dec 12, 2008
879
503
Having issues with my new Cable box connected by HDMI to the TV.
I'm beginning to really dislike HDMI. Buggy as heck