2020-004 update problem

Dear all,

I had the same problem for months now and finally found a solution. Open the terminal and then:

# Deleting the current user's caches
rm -rf ~/Library/Caches/*
# Deleting the macOS launch services database(s) and recreating them
sudo /System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.fra mework/Support/lsregister -kill -seed -lint -r -f -v -dump -domain local -domain system -domain user -domain network
# Restarting the macOS Dock
killall Dock
# Reindexing Spotlight
sudo mdutil -E /
# Rebooting the system. Have replaced it with a command instead
sudo shutdown -r now
# Running the software update to install all updates. Remember to reboot when prompted
sudo softwareupdate -i -a --verbose
# The update should reboot the system a couple of times and take approximately 10 to 30 mins

Have fun with your Macs now shutting down properly.

Same problem on 2010 27" i7 iMac

This worked for me

I had to erase and format (APSF) my Startup Volume (Samsung 1TB SSD) reinstall a full new version of High Sierra (the undocumented version 17G66) in Recovery Mode, which brought up some error log which I sent to Apple.

*** Panic Report ***

panic(cpu 2 caller 0xffffff800f2b8220): "a freed zone element has been modified in zone kalloc.4096: expected 0xdeadbeefdeadbeef but found 0xdeadbeefceadbeef, bits changed 0x10000000, at offset 24 of 4096 in element 0xffffff80391d4000, cookies 0x3f0011dd73a016e0 0x53521c4435cb70b"@/BuildRoot/Library/Caches/com.apple.xbs/Sources/xnu/xnu-4570.71.82.5/osfmk/kern/zalloc.c:1122

High Sierra installed correctly in a second try, which ocurred automatically. The Security Update 2020-004 from the App store then also installed fine. macOS 10.13.6 (17G14019).

I then migrated my old system from the backup disk (not Time Machine) to the iMac. This went smoothly, took some hours though (Firewire 800 Backup drive Lacie d2).

Then the file permissions on my second internal hard drive were totally chaotic. I could not access the files nor change the permissions. I formatted the 2nd internal HD and tried to copy from backup via CCC. This did not change the permissions.

I had to format the 2nd internal drive again. I then copied all files from the backup with drag and drop to the 2nd internal drive. This finally fixed all the file permissions.

Done. 2 days work.

Yes, marcelofares,

booted my mid 2011 iMac in safe mode (shift key at boot),

downloaded the 2020-004 update package from Apple's support downloads (https://support.apple.com/downloads),

installed the security update package and when the display went black I left it running for 37 minutes (timed it) until the display turned itself back on.

Different computer configurations may make the black/blank screen last longer or shorter depending on processor speed and fusion drive/non-fusion drive configurations. For this reason I'd leave the Security Update 2020-004 running several hours before giving up on it.

Yes, it completed the update process. I think the first time I got the blank screen I assumed it had crashed so forced my iMac off. This time I just let the Security Update 2020-004 run with the blank/black screen until the screen turned back on by itself.

The same thing happened to me since late April. The begging it was a slowing down of the IMac (27, 2011, i7, 16 GB memory), Later it is stuck on the loading bar logo.

I tried logging into the recovery mode and re-installing from a backup, but the issue resurfaces after the update. I had done a complete secure erasing of the hard drive, which also didn’t help.

Of course, I tried all the standard troubleshooting but no luck.

Eventually,

I found this solution from 2018, which in short, the cache files build up and create too many unused and can’t be used files, aka the terms “Too many corpses being created.”

i did what the post suggested. It is working.....so far.

here is the post:

https://discussions.apple.com/thread/8204994

Other helpful troubleshooting on this page “MacBook Stuck on Apple Logo & Won’t Boot? Here’s a Fix”:

https://appletoolbox.com/macbook-stuck-apple-logo-wont-boot/

That is almost always due to a 3rd Party plist hanging because something changed with the update.

