I have performed memtests that result in no failures, as well as tested the health of the 1TB SSD in this machine. I have pulled the RAM and placed new RAM. I have reset NVRAM. I have completely wiped and installed Big Sur fresh. I am still getting intermittent and seemingly random kernel panics.

Even when reinstalling again, back to Sierra, I'm actually getting panics after a fresh install, before the setup is complete. It typically shows the following:

 Kernel Extensions in backtrace:


    dependency: com.apple.driver.mDNSOffloadUserClient(1.0.1b8)[D4B89780-21D2-3499-8CC1-E92275BA0604]@0xffffff8013766000->0xffffff801376afff
    dependency: com.apple.iokit.IOACPIFamily(1.4)[59A305C2-E322-3EA6-B8DB-475512053CDE]@0xffffff8013244000->0xffffff8013245fff
    dependency: com.apple.iokit.IONetworkingFamily(3.4)[85A525E4-C60E-345C-B651-6266952AFCA5]@0xffffff80134e0000->0xffffff80134f6fff
    dependency: com.apple.iokit.IOPCIFamily(2.9)[4E85D41F-6AD7-3C24-911C-A8B80B599F86]@0xffffff801376c000->0xffffff8013794fff
    dependency: com.apple.iokit.IOTimeSyncFamily(985.2)[65E1B8DA-D7E4-3F0E-8108-440507F8C0F7]@0xffffff80139ba000->0xffffff80139d5fff
  • Why do you think it's network-related?
    – nohillside
    Oct 22, 2021 at 15:03
  • I do not think it's network related. I am only showing the relevant output of Kernel Extensions in backtrace. It is the same output every time.
    – Kahn
    Oct 22, 2021 at 15:08
  • Assuming you are using Ethernet, did you try to change the LAN cable?
    – nohillside
    Oct 22, 2021 at 15:21
  • I did use a different cable, yup. It may have just been a conicidence, but when I unplugged the cable from the machine, it kernel panicked again. Just as a test, I've decided to keep it unplugged and have no networking on it at all to see if it panics again. I've also noticed that every time this happens I've been using a Cat 6 cable, not like that would mean much, but I'm curious to try it with a Cat 5 cable next. I recognize how silly that sounds.
    – Kahn
    Oct 22, 2021 at 15:57
  • I had no crashes staying off the internet, then decided to reconnect using different cables as well as trying Ethernet to Thunderbolt adapters, which started the crashes again. What would cause that?
    – Kahn
    Oct 22, 2021 at 18:15

1 Answer 1


This issue has been resolved after updating to Monterey. I have absolutely no idea what ultimately the problem was, but I haven't had this issue since updating last week:

kriss-iMac:Downloads kris$ uptime
 8:32  up 6 days, 23:01, 3 users, load averages: 1.71 2.16 1.93

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