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Catalina 10.15.6 keeps crashing

I have a problem. I updated to macOS 10.15.6 and now my system keeps crashing when I leave my computer for some time. Here is the crash report (some data removed for privacy concerns)


panic(cpu 2 caller ): userspace watchdog timeout: remoted connection watchdog expired, no updates from remoted monitoring thread in 69 seconds, 2219 checkins from thread since monitoring enabled 44430 seconds ago after loadservice: com.apple.logd, total successful checkins since load (44430 seconds ago): 4443, last successful checkin: 10 seconds ago
service: com.apple.WindowServer, total successful checkins since load (44400 seconds ago): 4431, last successful checkin: 10 seconds ago

Backtrace (CPU 2), Frame : Return Address
......
      Kernel Extensions in backtrace:
         com.apple.driver.watchdog(1.0)

BSD process name corresponding to current thread: watchdogd
Boot args: chunklist-security-epoch=0 -chunklist-no-rev2-dev chunklist-security-epoch=0 -chunklist-no-rev2-dev

Mac OS version:
19G73

Kernel version:
Darwin Kernel Version 19.6.0: Sun Jul  5 00:43:10 PDT 2020; root:xnu-6153.141.1~9/RELEASE_X86_64


Any idea what I can do? Please help, my system is unusable. I cannot restore my workspace every few hours when I leave my computer unattended.

MacBook Pro Retina

Posted on Jul 21, 2020 3:08 PM

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Posted on Jul 29, 2020 10:11 AM

Days ago while debugging crashes I was pretty sure there was a memory leak (https://discussions.apple.com/thread/251610118). Here is what I am seeing now....


Imac27(Late 2103... 24GB ram)... No crashes since purging 32 bit applications. Running Activity monitor and watching memory allocations... Memory ramps up under heavy use, but is (Mostly) returned when apps quit... If system left logged in and unattended, memory slowly builds... but the system has enough ram to swallow it. When system logged out, memory cleaned up and next log in looks ok. Not like a fresh boot, but lots more memory available then prior to log out. Anecdotally I would say that WindowServer process is suspect, as it's memory allocation keeps growing.. Long running apps (Carbon Copy Cloner directing multi GB network backups) cause memory usage to ramp up. But system stays together. Unfortunately, the system that is the target of the network back up crashes.....


MacMini(Late 2012.... 16GB ram).... Under light use, no crashes after purging 32 bit applications. However, crashes still occurring under 2 cases.... When a usb drive attached to the mini is being used as the network target of a multi GB backup (>150GB), and when running VMware Fusion.


When the usb drive attached to the MacMini is the network backup target, the machine crashes after it receives about 130GB of backup data. Seems very repeatable. System just drops dead. Looked at logs... See nothing posted in log files for minutes on end, until hardware reset button initiates forced boot. I don't think that the process which causes the crash is caught by the OS before the system goes down...


When the MacMini is running VMware Fusion... have not established a pattern other than don't turn your back on it... We only run Win10 using Quickbooks in Fusion... Generally stays up for 15-20 minutes of use, allowing quick things to be done... if interrupted and leave the machine without logging off, will find it has crashed if not attended to within 60 minutes or so...Unlike the crash when the system is a backup target, this one seems totally random. Probably because VMware and Wind10 are pushing the system harder and in random directions.


My bottom line....


  1. if you are upgrading or have upgraded, purge all 32 bit apps and their companion crud... The system is not stable at all if a 32bit app or its agents or daemons gets touched. Absolutely huge difference in machine stability.
  2. Memory Leak Work Around..... Be very careful with long duration or cpu/memory intensive processes. While you are running them, run activity monitor and watch the 'Memory Used" number. If that approaches 60-70% of physical memory, be prepared to stop your process and log out to reset memory if you can. Lots of people are reporting crashes with VMware or Virtualbox.... but I suspect that other memory intensive apps would also be having the same problem, as I see it in a long duration process on a MacMini just accepting network data and writing to disk.
  3. Hope, keep your fingers crossed, practice what ever superstition works best for you.... and hope that APPLE fixes this bug quickly....



195 replies

Aug 26, 2020 5:29 PM in response to cesar1191

I had the same exact word for word issue. I brought it into apple, and my laptop, the 13 inch 2017 model is still under the keyboard replacement program, so they replaced my Touch Bar for me under that warranty, and it just came back, in perfect condition. So far the Touch Bar is working and my sleep is functioning as well. So I genuinely believe that the issue is a Touch Bar/Keyboard issue if everyone else is having this occur with their Touch Bar MacBook. It makes sense because the Touch Bar is always functioning, so it could have something to do with the kernel and that maybe.


***Been 3 hours of sleep and no crash. Restarted the laptop afterwards and Touch Bar is still working perfectly as well.

Aug 30, 2020 6:08 PM in response to alekseyfromsan francisco

I have been with apple for years and this latest version so bad I am ready to sell my new mac pro.

