Mac shuts down constantly; panic (cpu 3 caller): Kernel trap

Macbook Air 2017, intel core i5

It shuts down on its own every few minutes and this error shows up.

Please help. I don't know about software so please explain what I should do step by step.


MacBook Air 13″, macOS 11.2

Posted on Aug 14, 2021 7:26 PM

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Posted on Aug 14, 2021 7:53 PM

The last started and stopped kext was !UAudio. The error report lists well over 100 kexts, some of which are Apple ones, but you seem to have installed a lot of third party kexts; the ones associated with !UAudio might have been implicated with these crashes. First thing to try is disconnect all hardware and peripherals from your Mac. Do you have a lot of Audio/Video devices or external drives connected? A hardware fault with any of them could freeze your Mac. Try to use the Mac actively for a while with no external devices attached, do the kernel panics return with no peripherals connected? Also, you can try booting into Safe Mode, which I think will disable third party kexts. I am suspecting one of your third party kexts is implicated with the crashes. To get a handle on this faster, I suggest that you download and run Etrecheck and post the output here using the "Additional text" button.


Another test you can do is create a new user and log out the old one and login as the new user and see if there are any kernel panics.


Are you using original memory and internal SSD for this Mac? If the kernel panics persist even in safe mode and with no peripherals connected, I would say that may indicate a hardware problem in the Mac. The most common Mac problem is a failing hard drive, but a bad memory chip could also cause this. You can use DriveDX to get a better handle on the physical health of your internal drive. If you can, run the Apple Hardware Test to rule out other hardware problems.


last started kext at 11024693187439: >!UAudio 405.39 (addr 0xffffff7f9f7ac000, size 315392)

last stopped kext at 11297067824863: >!UAudio 405.39 (addr 0xffffff7f9f7ac000, size 315392)

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Question marked as Top-ranking reply

Aug 14, 2021 7:53 PM in response to smbchua

The last started and stopped kext was !UAudio. The error report lists well over 100 kexts, some of which are Apple ones, but you seem to have installed a lot of third party kexts; the ones associated with !UAudio might have been implicated with these crashes. First thing to try is disconnect all hardware and peripherals from your Mac. Do you have a lot of Audio/Video devices or external drives connected? A hardware fault with any of them could freeze your Mac. Try to use the Mac actively for a while with no external devices attached, do the kernel panics return with no peripherals connected? Also, you can try booting into Safe Mode, which I think will disable third party kexts. I am suspecting one of your third party kexts is implicated with the crashes. To get a handle on this faster, I suggest that you download and run Etrecheck and post the output here using the "Additional text" button.


Another test you can do is create a new user and log out the old one and login as the new user and see if there are any kernel panics.


Are you using original memory and internal SSD for this Mac? If the kernel panics persist even in safe mode and with no peripherals connected, I would say that may indicate a hardware problem in the Mac. The most common Mac problem is a failing hard drive, but a bad memory chip could also cause this. You can use DriveDX to get a better handle on the physical health of your internal drive. If you can, run the Apple Hardware Test to rule out other hardware problems.


last started kext at 11024693187439: >!UAudio 405.39 (addr 0xffffff7f9f7ac000, size 315392)

last stopped kext at 11297067824863: >!UAudio 405.39 (addr 0xffffff7f9f7ac000, size 315392)

Aug 16, 2021 9:09 AM in response to smbchua

It would be found here:

 /Library/Application Support/DAEMONTools/DAEMONToolsService.app

Apparently, their uninstaller doesn't really uninstall anything.


However, it wasn't loaded when that panic occurred, so it has nothing to do with the panics.


Panics are primarily caused by third-party kernel extensions and hardware faults. In rare cases, it could be Apple's kernel extensions, but not likely or thousands of others would be posting the same things.

You can try resetting NVRAM which might fix a very rarely observed problem.

If that doesn't resolve the panics, you could erase the drive completely, reinstall the OS, and test before migrating anything over to it.

If it is hardware, only an Apple Store or Authorized Repair center will be able to find the cause.

Aug 16, 2021 5:38 AM in response to Barney-15E

Part of the report from the Etrecheck says

Kernel Extensions:

    /Library/Application Support/DAEMONTools/DAEMONToolsService.app

        [Not Loaded] DAEMONToolsVirtualSCSIBus.kext - com.disc-soft.DAEMONTools.VirtualSCSIBus (Disc Soft Ltd, 1.0.2 - SDK 10.16)


Diagnostics Information (past 7-30 days):

    2021-08-16 20:22:39 Kernel Panic (17 times)

        Details:

            panic(cpu 2 caller 0xffffff8012dc57d6): Kernel trap at 0xffffffb09f4e3

            3c0, type 14=page fault, registers:


        3rd party kernel extensions:

            com.disc-soft.DAEMONTools.VirtualSCSIBus


Aug 16, 2021 5:05 AM in response to Barney-15E

I uninstalled DAEMONTools using the uninstaller and the app is successfully removed. However, it crashes again and Etrecheck still found the "com.disc-soft.DAEMONTools.VirtualSCSIBus 1.0.2”.


I contacted the Disc-Soft support team and they said:

"It seems that your Mac uses a different path for the driver mentioned, or another driver was installed.

Please find the correct path for the driver that was not removed during the uninstallation process and remove it manually. "


What command do I use to search for "com.disc-soft.DAEMONTools.VirtualSCSIBus" and remove it completely?


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Mac shuts down constantly; panic (cpu 3 caller): Kernel trap

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