WARNING macOS Catalina 10.15.4 Supplemental Update BRICKED my 13 inch Macbook 2018!

[chscag]

I download the software first, quit the internet then do the install. Much safer and quicker IMHO.

And how would you do that with this supplemental update? It seems to me that it installs and updates at the same time?

 

[jdogg836]

The supplemental update did take much longer than it should have. And several times during the update process the screen went black and appeared to have shut down. But eventually it started up again. That whole process was worse than some firmware updates I have done before. However, now everything is okay and up and running on my iMac.

I'm wondering if this is what causes the issue, users interrupting it because it looks shut down and that causing it to drop out mid-install.

 

[flowrider]

And how would you do that with this supplemental update? It seems to me that it installs and updates at the same time?

From here:

Manuals, Specs, and Downloads - Apple Support

Manuals, technical specifications, downloads, and more for Apple software and hardware

support.apple.com

I downloaded and installed:

Download macOS Catalina 10.15.4 Combo Update - Apple Support

macOS Catalina 10.15.4 introduces iCloud Drive folder sharing, Screen Time communications limits, Apple Music time-synced lyrics view, and more. The update also improves the stability, reliability, and security of your Mac.

support.apple.com

Updates such as this one which updates the T2 chip on Macs often requires that the internet be connected in order to check the signature of the firmware.

I have a 2019 NcMP with the T2.

I'm wondering if this is what causes the issue, users interrupting it because it looks shut down and that causing it to drop out mid-install.

Hence my post on the preceding page asking folks to be patient.

Lou

 

[chscag]

Okay, great tip. Thanks.

 

[hellfried]

Installed the update on my 13" MBP 2019 with no issues.

 

[me55]

Updates such as this one which updates the T2 chip on Macs often requires that the internet be connected in order to check the signature of the firmware.

The installer also verifies that the downloaded file is not corrupted before installing.

 

[SoYoung]

For me since the supplemental update I have random reboots on my iMac late 2015. Anyone else? I also had a system crash on normal 10.15.4 update.

 

[Taz Mangus]

For me since the supplemental update I have random reboots on my iMac late 2015. Anyone else? I also had a system crash on normal 10.15.4 update.

If you boot into safe mode do you still get the crashes?
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From here:

Manuals, Specs, and Downloads - Apple Support

Manuals, technical specifications, downloads, and more for Apple software and hardware

support.apple.com

I downloaded and installed:

Download macOS Catalina 10.15.4 Combo Update - Apple Support

macOS Catalina 10.15.4 introduces iCloud Drive folder sharing, Screen Time communications limits, Apple Music time-synced lyrics view, and more. The update also improves the stability, reliability, and security of your Mac.

support.apple.com

This is how I am planning to apply the supplemental update with the combo update.

 

[jat80]

I attempted to install the update but about halfway through my computer shutdown and it bricked my 2018 13 inch MacBook. I waited two hours then attempted to power on my computer. However, there was no power, no fans coming on and off or anything when pressing and holding the power button. It was plugged and fully charged while updating. Anyone else having this problem? Also attempted to do a SMC reset to no avail still won't turn on. I am sending it in for repair. I would hold off updating unless you want to risk losing your computer for a week.

I have a 2018 13” MacBook Pro TB running Mojave. I did the security update 2020-002 dated 24/03/20 and it didn’t reboot. Tried everything to boot it up again and would not restart. Called Apple tech support then ended up taking it to approved repairer. They got back to me advising that the update bricked my computer and it needs a new logic board and have ordered one for me under warranty. Seriously WTF. ??‍♂️??‍♂️

 

[Bo6340]

Haven’t talked with Apple’s help team since 2004—today we spent 2 hours on the phone—we tried every method to get my bricked 2018 15” MacBook Pro to boot. Hopefully this issue is a small epidemic and not a pandemic; the MBP became unresponsive today while updating to 10.15.4. The last thing I saw before the MBP went quiet and the screen went black was, “about 14 minutes remaining”. Apple Help quoted $815 to ship it to them for a diagnostic and repair. I explained it was working perfectly well before the update—CSR elevated it to a senior who is starting with a new charger and cable. I explained several times that I charge it from two LG UltraFine 5k usb-c displays.

 

[therauch1]

I think the same happenend to my Macbook Pro 13“ 2016. I can‘t really tell as I have auto-updates enabled. But the thing is my Touch Bar starts up and I can connect to a second monitor and the system works (no fans spinning up though and getting really hot). Can anybody check this with their Macbook Pro and a second display?

 

[cornish1]

I have a neighbours 2013 MacBook Pro (A1502) that has coincidentally had issues since this update.

If I reset SMC it will power on but usually only remains on for a few seconds, just about long enough to get to the login screen but never long enough to type in the password. Oddly it stays on longer if I boot with Shift key down but again shuts down before I'm able to enter login password fully.

Battery is good/charged & power adaptor connected with green led.

Have tried booting from external & all the key combo startups known to man (https://www.idownloadblog.com/2016/05/23/mac-startup-key-combinations/) but stuck - even target disk mode only stays awake for a few seconds.

