D

DigDeal

Donux yeah well this plan backfired lol. I'm not buying another Mac, thank you. At least on Windows I could make a backup and roll back drivers and software on my own if needed.

macsforme yeah, pretty sure at that stage it's at least partially psychological. I'm literally scared to update any usable device at this point.

Interesting note, again proving my point that it's 100% software related, is that using "safe mode" makes it tolerable. Not ideal, but not as harsh as in regular mode. Most likely some sort of hardware acceleration is disabled.

macsforme Hi, yes, that is exactly what they did. I read an article on mrmacintosh.com about downgrading firmware to a specific version, downloaded 13.2.1 ipsw file and brought all this to a service center, where they uploaded the entire image using another Mac. As a result both "system firmware" and "OS loader" reported by system information matched the ones for Ventura 13.2.1.

macsforme

I can absolutely confirm this. MacOS Ventura update from 13.2.1 to 13.3 changed something on firmware level of my M2 MBP 13". I was able to use it for hours, but it added some high frequency flickering that's best seen with white text on black background. It's completely unusable now. I can see this flickering even I take my eyes off the screen, it takes maybe 15-30 minutes to get my sight in order after using it.

What’s worse that is seems to be irreversible. I downgraded to earlier Ventura and even Monterey. I went to service and asked them to downgrade the firmware to 13.2.1 which they did (it could be done with recovery from another mac) but nothing changed.