Apple fried my computer Again!


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I posted this on another forum but no replies so thought I would try here:

Automatic Big Sur update, now will computer not boot. Long story will just try to make it shorter:

Late 2015 imac had been updated to Big Sur Beta from Catalina: then last year Big Sur beta update (2.something I think) caused looping. (possibly due to Norton).

Tried everything found on internet. Finally had to erase all and migrated from my 2019 apple laptop air which is running Big Sur.

When trying everything to fix the problem last year I must have used something from my older 2013 imac because now my 2015 imac thinks it is not compatible with Big Sur and Disk Utility says I have to reinstall El Captain. (I ran repair on everything listed) my Mackintosh HD was not there just data disk and (my passport disk which I had originally used with the 2013 imac. I would install El Captain and update until at least Catalina to get my computer back... BUT ... using Disk Utility it only finds the mypassport backup disk which it says it cannot install to.

There have been a couple of updates to Big Sur that went smoothly until this one.

I am at a total loss. I am getting older and cannot remember how I migrated my OS last time. My computer is now a circus and I am feeling like a clown for allowing an automatic update which I thought I had disabled. I am beginning to dislike Apple as much as Windows!

I live 125 or so miles from the nearest apple repair and with Covid I am not even sure they are open. I am Apple poor and do not want to purchase a new one.

Anyone else have a problem with this update or have any idea how to fix this?
 
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Cory Cooper

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Hello and welcome.

-Which exact 2015 iMac model?
-Do you have a current Time Machine or other backup of your iMac data? Do you need to save any of it?
-Are you trying to keep the iMac and MacBook Air (MBA) in sync?

Yes, Norton has been known to cause slowness and other issues, especially when run in "live" mode.

If you don't need any data on the iMac, it may be best to completely start over. You can create a USB installer for Catalina two ways:
-How to create a bootable installer for macOS
-DiskMaker X (Big Sur is not supported by DiskMaker X)

You can then completely erase the iMac drive, install Catalina, then upgrade it to Big Sur using Software Update. If you want to migrate users/applications from the MacBook Air, make sure you create a user with a different name in the steps above. That way, you can use Migration Assistant to migrate your current MBA user without any conflicts due to having the same user name on both Macs.

C
 
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Thank you Cory Cooper.
My imac is a 27" desktop late 2015. I do have a time machine back up on a mypassport disk. I don't really have to keep the laptop in sync with my desktop. (it is running Big Sur without any problems. I removed Norton after the first problem (last year) with big sur beta so it should not be the cause of this one.

This machine just does not like big sur! I erased the drive and reinstalled Big Sur. Then I started having panic kernel every 15 min. I now have erased everything and installed Catalina. All is fine with catalina except I still have a panic kernel every 15 min or so. This prevents me from restoring any of my data through time machine disk or through migration from my laptop. I can deal with that in other ways but cannot figure out what is causing the panic kernel. It appears that something is timing out. Is it ok to post the panic data here for someone to look at?
 
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Cory Cooper

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OK, thanks.

Sure - feel free to post the panic data here, we'll take a look and see if anything sticks out.

Do you have any third-party RAM installed by chance?

C
 
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OK, thanks.

Sure - feel free to post the panic data here, we'll take a look and see if anything sticks out.

Do you have any third-party RAM installed by chance?

C
Yes, I updated my ram a years ago. Here is the Panic Kernel info:

panic(cpu 2 caller 0xffffff8002c12667): "AppleAHCIDiskQueueManager::setPowerState(0xffffff8031803b40 : 0xffffff7f83dab5d2, 3 -> 2) timed out after 100270 ms"@/AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/xnu/xnu-6153.141.2.2/iokit/Kernel/IOServicePM.cpp:5296
Backtrace (CPU 2), Frame : Return Address
0xffffff82bea93b40 : 0xffffff800251868d
0xffffff82bea93b90 : 0xffffff8002652ab5
0xffffff82bea93bd0 : 0xffffff800264463e
0xffffff82bea93c20 : 0xffffff80024bea40
0xffffff82bea93c40 : 0xffffff8002517d57
0xffffff82bea93d40 : 0xffffff8002518147
0xffffff82bea93d90 : 0xffffff8002cbf2bc
0xffffff82bea93e00 : 0xffffff8002c12667
0xffffff82bea93e50 : 0xffffff8002c11f49
0xffffff82bea93e60 : 0xffffff8002c294de
0xffffff82bea93ea0 : 0xffffff8002c10cf8
0xffffff82bea93ec0 : 0xffffff800255a645
0xffffff82bea93f40 : 0xffffff800255a171
0xffffff82bea93fa0 : 0xffffff80024be13e

