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After updating to Catalina, Mac Mini 2018 does not send any HDMI signal.
It was working fine today, until the Catalina update.
Can not enter safe mode nor recovery mode.
Tried resetting NVRAM, no change.
Just in case, I tried another cable and I also tried connecting it to AVR, but still no signal.
Mini is connected to 4K TV, I don’t have any other option (except USB-C to HDMI adapter which I don’t have).
Mac mini 2018 or later
I see. Well it appears not many got the memo to NOT upgrade to Catalina :)
Anyway, patience is in hand
Same problem here. The display goes to sleep, and then cannot wake up, no matter how I tried.
stupid Apple, get it together
The memo came out AFTER many many people upgraded and had problems.
Yeah it would appear that updating to Catalina resulted in some firmware change but rolling back the software does nothing for the firmware change.
Same problem here. MacBook Pro (Retina, 15-inch, Mid 2015) with Iiyama HDMI external screen, no Signal Detected after the OSX Catalina update. Please fix this bug...
Same problem here.
[Mac mini 2018 + HDMI + Samsung 4k display]
Use USB-C to HDMI as a workaround now.
Please please please fix this issue, thanks.
I have a MacBook Air (early 2015) and I hav the same issue. It's not just the minis
Already ahead of you and mostly back to Windows, kept the Mac Mini in case I needed it, but once this issue is resolved Ebay it goes.
That was a good idea. Just used that thinking with a usb-c adapter to hdmi which also worked. It seems bypassing hdmi is needed to get you back in to update. 2019 Mac mini.
I have this cable but no result!!!
https://www.amazon.com/gp/product/B07429CF97/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
Any updates from Apple Support?
It was a supplementary update, so no version change, 10.15.1 is at developer beta, still to be released.
I use a usb c to HDMI adapter , took a while to find one that would work at 4k @ 60 Hz.
That update was to address some other install issues.
Fixed my iMac but still have same problems with my Mac mini .
I know, the original Apple one does not work with 60Hz...
No HDMI signal after update
