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Hi all,
My HDMI 14 inch 2021 Macbook is not working correctly after updating to Monterey 12.6. I tried multiple screens and different HDMI cables. The screen says that there is no video output but is reacting when I put the cable in and out. Anyone has an idea what to do?
Thanks!
MacBook Pro 14″, macOS 12.6
That's an ordinary 1920 by 1080p display. it should not be a challenge, unless...
HDMI cables you want for HDMI-only Displays (higher resolutions than 720p TV sets) are marked as Certified with an anti-counterfeiting tag and are labeled:
"Premium High Speed HDMI cable" or that + "with Ethernet" --OR--
"Ultra High Speed HDMI cable" or that + "48G"
Cables with No Certification tags are good for your standard 720p TV set, and not much more.
I worked on different locations for almost one year. All the different screens were connected via the HDMI port and were always working. Since the latest update none of them are working. Very weird. I contacted Apple support but they couldn't help me.
The Apple standard for its built-in hardware-accelerated displays, makes them suitable for full-motion video for production/display of cinema-quality video with NO dropped frames, and NO dropouts or partial-blank scan lines due to memory under-runs or other issues.
One thing that has changed with later version of MacOS software is the software's ability to read and respond to messages sent back from the display indicating that data arrived at the display with errors. Perhaps that change is what has caused the change for you.
HDMI cables can be a serious problem area. I have been forced to upgrade HDMI cables to the ones I mentioned for MY high-end TV set. Which cables can really make a difference.
you have not directly responded to my suggestions about cables.
¿Have you tired using cables marked Certified Premium cables?
what make&model display, or a link to its specs?
Thanks for helping.
I tried many different displays and they all worked before. The one I'm currently using is a Philips (PHL 273V7). I am using an USB-C to HDMI adapter now and that works.
I tried different monitors, HDMI is not working. I think I need to bring my Macbook in for repair. Thank you for helping.
HDMI port not working after update 12.6
