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macrumors newbie
Original poster
Jun 14, 2009
I've got a 3-week old 2019 27"iMac & I keep getting kernel panics with reboots several times/day. Looking for help & suggestions in diagnosing.

Details: Running Mojave 10.14.6. 3.7 GHz i5. the latest I've got 40 GB RAM (16 GB [OWC] x 2 & 4 GB [OEM] x 2). Also connected: 1) Samsung 28" monitor via T'Bolt 3, 2) CalDigit TS3+ hub, 3) OWC external docking station (connected to CalDigit hub). I've run hardware diagnostics with no issues detected. I've run disk utility with no issues detected. Here's the latest log in case someone can sift something useful from it...

Thanks in advance!

Anonymous UUID: B316985B-5528-1F14-6030-C619DDF23E53

Mon Sep 9 13:30:46 2019

*** Panic Report ***
mp_kdp_enter() timed-out on cpu 2, NMI-ing
mp_kdp_enter() NMI pending on cpus: 0 1 4
mp_kdp_enter() timed-out during locked wait after NMI;expected 6 acks but received 3 after 10338602 loops in 1848000000 ticks
panic(cpu 2 caller 0xffffff800fedbadd): Kernel trap at 0xffffff800fdd5d10, type 14=page fault, registers:
CR0: 0x0000000080010033, CR2: 0xffffff800a1ceb58, CR3: 0x00000001ddd3d04d, CR4: 0x00000000003626e0
RAX: 0x0000000000000001, RBX: 0xffffff8077bd9a40, RCX: 0x0000000000000000, RDX: 0x0000000000000000
RSP: 0xffffff849db53d70, RBP: 0xffffff849db53d70, RSI: 0xffffff800a1ce700, RDI: 0xffffff8077bd9a40
R8: 0x000000006e263e00, R9: 0x0000000000000000, R10: 0x00000000003a4a00, R11: 0x0000000000000000
R12: 0xffffff809e9ad128, R13: 0xffffff809e9ad000, R14: 0xffffff8077bd9a88, R15: 0xffffff80a41ce740
RFL: 0x0000000000010046, RIP: 0xffffff800fdd5d10, CS: 0x0000000000000008, SS: 0x0000000000000010
Fault CR2: 0xffffff800a1ceb58, Error code: 0x0000000000000000, Fault CPU: 0x2, PL: 2, VF: 5

Backtrace (CPU 2), Frame : Return Address
0xffffff849db53840 : 0xffffff800fdae6ed
0xffffff849db53890 : 0xffffff800feea185
0xffffff849db538d0 : 0xffffff800fedb8ba
0xffffff849db53940 : 0xffffff800fd5bb40
0xffffff849db53960 : 0xffffff800fdae107
0xffffff849db53a80 : 0xffffff800fdadf53
0xffffff849db53af0 : 0xffffff800fedbadd
0xffffff849db53c60 : 0xffffff800fd5bb40
0xffffff849db53c80 : 0xffffff800fdd5d10
0xffffff849db53d70 : 0xffffff800fdd60b2
0xffffff849db53dc0 : 0xffffff800fde2568
0xffffff849db53df0 : 0xffffff800fdabad0
0xffffff849db53e30 : 0xffffff800fde2512
0xffffff849db53e60 : 0xffffff800fde1f6d
0xffffff849db53ea0 : 0xffffff80102cef31
0xffffff849db53f40 : 0xffffff80103ba5ed
0xffffff849db53fa0 : 0xffffff800fd5c306

BSD process name corresponding to current thread: launchservicesd

Mac OS version:

Kernel version:
Darwin Kernel Version 18.7.0: Tue Aug 20 16:57:14 PDT 2019; root:xnu-4903.271.2~2/RELEASE_X86_64
Kernel UUID: C41337A1-0EC3-3896-A954-A1F85E849D53
Kernel slide: 0x000000000fa00000
Kernel text base: 0xffffff800fc00000
__HIB text base: 0xffffff800fb00000
System model name: iMac19,1 (Mac-AA95B1DDAB278B95)

