Just updated to 12.4 and my second monitor, an ASUS HDMI is no longer recognized by my iMac 2017. The display dialog box in System Prefs now only shows the iMac display. Suggestions?
iMac 27″ 5K, macOS 12.3
I had been using an HDMI cable with a Thunderbolt adapter. Apparently the HDMI cable went bad. I switched it out for another HDMI cable (same adapter) and now all is well. Thank you, chuckbl.
I had been using an HDMI cable with a Thunderbolt adapter. Apparently the HDMI cable went bad. I switched it out for another HDMI cable (same adapter) and now all is well. Thank you, chuckbl.
Hello memecrafter2,
Does that still persist after following the steps below?
Check your cable or adapter
Disconnect the cable from your external display from your Mac, then reconnect it. If the cable from your external display doesn't connect to the ports on your Mac, you can use a USB-C or Thunderbolt adapter. If you're using a USB-C or Thunderbolt adapter to connect a display, the adapter must be compliant with DisplayPort Alt Mode or Thunderbolt / USB 4.
You can also find those steps in this resource: If your external display isn't detected or appears blurry when connected to your Mac - Apple Support
Should that behavior still persist, you'll want to reach out to Apple Support so they can look into this further: Contact - Official Apple Support
Take care.
Hi memecrafter2.
Glad to see that you are all set.
Cheers.
ASUS not starting up after upgrade to Monterey 12.4