EtreCheck is a FREE simple little diagnostic tool to display the important details of your system configuration and allow you to copy that information to the Clipboard. It is meant to be used with Apple Support Communities to help people help you with your Mac. It will not display any personal info.

https://www.etrecheck.com/

Pastebin is a good place to paste the whole report if you capture the URL while there…

https://pastebin.com/

Whew, they've changed pastebin & made it harder, but after pasting in, click Create new paste button, then Embed button, then copy the URL...

<script src="https://pastebin.com/embed_js/KuvnghqA"></script>

The important part is...

https://pastebin.com/embed_js/KuvnghqA

Workable but harder for me to work with...the Note tool on the bottom of this editor's toolbar, as shown in the image, to copy and paste the output from EtreCheck. In a Reply before you click post, look for this to add longer texts...

I've had a similar problem.

I updated my Mac mini 2012 (connected via miniDisplayPort to an HP Z27 display), and the progress bar was stuck forever.

After a little more than one hour, I used the POWER button to shut the Mac down, then turn it on.

The display remained black. When pressing the trackpad, the mouse point appeared.

I was not able to boot it in Recovery mode (the screen didn't even show an image). Neither Save Mode was possible.

However, I was lucky enough to have another (older) display (an HP LP2475w, connected via HDMI), and it worked better. Or something did change in the meantime.

The Apple logo and the progress bar did appear. But it was stuck. I reboot in safe mode, and this time the progress bar went on, up to 100%, after probably having done some disk assistance. But then it was stuck for nearly one hour.

I could reboot in Recovery Mode, and let Disk First Aid check the disk. The disk was OK, apart for a series of warning (of the type: "inode_val: object (oid 0x200ae373a): invalid bsd_flags (0x10)"). I'm not sure if these are serious issues (they are warnings, not errors). They are often reported to be caused by MS OneNote, but I don't use it; however, I use Office online.

After this, I could reboot in normal mode. Everything seems fine at the moment. TimeMachine is preparing a backup since forever, but maybe this is normal after all that mess.

Paolo

marcelofares, no, I was saying I hadn't had a problem with my iMac's display going black since 10 days.

The Security Update 2020-004 did successfully install after waiting 37 minutes at its blank/black screen during install.

every thing failed, I ended up upgrading my old fusion hard drive into SSD type.

i did it a home, worked as a charm.

In the mean time and hoping not to insult anyone who tried all of these - Try These Quick Tips To Shut Down Your Mac Properly

• Close all open apps, then try shutting down
• Reset both SMC 
• https://support.apple.com/en-au/HT201295
• Notebook computers with the T2 chip
• Before resetting the SMC, try these steps:
• Shut down your Mac.
• Press and hold the power button for 10 seconds, then release the button.
• Wait a few seconds, then press the power button to turn on your Mac.
• If the issue persists, follow these steps to reset the SMC:
• Shut down your Mac.
• On your built-in keyboard, press and hold all of the following keys. Your Mac might turn on.
• Control  on the left side of your keyboard
• Option (Alt)  on the left side of your keyboard
  • Shift  on the right side of your keyboard
• Keep holding all three keys for 7 seconds, then press and hold the power button as well. If your Mac is on, it will turn off as you hold the keys.
• and NVRAM
• Run Apple Diagnostics or Apple Hardware Test
• Perform a Safe Boot
• Use Some Terminal Commands which I have to find because recently I was black screened and I found a post with two terminal commands that got me back on the road. It was an emergency as I was in the field and Apple were advising a clean install which I had no time for.

or just wait for the next security release. It sounds as we are all vintage Mac users perhaps in machine and human ageing.

This did occur in safe mode too.

Reinstalled security update yet again, and 'hey presto' my MacBook is working perfectly again. No idea what the exact problem was. But glad it's fixed now! Phew..

There is a blank in "framework". The command is

# Deleting the macOS launch services database(s) and recreating them
sudo /System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Support/lsregister -kill -seed -lint -r -f -v -dump -domain local -domain system -domain user -domain network

Wait even a few hours. The time needed seems to be really unpredictable.

On the older user...

Safe Boot, (holding Shift key down at startup), does the problem occur in Safe Mode?