System uptime in nanoseconds: 97213213433791
last loaded kext at 16775966541579: com.apple.filesystems.smbfs 3.3.2 (addr 0xffffff7f9204e000, size 442368)
loaded kexts:
com.intego.virusbarrier.kext.realtime 1574
com.intego.ContentBarrier.extension 3161
com.intego.netbarrier.kext.process 467
com.intego.netbarrier.kext.network 467
com.intego.netbarrier.kext.monitor 467
com.intego.ContentBarrier.safe-boot 3161
com.CalDigit.ThunderboltStationChargingSupport 1.1
com.apple.filesystems.smbfs 3.3.2
com.apple.filesystems.afpfs 11.1
com.apple.nke.asp-tcp 8.0.2
com.apple.filesystems.msdosfs 1.10
com.apple.driver.AppleTopCaseHIDEventDriver 138.4
com.apple.fileutil 20.036.15
com.apple.filesystems.autofs 3.0
com.apple.driver.AGPM 110.25.11
com.apple.driver.ApplePlatformEnabler 2.7.0d0
com.apple.driver.X86PlatformShim 1.0.0
com.apple.driver.AppleHDAHardwareConfigDriver 282.54
com.apple.driver.AppleHDA 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.AppleGraphicsDevicePolicy 3.50.12
com.apple.AGDCPluginDisplayMetrics 3.50.12
com.apple.driver.AppleHV 1
com.apple.iokit.IOUserEthernet 1.0.1
com.apple.driver.AGDCBacklightControl 3.50.12
com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0
com.apple.driver.AppleBacklight 170.12.12
com.apple.driver.AppleIntelKBLGraphics 12.1.0
com.apple.iokit.IOBluetoothSerialManager 6.0.14d3
com.apple.driver.pmtelemetry 1
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.driver.AppleMCCSControl 1.5.9
com.apple.kext.AMD9500Controller 2.1.1
com.apple.driver.AppleGFXHDA 100.1.414
com.apple.driver.AppleFIVRDriver 4.1.0
com.apple.driver.AppleIntelSlowAdaptiveClocking 4.0.0
com.apple.driver.AppleIntelCFLGraphicsFramebuffer 12.1.0
com.apple.driver.AppleOSXWatchdog 1
com.apple.driver.AppleIntelPCHPMC 2.0.1
com.apple.driver.AppleSMCLMU 212
com.apple.driver.AudioAUUC 1.70
com.apple.driver.eficheck 1
com.apple.driver.AppleThunderboltIP 3.1.2
com.apple.driver.usb.AppleUSBHostBillboardDevice 1.0
com.apple.iokit.SCSITaskUserClient 408.250.3
com.apple.driver.BCMWLANFirmware4364.Hashstore 1
com.apple.driver.BCMWLANFirmware4377.Hashstore 1
com.apple.driver.BCMWLANFirmware4355.Hashstore 1
com.apple.driver.AppleBCMWLANCoreV3.Datastore 1
com.apple.driver.AppleFileSystemDriver 3.0.1
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.AppleIntelI210Ethernet 2.3.0
com.apple.driver.AppleSDXC 1.7.6
com.apple.iokit.AppleBCM5701Ethernet 10.3.3
com.apple.driver.AppleBCMWLANBusInterfacePCIe 1
com.apple.filesystems.apfs 945.275.7
com.apple.driver.AppleAHCIPort 329.260.5
com.apple.private.KextAudit 1.0
com.apple.driver.AppleACPIButtons 6.1
com.apple.driver.AppleRTC 2.0
com.apple.driver.AppleSMBIOS 2.1
com.apple.driver.AppleACPIEC 6.1
com.apple.driver.AppleAPIC 1.7
com.apple.nke.applicationfirewall 201
com.apple.security.TMSafetyNet 8
com.apple.security.SecureRemotePassword 1.0
com.apple.driver.AppleHIDKeyboard 208
com.apple.driver.AppleMultitouchDriver 2450.1
com.apple.driver.AppleInputDeviceSupport 2440.2
com.apple.driver.AppleHSBluetoothDriver 138.4
com.apple.driver.IOBluetoothHIDDriver 6.0.14d3
