Need More Help, Please! Panic Report / Crashes - What does it mean & What do I do?

[baffld]

Hi - Just had a rerun of the previous problem (crashes, gives panic report) tho with a different message now.

My 27" iMac from late 2015 (a refurb I bought early 2017, so AppleCare expired a month ago) suddenly locked up and restarted - this time while I was trying to place an order. Still on Mojave because of 32-bit apps. Is it obvious what the problem is here? What should I be doing about it? I'm not too techie. Thanks AGAIN for any help or direction!

Here's the new report:
Anonymous UUID: 037AB713-8370-D881-4B35-26D5B521A661

Sun Apr 5 22:15:08 2020

*** Panic Report ***
panic(cpu 1 caller 0xffffff800d005446): "a freed zone element has been modified in zone kalloc.128: expected 0xdeadbeefdeadbeef but found 0xffffff802f937fd0, bits changed 0x2152416ff13ec13f, at offset 88 of 128 in element 0xffffff802498e500, cookies 0x3f00115529d5705a 0x53521c55346c211"@/BuildRoot/Library/Caches/com.apple.xbs/Sources/xnu/xnu-4903.278.28/osfmk/kern/zalloc.c:1206
Backtrace (CPU 1), Frame : Return Address
0xffffff912473b1e0 : 0xffffff800cfaf58d
0xffffff912473b230 : 0xffffff800d0eb145
0xffffff912473b270 : 0xffffff800d0dc87a
0xffffff912473b2e0 : 0xffffff800cf5c9d0
0xffffff912473b300 : 0xffffff800cfaefa7
0xffffff912473b420 : 0xffffff800cfaedf3
0xffffff912473b490 : 0xffffff800d005446
0xffffff912473b5e0 : 0xffffff800cfbba54
0xffffff912473b650 : 0xffffff800d5c9777
0xffffff912473b680 : 0xffffff7f902772f9
0xffffff912473b6c0 : 0xffffff7f8f234005
0xffffff912473b960 : 0xffffff7f8f235027
0xffffff912473b9f0 : 0xffffff7f8f23335e
0xffffff912473ba50 : 0xffffff7f8f233165
0xffffff912473baa0 : 0xffffff7f8f2321bb
0xffffff912473bae0 : 0xffffff800d684e88
0xffffff912473bb30 : 0xffffff800d68e322
0xffffff912473bc70 : 0xffffff800d097596
0xffffff912473bd80 : 0xffffff800cfb4dcc
0xffffff912473bdd0 : 0xffffff800cf8fb41
0xffffff912473be50 : 0xffffff800cfa425e
0xffffff912473bef0 : 0xffffff800d0c27b7
0xffffff912473bfa0 : 0xffffff800cf5d1b6
Kernel Extensions in backtrace:
com.apple.iokit.IOAcceleratorFamily2(404.14)[A89211C3-203C-3F08-AF43-47E5179B166A]@0xffffff7f8f1fb000->0xffffff7f8f2a1fff
dependency: com.apple.driver.AppleMobileFileIntegrity(1.0.5)[2C186818-6D29-3A4B-BC2D-A810FC514FEA]@0xffffff7f8e051000
dependency: com.apple.iokit.IOSurface(255.6.1)[51C0A6EC-149C-3ECE-92E5-ACF817AE1699]@0xffffff7f8f1d7000
dependency: com.apple.iokit.IOPCIFamily(2.9)[F9449D20-0DF4-3A92-9532-7E6917DFF1A6]@0xffffff7f8d895000
dependency: com.apple.iokit.IOGraphicsFamily(530.68)[3108B928-3E0F-34FF-B9C8-F345592F4B27]@0xffffff7f8e197000
dependency: com.apple.iokit.IOReportFamily(47)[F9CF3B44-D9FA-3470-ABA5-79877BD0B46C]@0xffffff7f8e567000
com.apple.kext.AMDRadeonX4000(2.1.1)[3E6061BB-3ED6-370F-81A5-D5EA2D14C2D3]@0xffffff7f90230000->0xffffff7f9066ffff
dependency: com.apple.iokit.IOSurface(255.6.1)[51C0A6EC-149C-3ECE-92E5-ACF817AE1699]@0xffffff7f8f1d7000
dependency: com.apple.iokit.IOPCIFamily(2.9)[F9449D20-0DF4-3A92-9532-7E6917DFF1A6]@0xffffff7f8d895000
dependency: com.apple.iokit.IOGraphicsFamily(530.68)[3108B928-3E0F-34FF-B9C8-F345592F4B27]@0xffffff7f8e197000
dependency: com.apple.iokit.IOAcceleratorFamily2(404.14)[A89211C3-203C-3F08-AF43-47E5179B166A]@0xffffff7f8f1fb000

