MacBook Air 2017 also just bricked here. It's just turned on after about an hour of on/off playing about. The recovery mode wouldn't work too, all I could get is EFI boot and net selection but no further. I noticed also my MacBook sits idle about 90 degrees so I've had to install Mac fan control and run the fan at 100% which brings it down to 60 degrees idle.
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Beta 3 bricked my iMac?
- Thread starter bradley8795
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Does this seem to be a general workaround for people that are having problems with a beta 3 upgrade installing/booting?
It worked for me. My iMac 2015 just sits on a black screen till I remove the three USB devices I have hooked up... one is a color munki display calibration device, Samsung SSD drive, and a powered USB hub.
Every time I reboot it sits on a black screen the first time I waited 10 min, before I forced shut the iMac down. Waited again, but this time noticed the USB devices were lit up. So I pulled them and the computer booted. On one occasion I connected the devices and the computer was super laggy on the login screen. I couldn't type as it took forever to get a character typed. I pulled the USB devices and it was fine. They work normally after I am logged in. I submitted a feedback report about it cause I had no issues with Beta 1 or 2.
Well, at the risk of being accused of being cowardly, having managed to update to 10.15.6 stable after a lot of faffing around from the beta versions I've just deregistered from the Beta channel as I really don't want to wake up tomorrow and find my machine has been shafted by MacOS 11.0 beta 3.
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After all the issues of this afternoon shenanigans with laggy booting like others on here have had all now seems to be well except for 2 things.
The stupidly high temps remain leaving me to use a 3rd party app to run the MacBook at 100% speed to keep it bellow 100 degrees.
The Macbook seems to have lost boot animation or there’s a issue on that part as soon as it turns on loading bar is immediately full but the macbook takes about 30-45 seconds to load. This is an improvement over this afternoon as it took around 10mins to boot or crash on booting.
The stupidly high temps remain leaving me to use a 3rd party app to run the MacBook at 100% speed to keep it bellow 100 degrees.
The Macbook seems to have lost boot animation or there’s a issue on that part as soon as it turns on loading bar is immediately full but the macbook takes about 30-45 seconds to load. This is an improvement over this afternoon as it took around 10mins to boot or crash on booting.
Nothing cowardly about that. It is a beta for a reason. I’ve been testing Windows and Mac OS for a long time and nothing phases me when issues happen. Just report and share information till it gets fixed. It’s still a good beta for me.
So it is working again. My personal issue was the RAM. Odd that it worked perfectly for months, but the update seemed to kill it, IDK how or what happened, but I removed the OWC RAM, and used just the 8GB from Apple and it booted into recovery and allowed me to get back to Catalina. Hope that possibly helps anyone else with any issues.
It could be that the updated firmware changed default ram timings for some reason to something Incompatible? Ram needs to be verified somehow to try and diagnose
Yes I did, once I finally got it back to working on Catalina I reinstalled the 32GB of ram from OWC, and it would not boot. Contacted OWC and they are sending me some replacement RAM, will see if that fixes the issue. I'm considering going ahead and making another back up now, and updating to the public beta before I get the replacement RAM to make sure that everything is working right before I put it in and fry 2 more sticks.