com.apple.kext.triggers 1.0
com.apple.driver.DspFuncLib 282.54
com.apple.kext.OSvKernDSPLib 528
com.apple.kext.AMDRadeonX4400HWLibs 1.0
com.apple.kext.AMDRadeonX4000HWServices 2.1.1
com.apple.driver.AppleGraphicsControl 3.50.12
com.apple.iokit.IOAVBFamily 760.6
com.apple.plugin.IOgPTPPlugin 740.2
com.apple.driver.AppleSSE 1.0
com.apple.driver.IOPlatformPluginLegacy 1.0.0
com.apple.driver.AppleBacklightExpert 1.1.0
com.apple.driver.AppleHDAController 282.54
com.apple.iokit.IOHDAFamily 282.54
com.apple.driver.X86PlatformPlugin 1.0.0
com.apple.driver.AppleSMBusController 1.0.18d1
com.apple.iokit.IOBluetoothHostControllerUARTTransport 6.0.14d3
com.apple.iokit.IOBluetoothHostControllerTransport 6.0.14d3
com.apple.iokit.IOBluetoothFamily 6.0.14d3
com.apple.iokit.IONDRVSupport 530.51
com.apple.driver.AppleSMBusPCI 1.0.14d1
com.apple.AppleGPUWrangler 3.50.12
com.apple.iokit.IOSlowAdaptiveClockingFamily 1.0.0
com.apple.iokit.IOAcceleratorFamily2 404.14
com.apple.iokit.IOSurface 255.6.1
com.apple.driver.IOPlatformPluginFamily 6.0.0d8
com.apple.driver.AppleIntelLpssUARTv1 3.0.60
com.apple.driver.AppleIntelLpssUARTCommon 3.0.60
com.apple.driver.AppleOnboardSerial 1.0
com.apple.iokit.IOSkywalkFamily 1
com.apple.kext.AMDSupport 2.1.1
com.apple.AppleGraphicsDeviceControl 3.50.12
com.apple.iokit.IOGraphicsFamily 530.66
com.apple.driver.AppleThunderboltEDMSink 4.2.0
com.apple.driver.AppleThunderboltDPInAdapter 5.6.9
com.apple.driver.AppleThunderboltDPOutAdapter 5.6.9
com.apple.driver.AppleThunderboltDPAdapterFamily 5.6.9
com.apple.driver.AppleThunderboltPCIUpAdapter 2.1.5
com.apple.driver.AppleThunderboltPCIDownAdapter 2.1.5
com.apple.driver.AppleHPM 3.4.1
com.apple.driver.AppleIntelLpssI2CController 3.0.60
com.apple.driver.AppleIntelLpssDmac 3.0.60
com.apple.driver.AppleIntelLpssI2C 3.0.60
com.apple.driver.AppleUSBAudio 315.6
com.apple.driver.usb.IOUSBHostHIDDevice 1.2
com.apple.iokit.IOAudioFamily 206.5
com.apple.vecLib.kext 1.2.0
com.apple.driver.AppleUSBHostMergeProperties 1.2
com.apple.driver.usb.cdc 5.0.0
com.apple.driver.usb.networking 5.0.0
com.apple.driver.usb.AppleUSBHostCompositeDevice 1.2
com.apple.driver.usb.AppleUSBHub 1.2
com.apple.filesystems.hfs.encodings.kext 1
com.apple.driver.AppleThunderboltNHI 4.7.9
com.apple.iokit.IOThunderboltFamily 6.8.6
com.apple.iokit.IOEthernetAVBController 1.1.0
com.apple.driver.AppleBCMWLANCore 1.0.0
com.apple.driver.mDNSOffloadUserClient 1.0.1b8
com.apple.driver.IOImageLoader 1.0.0
com.apple.iokit.IOSerialFamily 11
com.apple.iokit.IO80211FamilyV2 1200.12.2
com.apple.driver.corecapture 1.0.4
com.apple.driver.AppleXsanScheme 3
com.apple.iokit.IOAHCIBlockStorage 301.270.1
com.apple.iokit.IONVMeFamily 2.1.0
com.apple.iokit.IOAHCIFamily 288
com.apple.driver.usb.AppleUSBXHCIPCI 1.2
com.apple.driver.usb.AppleUSBXHCI 1.2
com.apple.driver.usb.AppleUSBHostPacketFilter 1.0
com.apple.iokit.IOUSBFamily 900.4.2
com.apple.driver.AppleEFINVRAM 2.1
com.apple.driver.AppleEFIRuntime 2.1
com.apple.driver.AppleSMCRTC 1.0
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