BSD process name corresponding to current thread: WindowServer

Mac OS version:
18G4032

Kernel version:
Darwin Kernel Version 18.7.0: Mon Feb 10 21:08:45 PST 2020; root:xnu-4903.278.28~1/RELEASE_X86_64
Kernel UUID: A52CF11D-A733-3E77-832B-D42063739C84
Kernel slide: 0x000000000cc00000
Kernel text base: 0xffffff800ce00000
__HIB text base: 0xffffff800cd00000
System model name: iMac17,1 (Mac-DB15BD556843C820)

System uptime in nanoseconds: 40020515950011
last loaded kext at 35115080750662: com.apple.driver.AppleUSBAudio 315.6 (addr 0xffffff7f918d6000, size 413696)
last unloaded kext at 39518636907200: com.apple.driver.usb.cdc 5.0.0 (addr 0xffffff7f918c4000, size 28672)
loaded kexts:
com.paloaltonetworks.kext.pangpd 5.0.5f28
com.paragon-software.filesystems.ntfs 288.2.14
com.symantec.ips.kext 10.0.0
com.symantec.nfm.kext 10.0.0
com.symantec.internetSecurity.kext 10.0.0
com.symantec.SymXIPS 9.0.1
com.apple.driver.AppleTopCaseHIDEventDriver 138.4
com.apple.fileutil 20.036.15
com.apple.driver.AudioAUUC 1.70
com.apple.driver.AGPM 110.25.11
com.apple.driver.ApplePlatformEnabler 2.7.0d0
com.apple.driver.X86PlatformShim 1.0.0
com.apple.filesystems.autofs 3.0
com.apple.driver.AppleMikeyHIDDriver 131
com.apple.driver.AppleMikeyDriver 282.54
com.apple.driver.AppleUpstreamUserClient 3.6.5
com.apple.kext.AMDFramebuffer 2.1.1
com.apple.kext.AMDRadeonX4000 2.1.1
com.apple.driver.AppleHDA 282.54
com.apple.driver.AppleGraphicsDevicePolicy 3.50.15
com.apple.AGDCPluginDisplayMetrics 3.50.15
com.apple.driver.AppleHV 1
com.apple.iokit.IOUserEthernet 1.0.1
com.apple.iokit.IOBluetoothSerialManager 6.0.14d6
com.apple.driver.pmtelemetry 1
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.driver.AppleIntelSKLGraphics 12.1.0
com.apple.driver.AppleMCCSControl 1.5.9
com.apple.driver.AppleIntelPCHPMC 2.0.1
com.apple.driver.eficheck 1
com.apple.iokit.BroadcomBluetooth20703USBTransport 6.0.14d6
com.apple.driver.AppleOSXWatchdog 1
com.apple.driver.AppleSMCLMU 212
com.apple.driver.AppleIntelSlowAdaptiveClocking 4.0.0
com.apple.driver.AppleThunderboltIP 3.1.2
com.apple.driver.AppleIntelSKLGraphicsFramebuffer 12.1.0
com.apple.kext.AMD7000Controller 2.1.1
com.apple.driver.AppleVirtIO 2.1.3
com.apple.filesystems.hfs.kext 407.200.4
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1
com.apple.BootCache 40
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0
com.apple.AppleSystemPolicy 1.0
com.apple.driver.AppleSDXC 1.7.6
com.apple.iokit.AppleBCM5701Ethernet 10.3.3
com.apple.driver.AirPort.BrcmNIC 1400.1.1
com.apple.filesystems.apfs 945.275.8
com.apple.private.KextAudit 1.0
com.apple.driver.AppleAHCIPort 329.260.5
com.apple.driver.AppleRTC 2.0
com.apple.driver.AppleACPIButtons 6.1
com.apple.driver.AppleHPET 1.8
com.apple.driver.AppleSMBIOS 2.1
com.apple.driver.AppleACPIEC 6.1
com.apple.driver.AppleAPIC 1.7
com.apple.nke.applicationfirewall 202
com.apple.security.TMSafetyNet 8
com.apple.driver.AppleHIDKeyboard 208
com.apple.driver.AppleMultitouchDriver 2450.1
com.apple.driver.AppleInputDeviceSupport 2440.4
com.apple.driver.AppleHSBluetoothDriver 138.4
com.apple.driver.IOBluetoothHIDDriver 6.0.14d6
com.apple.kext.triggers 1.0
com.apple.kext.AMDRadeonX4030HWLibs 1.0
com.apple.kext.AMDRadeonX4000HWServices 2.1.1
com.apple.driver.DspFuncLib 282.54
com.apple.kext.OSvKernDSPLib 528
com.apple.driver.AppleGraphicsControl 3.50.15
com.apple.iokit.IOAVBFamily 760.6