BSD process name corresponding to current thread: kernel_task

Mac OS version:
19H15
Kernel version:
Darwin Kernel Version 19.6.0: Thu Oct 29 22:56:45 PDT 2020; root:xnu-6153.141.2.2~1/RELEASE_X86_64
Kernel UUID: 9B5A7191-5B84-3990-8710-D9BD9273A8E5
Kernel slide: 0x0000000002200000
Kernel text base: 0xffffff8002400000
__HIB text base: 0xffffff8002300000
System model name: iMac17,1 (Mac-DB15BD556843C820)
System shutdown begun: NO
Panic diags file available: YES (0x0)

System uptime in nanoseconds: 1148708022209
last loaded kext at 576496005413: >!U!SCoexistentDriver 489.120.1 (addr 0xffffff7f84697000, size 28672)
loaded kexts:
>!U!SCoexistentDriver 489.120.1
@filesystems.smbfs 3.4.4
>!ATopCaseHIDEventDriver 3430.1
>DiskImages.SparseDiskImage 493.0.0
>DiskImages.ReadWriteDiskImage 493.0.0
>DiskImages.CryptoEncoding 493.0.0
>DiskImages.UDIFDiskImage 493.0.0
>DiskImages.HTTPBackingStore 493.0.0
>DiskImages.RAMBackingStore 493.0.0
>DiskImages.FileBackingStore 493.0.0
>!AUpstreamUserClient 3.6.8
@kext.AMDFramebuffer 3.1.0
>AudioAUUC 1.70
@kext.AMDRadeonX4000 3.1.0
@kext.AMDRadeonServiceManager 3.1.0
>!AGraphicsDevicePolicy 5.2.6
@AGDCPluginDisplayMetrics 5.2.6
@fileutil 20.036.15
>!AHV 1
|IOUserEthernet 1.0.1
|IO!BSerialManager 7.0.6f7
>AGPM 111.4.4
>!APlatformEnabler 2.7.0d0
>X86PlatformShim 1.0.0
>pmtelemetry 1
>!AHDAHardwareConfigDriver 283.15
>!AMikeyHIDDriver 131
>!A!ISKLGraphics 14.0.7
@Dont_Steal_Mac_OS_X 7.0.0
>AGDCBacklightControl 5.2.6
>!AHDA 283.15
>ACPI_SMC_PlatformPlugin 1.0.0
>!AMikeyDriver 283.15
>!ABacklight 180.3
>!AThunderboltIP 3.1.4
|Broadcom!B20703USBTransport 7.0.6f7
|!ABCM5701Ethernet 10.3.5
>!A!IPCHPMC 2.0.1
>eficheck 1
>!ASMCLMU 212
>AirPort.BrcmNIC 1400.1.1
@kext.AMD7000!C 3.1.0
>!A!ISKLGraphicsFramebuffer 14.0.7
>!A!ISlowAdaptiveClocking 4.0.0
>!AFIVRDriver 4.1.0
>!AMCCSControl 1.14
@filesystems.autofs 3.0
|IO!BUSBDFU 7.0.6f7
|SCSITaskUserClient 422.120.3
>!AFileSystemDriver 3.0.1
>!AVirtIO 1.0
@filesystems.hfs.kext 522.100.5
@!AFSCompression.!AFSCompressionTypeDataless 1.0.0d1
@BootCache 40
@!AFSCompression.!AFSCompressionTypeZlib 1.0.0
>!ASDXC 1.7.7
@filesystems.apfs 1412.141.1
@private.KextAudit 1.0
>!AAHCIPort 341.140.1
>!AACPIButtons 6.1
>!ARTC 2.0
>!ASMBIOS 2.1
>!AACPIEC 6.1
>!AAPIC 1.7
$!AImage4 1
@nke.applicationfirewall 303
$TMSafetyNet 8
@!ASystemPolicy 2.0.0
|EndpointSecurity 1
|IOUSBMass!SClass 4.0.4
>!A!BHIDKeyboard 209
>!AMultitouchDriver 3440.1
>!AInputDeviceSupport 3440.8
>!AHS!BDriver 3430.1
>IO!BHIDDriver 7.0.6f7
>DiskImages.KernelBacked 493.0.0
@kext.AMDRadeonX4030HWLibs 1.0
@kext.AMDRadeonX4000HWServices 3.1.0
>!UAudio 323.4
>!AGraphicsControl 5.2.6
|IOAVB!F 850.1
@plugin.IOgPTPPlugin 840.3
>DspFuncLib 283.15
@kext.OSvKernDSPLib 529
>IOPlatformPluginLegacy 1.0.0
@!AGPUWrangler 5.2.6
>!ABacklightExpert 1.1.0
|IONDRVSupport 576.1
>!AHIDKeyboard 209
>!AHDA!C 283.15
|IOHDA!F 283.15
>X86PlatformPlugin 1.0.0
|Broadcom!BHost!CUSBTransport 7.0.6f7
|IO!BHost!CUSBTransport 7.0.6f7
|IO!BHost!CTransport 7.0.6f7
|IO!B!F 7.0.6f7
|IO!BPacketLogger 7.0.6f7
|IOEthernetAVB!C 1.1.0
>IOPlatformPlugin!F 6.0.0d8
>!ASMBusPCI 1.0.14d1
|IO80211!F 1200.12.2b1
>mDNSOffloadUserClient 1.0.1b8
>corecapture 1.0.4
|IOSkywalk!F 1
@kext.AMDSupport 3.1.0
