Catalina 10.15.4 Supplemental Update Has Issues

Just to add that this update bricked by 2019 13" rMBP. Awaiting a UPS mail-in box to send it in for repair. There is a remedy on MacRumours involving DFU mode and Apple Configurator but I don't have another USB C mac in the house!

I did the update to my 2018 Mac mini, shut it down and unplugged it due to incoming storms last night. This morning it is a brick. No light, sounds, totally dead. I have to work from home and all Apple support did was have me try to zap the PRAM. I’ve been scouring the internet for help and I’m finding a lot of folks with the same problem. With everyone working from home due to COVID-19, Apple needs to fix this now! Tim Cook, please get on this!

For what it's worth: here installed the supplemental update macOS Catalina 10.15.4 on a MacBookAir (2017 model) on 09 April and on a MacBook Pro (late 2013 model) on 12 April, with both I have no problems.

At the time of the update only an external hard drive that functions as a Time Machine is connected.

I updated my MacBook Pro 2018 and it turned itself off, and is now bricked. (The power button doesn't respond at all, either with or without any other keys pressed. The battery is fully-charged and the laptop is connected to mains power.)

Sorry to hear about this man. That's frustrating. I hope you have a backup to fall back to if no solution in the short time.

For me my iMac 4K Retina updated without a problem as some have reported that they had not issue. But my MacBook Air 2013 refused to update. I tried it more than 4 times, it just restarts and update does not apply. This happened I think with the first release of Catalina and as some have stated, I've not had this issue before where any of my Mac won't update.

I've noticed a decline in quality not only on MacOS but on tvOS, iOS, iPadOS and WatchOS. I report every time but am tired. They are just too much that I don't bother anymore. I just make sure I have a backup in case things go south. This is my personal view so you may not agree but  seems to be focussing on money first, quality later from my personal view. So they still value quality but it comes second place after money. The thing is quality will bring in the money but money may not always bring in the quality. I might be wrong but it's what I've observed for some years now. I hope am wrong because I've enjoyed computing since I moved to  since 2008. Anyhow, for my personal computing, they are still by far the best but I have to call them out when I have reason to. My friends and colleagues were surprised. They said to me: Oh, I thought  could do no wrong. I said that was a wrong assumption. Just because I speak good of  and with good reason does not mean that when they make mistakes which everyone does, that I won't call them out. Anyway these are my personal views so you may not agree.

Glad you were able to get your Mac back online!

One quick note, I updated my article to explain the data erase thing. With Apple Configurator 2 version 2.12.1 it changed the restore option to reinstall BridgeOS and erase all OS and user data.

You now have to use the Revive option, this option only reinstalls BridgeOS but retains OS and User data.

https://mrmacintosh.com/how-to-restore-bridgeos-on-a-t2-mac-how-to-put-a-mac-into-dfu-mode/

My 2019 16-inch MBP reboots randomly from sleep mode. I'll shut the laptop and go to open it again a bit later, seeing that I have to sign in after a full re-boot. This happened to me 3 times today. I keep getting messages like "an error has occurred" and it asks me to send apple a report of what happened. Also, I'm pretty sure this auto-installed on my computer because I never would have done this voluntarily with so many known issues.

Maybe you can turn off auto update? Auto download can be turned on but then you manually install it after backing up. Am hoping these are just random issues with  updates and not become a new normal.

I Too am having issues.. 2019 MacBook Pro, will not take the supplemental update. Machine will appear bricked, after doing multiple attempted commands (forced restart, restore mode, safe mode) it randomly starts up hours later with the update not completed, this has happened close to 10 times. I have turned off auto update for now as I can't afford to brick my machine

Hi Barney,

If I zoom in and zoom out the display and it was lag.

and CPU 103%. I don't know why. It's my first time to use MAC laptop.

please find my recording: https://mega.nz/file/jW4j3SjB#3xjciEMUE8Pvzb3dGbXJXuNcDJorpc0DCCnvDJV7RxM

Wynne

Does anyone know if the new update 10.15.5 handles these issues? Or do more issues crop up? Has anyone who had start up issues with the 10.15.4 supplemental update installed the new update? I am really nervous about any new update coming now...

Try booting into Safe Mode and download and apply the macOS Catalina 10.15.5 Combo Update.  The Combo updates are the safest to apply as they contain all of the updates since 10.15.0.