Any suggestions ? Thanks, Tim

 

[KPOM]

For me since the supplemental update I have random reboots on my iMac late 2015. Anyone else? I also had a system crash on normal 10.15.4 update.

Yes. I have had lots of restarts on my 2019 13” MacBook Pro, both before and after the supplemental update. 10.15.4 has been a bit of a disaster release. Hopefully Apple is focusing on stability rather than new features for 10.16.

 

[MisterSavage]

This didn't happen when I upgraded to Catalina but it absolutely did when I upgraded to Mojave. I upgraded and everything seemed fine. Then I upgraded again because there was a supplemental update. That's what killed my iMac. I ended up having to lug it to the Apple Store where they ended up wiping the hard drive after running some diagnostics. It's so confusing because I would have thought that the main update would have been the one that killed me. Either way I'm too gun-shy to update anymore during a pandemic.

 

[Apple fanboy]

This didn't happen when I upgraded to Catalina but it absolutely did when I upgraded to Mojave. I upgraded and everything seemed fine. Then I upgraded again because there was a supplemental update. That's what killed my iMac. I ended up having to lug it to the Apple Store where they ended up wiping the hard drive after running some diagnostics. It's so confusing because I would have thought that the main update would have been the one that killed me. Either way I'm too gun-shy to update anymore during a pandemic.

Very wise. Wish I’d waited on my Mac mini. Hopefully being collected this week for repair. No idea when it will be back though.

 

[pdxplm]

No issues on a 2015 MacBook, Late 2013 13" MBP, 2015 15" MBP, and a 2012 Mac mini. I was on Mojave until .3 came out and then no issues with Catalina. So many bugs with this version and it's sad...

 

[Taz Mangus]

Just applied the supplemental update using the combo updater on a 2015 MacBook Pro. Took about 30mins to complete. No issues to report so far.

 

[lowendlinux]

I worked OK on my '18 Mini..installed via the terminal

 

[Apple fanboy]

I worked OK on my '18 Mini..installed via the terminal

Must be nice. Out of interest why did you install via terminal? Is that generally a safer option?

 

[lowendlinux]

Must be nice. Out of interest why did you install via terminal? Is that generally a safer option?

I install that because it’s generally faster and I don’t seem to have the problems that get brought on the internet

 

[w1z]

Very wise. Wish I’d waited on my Mac mini. Hopefully being collected this week for repair. No idea when it will be back though.

Did you try restoring your Mac mini’s T2 using the Apple configurator 2 app?

There’s a YouTube video somewhere in this thread that shows you how to do it.

 

[Apple fanboy]

I install that because it’s generally faster and I don’t seem to have the problems that get brought on the internet

Maybe I’ll do that next time when I get my Mini back. Mind you I’ll not be installing any more updates until the Apple store is open.
Having no computer sucks when you are home 24/7.
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Did you try restoring your Mac mini’s T2 using the Apple configurator 2 app?

There’s a YouTube video somewhere in this thread that shows you how to do it.

You need a USB c MacBook to do that. My mini is completely dead. No light, nothing.

 

[w1z]

Maybe I’ll do that next time when I get my Mini back. Mind you I’ll not be installing any more updates until the Apple store is open.
Having no computer sucks when you are home 24/7.
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You need a USB c MacBook to do that. My mini is completely dead. No light, nothing.

So was the MacBook Pro in the repair video but any mac with a USB/USB-C port should work as you just need to get to the revive option for the device to revive.. worth a try, just make sure the mini is plugged in to the AC power outlet when attempting to revive/restore it.

Edit: for the Mac mini, connect the usb-c port nearest to the hdmi port to any Mac running AC 2 using either usb-a to usb-c or usb-c to usb-c and then put the mini into DFU mode.

To enter DFU mode (not recovery), unplug the power cord, connect the usb-c cable then while pressing the power button reconnect the power cord and keep pressing power for 3 seconds. The mini should enter DFU mode and also appear on the configurator app, right click and revive device

 

[wegster]

No problems here on a 16" MBP, although it did take a while - and had me concerned on length of time it was seemingly doing nothing. Realizing there were several firmware updates accompanying it might explain that.
Been running w/out issue for a few days now.

 

[Apple fanboy]

So was the MacBook Pro in the repair video but any mac with a USB/USB-C port should work as you just need to get to the revive option for the device to revive.. worth a try, just make sure the mini is plugged in to the AC power outlet when attempting to revive/restore it.

Edit: for the Mac mini, connect the usb-c port nearest to the hdmi port to any Mac running AC 2 using either usb-a to usb-c or usb-c to usb-c and then put the mini into DFU mode.

To enter DFU mode (not recovery), unplug the power cord, connect the usb-c cable then while pressing the power button reconnect the power cord and keep pressing power for 3 seconds. The mini should enter DFU mode and also appear on the configurator app, right click and revive device

That’s the issue. No other Mac in the house with USB c. Plus it’s a work MacBook Air so not really mine.