macrumors newbie
Sep 9, 2019
I've run into something that looks similar. The block after the Panic report talks about lockouts after NMI and it happens randomly multiple times a day. Mine is on a 2015 iMac also on Mojave.

I have done the following:
  1. Reset NVRAM
  2. Run Apple Hardware Test (no failures)
  3. Run memtest86, 8 passes, no failures
  4. Deleted and reinstalled Mojave
The problem persists for me.


macrumors demi-god
May 19, 2019
I've got 40 GB RAM (16 GB [OWC] x 2 & 4 GB [OEM] x 2)

Have you tried running the machine with just the original RAM?


macrumors newbie
Original poster
Jun 14, 2009
Have you tried running the machine with just the original RAM?

Thanks for the recommendation. I’m going to try that next after I finish the Memtest86 run I’ve got going right now.


macrumors 604
Sep 6, 2002
Also, we're going to look at the extensions you've got running. The obvious standout is Intego VirusBarrier. Is this a company computer that your IT department installed this on? If not, you should consider ridding your system of all of the Intego parts and pieces. If not possible, you might have to start over with a clean install. Virus protection other than what Apple provides isn't needed, and if you think about it there is no reason to think that a third party can protect the system better than the engineers who built it.
  • Like
Reactions: chscag


Feb 17, 2008
Fort Worth, Texas
Several folks have gotten bad memory modules from OWC. Not saying that could be your problem, but the idea of running only the original memory from Apple and removing the virus protection as was recommended by @chabig, is what you should do first. Another thing you can do is run the machine without all the peripherals that you have attached.

Sam Marks

macrumors member
Jul 5, 2019
My 2019 27" iMac started crashing randomly after 10 days of use. No kernel panic info was shown after the random restarts. The restarts increased in frequency progressively and, in a questions of hours, the computer did not even restart again. I returned the dead machine and the seller is going to refund me. Veredict: manufacturing failure
Last edited:


macrumors newbie
Original poster
Jun 14, 2009
Several folks have gotten bad memory modules from OWC. Not saying that could be your problem, but the idea of running only the original memory from Apple and removing the virus protection as was recommended by @chabig, is what you should do first. Another thing you can do is run the machine without all the peripherals that you have attached.

I removed the CalDigit hub last night & I'm going on 18 hours with no kernel panics.
  • Like
Reactions: 28Gauge


macrumors newbie
Original poster
Jun 14, 2009
Update: I pulled the OEM RAM & left the OWC in the iMac. I also reconnected the CalDigit hub. I've now gone almost 3 weeks without any panics or reboots.
  • Like
Reactions: Sam Marks


macrumors newbie
Jan 28, 2016
I have a 2019 27" (Catalina 10.15.4, 3.7 GHz i5, 16 GB Apple-installed RAM, 2 TB Fusion drive) that has had kernel panic problems for the last several months. In January, (since the 1-year warranty period was ending in March), I took it to my local Apple store. Their first recommendation was to completely wipe the hard disk and reinstall everything. They reinstalled Catalina (10.15.2 at the time), then I came home and reinstalled everything non-system related from my Time Machine backup, then re-partitioned and reinstalled Boot Camp & Windows 10.

I updated to 10.15.3, after which they started again. I took it back in, and they kept it to run whatever tests they have available, thinking they were going to wind up replacing a logic board and/or power supply. They could not get it to fail, so I picked it up on 3/1.

All was well for a couple of weeks, then they started again, and are continuing since upgrading to 10.15.4 on 3/28.

After reading this thread, I just removed some vestigial (2014-ish) Intego software. I can't see doing the rest of what's been recommended, since my crashes appear to be completely random. Sometimes weeks between, sometimes a day or less.

I never do anything that remotely stresses the machine capability such as video editing; my typical uses are email, MS Office, Safari, calendar, messages, etc.


macrumors newbie
Jan 28, 2016
So far, so good. It's been over two months now. I don't understand how removing inactive software could fix my problem, but it appears that it has. Thanks, nambuccaheadsau.


macrumors 604
Sep 6, 2002
I’m glad that solved your problem. Intego is a “security” software that purports to protect your Mac. But think about it. Who knows the system better, the engineers at Apple who built it, or any of a number of third party A/V sellers? Security software has to mess with the lowest levels of the system to be effective, so it’s more likely to compromise the system than help it.

Your Intego software wasn’t inactive. It six several system extensions! Since you thought it was inactive, it might not have been kept up to date, it might have been buggy itself, and it certainly exhibited incompatibilities with Mojave.
Last edited:


macrumors newbie
Jan 28, 2016
Over the ensuing almost three months, I've had a very few suspicious restarts, but it had not crashed while I was using it. Then two days ago, I had four restarts in less than 24 hours - the last one was a definite crash while I was using it.

I called Apple support, and the lady had me reset SMC and NVRAM. For good measure, I also removed all my Norton security software, as it was the only thing I had that had any sort of low-level system access.

Hoping I don't have to take it in again since all our local Apple stores are closed due to COVID.
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