@!AGraphicsDeviceControl 5.2.6
|IOAccelerator!F2 438.7.3
|IOSlowAdaptiveClocking!F 1.0.0
>!ASMBus!C 1.0.18d1
|IOGraphics!F 576.1
>!AThunderboltEDMSink 4.2.3
@kext.triggers 1.0
>usb.IOUSBHostHIDDevice 1.2
>usb.!UHub 1.2
>usb.cdc 5.0.0
>usb.networking 5.0.0
>usb.!UHostCompositeDevice 1.2
|IOAudio!F 300.2
@vecLib.kext 1.2.0
|IOSerial!F 11
|IOSurface 269.11
@filesystems.hfs.encodings.kext 1
>!AThunderboltDPOutAdapter 6.2.6
>!AThunderboltDPInAdapter 6.2.6
>!AThunderboltDPAdapter!F 6.2.6
>!AThunderboltPCIDownAdapter 2.5.4
>!AThunderboltNHI 5.8.6
|IOThunderbolt!F 7.6.1
>!A!ILpssI2C 3.0.60
>!AXsanScheme 3
|IOAHCIBlock!S 316.100.5
>usb.!UHostPacketFilter 1.0
>!A!ILpssGspi 3.0.60
|IOUSB!F 900.4.2
|IOAHCI!F 290.0.1
>usb.!UXHCIPCI 1.2
>usb.!UXHCI 1.2
>!AEFINVRAM 2.1
>!AEFIRuntime 2.1
|IOSMBus!F 1.1
|IOHID!F 2.0.0
$quarantine 4
$sandbox 300.0
@kext.!AMatch 1.0.0d1
>DiskImages 493.0.0
>!AFDEKeyStore 28.30
>!AEffaceable!S 1.0
>!ASSE 1.0
>!AKeyStore 2
>!UTDM 489.120.1
|IOSCSIBlockCommandsDevice 422.120.3
>!ACredentialManager 1.0
>KernelRelayHost 1
>!ASEPManager 1.0.1
>IOSlaveProcessor 1
|IOTimeSync!F 840.3
|IONetworking!F 3.4
|IOUSBMass!SDriver 157.140.1
|IOSCSIArchitectureModel!F 422.120.3
|IO!S!F 2.1
|IOUSBHost!F 1.2
>!UHostMergeProperties 1.2
>usb.!UCommon 1.0
>!ABusPower!C 1.0
|CoreAnalytics!F 1
>!AMobileFileIntegrity 1.0.5
@kext.CoreTrust 1
|IOReport!F 47
>!AACPIPlatform 6.1
>!ASMC 3.1.9
>watchdog 1
|IOPCI!F 2.9
|IOACPI!F 1.4
@kec.pthread 1
@kec.Libm 1
@kec.corecrypto 1.0
 

Cory Cooper

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OK, thanks.

The only thing I see is the part at the top that references AppleAHCIDiskQueueManager. That manages power management of internal/external drives.

-Do you have any external drives connected?
-If so, have you tried running the iMac with nothing connected at all except the keyboard and mouse?
-Have you tried a safe boot?

C
 
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The only external drive is the "my passport" drive that I use for Time Machine. I have booted up now in safe mode and All that is attached is an apple bluetooth keyboard and mouse.After about 15 minutes it restarted itself with the same panic kernel. I am now getting a message on start up that the drive that I attached (I haven't attached anything ) cannot be read by this computer. Options are Ignore, Eject, Initialize. Tried all three options, did not make any difference. Checked the drives with Disk Utility. There is one internal drive ST2000DM001 media that says 14.4 GB and underneath the name it says uninitialized. I have never seen that one in the past. It also says not detachable.
 
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Cory Cooper

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OK, thanks.

If the drive gives you that error, then it may be that the hard drive is failing. That would cause the kernel panic for sure. That drive is a Seagate Desktop HDD ST2000DM001 2 TB (Apple OEM version).

You could try installing macOS on another external if you have one and run the iMac from it. If you don't get the kernel panic, then it's probably the drive. If you do, it may be the logic board.

C
 

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