com.apple.plugin.IOgPTPPlugin 740.2
com.apple.iokit.IOSkywalkFamily 1
com.apple.driver.AppleSSE 1.0
com.apple.driver.AppleSMBusController 1.0.18d1
com.apple.AppleGPUWrangler 3.50.15
com.apple.iokit.IONDRVSupport 530.51
com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 6.0.14d6
com.apple.iokit.IOBluetoothHostControllerUSBTransport 6.0.14d6
com.apple.iokit.IOBluetoothHostControllerTransport 6.0.14d6
com.apple.iokit.IOBluetoothFamily 6.0.14d6
com.apple.driver.AppleSMBusPCI 1.0.14d1
com.apple.driver.X86PlatformPlugin 1.0.0
com.apple.driver.IOPlatformPluginFamily 6.0.0d8
com.apple.iokit.IOSlowAdaptiveClockingFamily 1.0.0
com.apple.driver.AppleThunderboltEDMSink 4.2.0
com.apple.iokit.IOAcceleratorFamily2 404.14
com.apple.iokit.IOSurface 255.6.1
com.apple.kext.AMDSupport 2.1.1
com.apple.AppleGraphicsDeviceControl 3.50.15
com.apple.driver.AppleHDAController 282.54
com.apple.iokit.IOGraphicsFamily 530.68
com.apple.iokit.IOHDAFamily 282.54
com.apple.iokit.IOAudioFamily 206.5
com.apple.vecLib.kext 1.2.0
com.apple.driver.usb.AppleUSBHub 1.2
com.apple.driver.usb.networking 5.0.0
com.apple.driver.usb.AppleUSBHostCompositeDevice 1.2
com.apple.iokit.IOSerialFamily 11
com.apple.filesystems.hfs.encodings.kext 1
com.apple.driver.AppleThunderboltDPInAdapter 5.6.9
com.apple.driver.AppleThunderboltDPOutAdapter 5.6.9
com.apple.driver.AppleThunderboltDPAdapterFamily 5.6.9
com.apple.driver.AppleThunderboltPCIDownAdapter 2.1.5
com.apple.driver.AppleThunderboltNHI 4.7.9
com.apple.iokit.IOThunderboltFamily 6.8.7
com.apple.iokit.IONVMeFamily 2.1.0
com.apple.iokit.IOEthernetAVBController 1.1.0
com.apple.iokit.IO80211Family 1200.12.2
com.apple.driver.mDNSOffloadUserClient 1.0.1b8
com.apple.driver.corecapture 1.0.4
com.apple.iokit.IOAHCIBlockStorage 301.270.1
com.apple.driver.AppleUSBMergeNub 900.4.2
com.apple.driver.AppleUSBHostMergeProperties 1.2
com.apple.driver.usb.AppleUSBHostPacketFilter 1.0
com.apple.iokit.IOUSBFamily 900.4.2
com.apple.iokit.IOAHCIFamily 288
com.apple.driver.usb.AppleUSBXHCIPCI 1.2
com.apple.driver.usb.AppleUSBXHCI 1.2
com.apple.driver.AppleEFINVRAM 2.1
com.apple.driver.AppleEFIRuntime 2.1
com.apple.iokit.IOSMBusFamily 1.1
com.apple.iokit.IOHIDFamily 2.0.0
com.apple.security.quarantine 3
com.apple.security.sandbox 300.0
com.apple.kext.AppleMatch 1.0.0d1
com.apple.driver.DiskImages 493.0.0
com.apple.driver.AppleFDEKeyStore 28.30
com.apple.driver.AppleEffaceableStorage 1.0
com.apple.driver.AppleKeyStore 2
com.apple.driver.AppleUSBTDM 456.260.3
com.apple.driver.AppleMobileFileIntegrity 1.0.5
com.apple.iokit.IOUSBMassStorageDriver 145.200.2
com.apple.iokit.IOSCSIBlockCommandsDevice 408.250.3
com.apple.iokit.IOSCSIArchitectureModelFamily 408.250.3
com.apple.iokit.IOStorageFamily 2.1
com.apple.kext.CoreTrust 1
com.apple.driver.AppleCredentialManager 1.0
com.apple.driver.KernelRelayHost 1
com.apple.iokit.IOUSBHostFamily 1.2
com.apple.driver.usb.AppleUSBCommon 1.0
com.apple.driver.AppleBusPowerController 1.0
com.apple.driver.AppleSEPManager 1.0.1
com.apple.driver.IOSlaveProcessor 1
com.apple.iokit.IOReportFamily 47
com.apple.iokit.IOTimeSyncFamily 740.2
com.apple.iokit.IONetworkingFamily 3.4
com.apple.driver.AppleACPIPlatform 6.1
com.apple.driver.AppleSMC 3.1.9
com.apple.iokit.IOPCIFamily 2.9
com.apple.iokit.IOACPIFamily 1.4
com.apple.kec.pthread 1
com.apple.kec.Libm 1
com.apple.kec.corecrypto 1.0