Copy and Paste...such a simple function...crashes consistently.

Finder craps out when it wants to

And the latest updates to pro codes that just came out...has all my pro apps messed up. Licesning of third party stuff shot...what a mess.

Sep 2, 2020 10:38 PM in response to alekseyfromsan francisco

Hello Have you try to disable Thunderbolt related drivers ?

In my case I have the same problem it automatically shutdown randomly So I removed all thunderbolt drive and it works well now


1) reboot with CMD+R pressed.

2) open Terminal

3) csrutil disable

4) reboot in normal mode

5 a.) sudo mount -uw /

5 b.) sudo mv /System/Library/Extensions/AppleThunderboltNHI.kext

/System/Library/Extensions/AppleThunderboltNHI.kext.BAK

6) reboot with CMD+R pressed

7) csrutil enable

8) reboot normally


If you still encounter issue try to remove all file that contain Thunderbolt name in it

Sep 2, 2020 11:57 PM in response to DhairyaSenjaliya

DhairyaSenjaliya wrote:

Hello Have you try to disable Thunderbolt related drivers ?
In my case I have the same problem it automatically shutdown randomly So I removed all thunderbolt drive and it works well now

Thank you for this suggestion. Just to be more clear about this: Do you use any (USB or Thunderbolt) hardware on your USB-C ports other than the charging cable? If you do: Did your Mac crash even when nothing was plugged in?

Sep 3, 2020 1:57 PM in response to BowAndArrow

I likewise installed update on my MacBook Pro and it crashes after period of no use... everything is locked up and I have to do a hard reset... also have lost use of my webcam within the past week.... tried all of the camera reset options but is not recognized by my apps that use the camera. Not necessarily attributing camera issues with updates. However, the timing of these issues might be more than coincidence. I stream video with HULU and for 3 days, Hulu could not confirm my location and would not allow me to stream... again, not sure why the problem was happening but couldn't get anywhere with troubleshooting....

I thought only PCs have these problems... Apple! You're letting me down.

Sep 5, 2020 10:01 AM in response to frtzn

frtzn wrote:

Following a hint from another thread, it becomes more and more likely that either Microsoft Office or Adobe Creative Cloud is the software responsible for the crashes.

On 20 August, I wiped my HD and did a clean install of Catalina 10.15.6 on my MacBook Air.


Every few days, I installed a couple more applications: VLC, Google Chrome, Mullvad VPN, Thunderbird, Little Snitch, Micro Snitch, BBEdit, Transmission, Google Earth, BlueHarvest, Swinsian, Moom, Zoom, Fujifilm X Webcam.


For nine days, I had no kernel panic.


On August 29, I installed Adobe Creative Cloud. My Mac immediately started to behave oddly, e.g. the screen froze for about a minute each time I woke the computer up from sleep. Four days later, I had another kernel panic.


I uninstalled Adobe Creative Cloud, and the freeze-on-wakeup issues are gone again. I will use the Mac like this for the next days, checking if it crashes again. At the moment however, it seems to me that Adobe is the cause for those kernel panics.

Sep 22, 2020 7:16 AM in response to alekseyfromsan francisco

My mac crashed the first 5 minutes after the install (a while back). After that it stayed up. It has crashed 3 times since then.


I am writing now because it crashed shortly after booting up and turning on some music in my Chrome Browser.


I'm on a Macbook Pro 2019 i7 - It might be too old - Apple I think only tests software in 6 month manufacture iterations apparently. :thumbs-down:

Sep 22, 2020 7:41 AM in response to nathanh0

3rd crash in 30 minutes.


Narrowing it down to an external hard drive. Trying to now wipe my time machine disk, it can't even eject it.


Apple you guys probably need to see if you guys know how to read external hard drives without crashing the whole computer. This might be something to add in your OS after 20 years (or maybe you should have never made Catalina because this OS sucks)

Sep 28, 2020 11:32 PM in response to alekseyfromsan francisco

I too am getting the panic crashes, and it's happening on both my 2020 MacBook Air and MacBook Pro (see discussion). Level 10 Tesserax suggested pulling the plug on FileStream, removing it from my hard drive completely, and seeing if the same issue resumes. So far, NO issues. The mac is good as new. This is clearly some hiccup in the FileStream protocols. I heard elsewhere it might be because FileStream is sucking the CPU while restoring files. Did you happen to be installing FileStream for the first time on your hard drive when the crashes took place?


To be clear, I'm running Catalina 10.15.7, and my crashes began the moment after I started syncing my FileStream account. I can't say for certain, but it seems oddly conspicuous that after having the MacBook Pro reimaged by my tech department, the random freezes and shutdowns resume within hours of redownloading FileStream. But the moment I remove FileStream from my hard drive, the issues completely stop.

Catalina 10.15.6 keeps crashing

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