Tried downloading latest version, and when opening, it immediately crashes a fresh install of Mac OS Big Sur 11.0.1
To clarify, its not just a crash of the Plex Media Server, launching the app crashes the computer itself. Immediately goes to black screen, kernel panic, restart.
I am having exactly the same problem! I absolutely cannot launch Plex Media Server after updating to Big Sur. I had to boot into safe mode, remove it from my login items and restart.
Woah! I’m NOT seeing this. I used a few of the Big Sur betas and had Plex working fine in them, too.
Even if Plex is doing something very wrong, the OS shouldn’t crash. Wow. What computer? I wonder if it’s related to probing for acceleration hardware.
Does Plex log anything useful when this happens? Can you share them?
https://support.plex.tv/articles/200250417-plex-media-server-log-files/
You can download my logs here.
I checked the crash log and theres nothing in there.
I’m using a late 2014 iMac i7.
BigSur and 2015 iMac and I was crashing at start up until I disabled all Plex. Tried re-downloading and it still crashes.
All very interesting, I have just install MacOS 11.01. Plex works fine, the computer is not crashing at all. It’s quick and I’m mostly happy.
iMac (Retina 5K, 27-inch, 2020) 6-Core Intel Core i5
These are the only issues found from install the MacOS update.
Tautulli will not open from Bookmark. I had to relaunch from applications and Allow access from a MacOS popup. So all Good now.
PIA Split Tunneling is not supported at this point with MacOS 11
I would suggest the issues being experienced are Browser extensions or AV
I have the same issue too. I had to boot my Mac into safe mode to disable PMS launching on startup. However, as soon as I open Plex Media Server again manually, my system completely crashes seconds after and restarts. You can download my Plex logs here.
And here’s the crash report I get after my Mac restarts:
panic(cpu 0 caller 0xffffff801debfb71): assertion failed: (MBUFQ_EMPTY(&cfq->q_mq) && cfq->q_start == cfq->q_end) || (!MBUFQ_EMPTY(&cfq->q_mq) && cfq->q_start != cfq->q_end), file: /AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/xnu/xnu-7195.50.7/bsd/net/content_filter.c, line: 1089
Backtrace (CPU 0), Frame : Return Address
0xffffff803175b6f0 : 0xffffff801d6bc66d
0xffffff803175b740 : 0xffffff801d7ff073
0xffffff803175b780 : 0xffffff801d7ef6aa
0xffffff803175b7d0 : 0xffffff801d661a2f
0xffffff803175b7f0 : 0xffffff801d6bbf0d
0xffffff803175b910 : 0xffffff801d6bc1f8
0xffffff803175b980 : 0xffffff801debee1a
0xffffff803175b9f0 : 0xffffff801debfb71
0xffffff803175ba00 : 0xffffff801daadcfe
0xffffff803175ba40 : 0xffffff801daae008
0xffffff803175bbd0 : 0xffffff801daac4ef
0xffffff803175bc20 : 0xffffff801daa921c
0xffffff803175bc90 : 0xffffff801dc2ecf9
0xffffff803175bce0 : 0xffffff801dca8c20
0xffffff803175be00 : 0xffffff801dc7d4c8
0xffffff803175be30 : 0xffffff801dc77e35
0xffffff803175bee0 : 0xffffff801dc77c47
0xffffff803175bf40 : 0xffffff801dd69ceb
0xffffff803175bfa0 : 0xffffff801d6621f6
Process name corresponding to current thread: ch.tripmode.TripMode.FilterExten
Mac OS version:
20B29
Kernel version:
Darwin Kernel Version 20.1.0: Sat Oct 31 00:07:11 PDT 2020; root:xnu-7195.50.7~2/RELEASE_X86_64
Kernel UUID: 84C6DC45-6B02-335F-9439-5D2A9BC385A4
KernelCache slide: 0x000000001d400000
KernelCache base: 0xffffff801d600000
Kernel slide: 0x000000001d410000
Kernel text base: 0xffffff801d610000
__HIB text base: 0xffffff801d500000
System model name: MacBookPro11,1 (Mac-189A3D4F975D5FFC)
System shutdown begun: NO
Panic diags file available: YES (0x0)