EOF
Model: iMac17,1, BootROM 176.0.0.0.0, 4 processors, Intel Core i5, 3.2 GHz, 8 GB, SMC 2.33f10
Graphics: kHW_AMDRadeonR9M390Item, AMD Radeon R9 M390, spdisplays_pcie_device, 2 GB
Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1867 MHz, 0x802C, 0x384B54463531323634485A2D314739503220
Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1867 MHz, 0x802C, 0x384B54463531323634485A2D314739503220
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x14A), Broadcom BCM43xx 1.0 (7.77.61.3 AirPortDriverBrcmNIC-1305.9)
Bluetooth: Version 6.0.14d6, 3 services, 27 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Serial ATA Device: APPLE HDD ST1000DM003, 1 TB
USB Device: USB 3.0 Bus
USB Device: Backup+ Hub
USB Device: Backup+ Hub BK
USB Device: Bluetooth USB Host Controller
USB Device: FaceTime HD Camera (Built-in)
USB Device: Backup+ Hub
Thunderbolt Bus: iMac, Apple Inc., 28.1

 

[Rodan52]

Well in my experience if you were to ring Apple Support they would tell you to back up via say Time Machine and reinstall your Operating System. This is just a cheap fix solution when the consultant has no idea where to start with the problem and assumes it is software related. Sometimes it works.
What have you tried to do to fix this?
Have you run Disk Utility First Aid on the HD?

From a mechanical point of view there are 3 reasons an iMac might shut down and reboot for no apparent reason. Power surges on the circuit you are using, overheating or a failing power supply.

If you dont think its any of these then I would suggest a full backup if possible then try reinstalling the OS from the Recovery Partition.

 

[baffld]

Hi - Thank you for your advice! I posted in this subform on Saturday at 8:48 PM when this was happening but with a different report.

Someone then recommended I go to Terminal and "Try to rebuild the kext cache with Code: sudo kextcache -I / in " which I did. It seemed fine until this evening when it shut down again, and so I posted the above report.

I do have the computer plugged into a power surge protector. I don't know how I'd tell about the other two possibilities?

I will run Disk Utility First Aid right now - and hopefully can report back good news! Thank you!

 

[allpar]

Mojave brought me a crash-on-sleep issue (a lot of people got it at the same time) - is sleep involved at all? It might only be affecting Mini 8s.

 

[baffld]

Thanks! It did crash one more time that I've seen after doing the above steps. It probably happened sometimes during the sleep mode, but it's also happened right while I was typing. It's baffling! I unplugged my 32-bit Dymo Labelwriter 400 Turbo but the app is still there - apparently no 64-bit version available. So if I upgrade, it's unusable, AFAIK. So, guess I'll see what happens over the next few days.

 

[allpar]

One label writer isn't so bad compared to the entire Adobe Creative Suite and Microsoft Office!

LaunchControl is an excellent utility for shutting off various startup programs that might be the problem. I think I used MacPilot to find extensions, but all sorts of utilities find them for you, then you may have to remove or move them using Terminal.

I _believe_ I found the problem — one particular MacAlly iKey keyboard, iMac-style (clear case) - it's obviously old. It took me forever to get to that point, especially because Apple says to leave the mouse and keyboard in while testing. Having a spare keyboard helps. I can't type on Apple keyboards, the keys don't move enough - my first typewriter was a 1956 Royal HH (HHE, but E just means Elite—small type).

Anyway, I might have solved the problem wiht a keyboard swap.