Hibernation exit count: 0
System uptime in nanoseconds: 7200141557131
Last Sleep: absolute base_tsc base_nano
Uptime : 0x0000068c69e141b8
Sleep : 0x0000000000000000 0x0000000000000000 0x0000000000000000
Wake : 0x0000000000000000 0x00000009ef4b172b 0x0000000000000000
last started kext at 188347851126: @ filesystems.smbfs 3.4.1 (addr 0xffffff7fbdab5000, size 434176)
loaded kexts:
com.globaldelight.driver.Boom2Device 1.1
@ filesystems.smbfs 3.4.1
>!AUpstreamUserClient 3.6.8
@ filesystems.autofs 3.0
@ fileutil 20.036.15
>!APlatformEnabler 2.7.0d0
>AGPM 119
>X86PlatformShim 1.0.0
>AudioAUUC 1.70
>!AGraphicsDevicePolicy 6.1.27
@ AGDCPluginDisplayMetrics 6.1.27
>!AHDAHardwareConfigDriver 283.15
>!AHDA 283.15
>pmtelemetry 1
>LuaHardwareAccess 1.0.16
|IOUserEthernet 1.0.1
>usb.!UUserHCI 1
>!A!IHD5000Graphics 16.0.0
|IO!BSerialManager 8.0.1f5
@ Dont_Steal_Mac_OS_X 7.0.0
>!AHV 1
>!ADiskImages2 1
>eficheck 1
>AGDCBacklightControl 6.1.27
>!A!ISlowAdaptiveClocking 4.0.0
>!ACameraInterface 7.6.0
>!ALPC 3.1
>!AThunderboltIP 4.0.3
>!A!IFramebufferAzul 16.0.0
>!ABacklight 180.3
>!ASMCLMU 212
>ACPI_SMC_PlatformPlugin 1.0.0
>!AFIVRDriver 4.1.0
>!AMCCSControl 1.14
|IO!BUSBDFU 8.0.1f5
>!UTCKeyEventDriver 256
>!UTCButtons 256
>!UTCKeyboard 256
>!AFileSystemDriver 3.0.1
@ filesystems.tmpfs 1
@ filesystems.hfs.kext 556.41.1
@ BootCache 40
@ !AFSCompression.!AFSCompressionTypeZlib 1.0.0
@ !AFSCompression.!AFSCompressionTypeDataless 1.0.0d1
@ filesystems.apfs 1677.50.1
>!AAHCIPort 346
>AirPort.BrcmNIC 1400.1.1
@ private.KextAudit 1.0
>!ASmartBatteryManager 161.0.0
>!ARTC 2.0
>!AACPIButtons 6.1
>!AHPET 1.8
>!ASMBIOS 2.1
>!AACPIEC 6.1
>!AAPIC 1.7
@ !ASystemPolicy 2.0.0
@ nke.applicationfirewall 310
|IOKitRegistryCompatibility 1
|EndpointSecurity 1
@ kext.triggers 1.0
>!AGraphicsControl 6.1.27
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@ kext.OSvKernDSPLib 529
|IOSerial!F 11
|IOAVB!F 900.12
@ !AGPUWrangler 6.1.27
|IOSlowAdaptiveClocking!F 1.0.0
>!ASMBusPCI 1.0.14d1
>!AThunderboltEDMSink 5.0.3
>!AThunderboltDPOutAdapter 8.1.4
|IOAccelerator!F2 439.35.4
@ !AGraphicsDeviceControl 6.1.27
>!ABacklightExpert 1.1.0
|IONDRVSupport 585
@ plugin.IOgPTPPlugin 900.11
|IOEthernetAVB!C 1.1.0
>IOPlatformPluginLegacy 1.0.0
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>IOPlatformPlugin!F 6.0.0d8
>!AHDA!C 283.15
|IOHDA!F 283.15
|IOAudio!F 300.6.1
@ vecLib.kext 1.2.0
|IOGraphics!F 585
>!ASMBus!C 1.0.18d1
|Broadcom!BHost!CUSBTransport 8.0.1f5
|IO!BHost!CUSBTransport 8.0.1f5
|IO!BHost!CTransport 8.0.1f5
>usb.!UHub 1.2
>!UMultitouch 264
>usb.IOUSBHostHIDDevice 1.2
>usb.cdc 5.0.0
>usb.networking 5.0.0
>usb.!UHostCompositeDevice 1.2
>!AThunderboltDPInAdapter 8.1.4
>!AThunderboltDPAdapter!F 8.1.4
>!AThunderboltPCIDownAdapter 4.1.1
>!ABSDKextStarter 3
|IOSurface 289.3
@ filesystems.hfs.encodings.kext 1
>!AXsanScheme 3
|IOAHCIBlock!S 332
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|IOThunderbolt!F 9.3.2
|IO80211!F 1200.12.2b1
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>corecapture 1.0.4
>usb.!UHostPacketFilter 1.0
|IOUSB!F 900.4.2
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>!AEFINVRAM 2.1
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$!AImage4 3.0.0
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|IOUSBHost!F 1.2
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@ kec.pthread 1
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Mod-Edit: moved this into a dedicated thread; the thread you posted in was particularly about Plexamp.
Are you using any system-level Adblock, network filtering, or do you have any VPN software installed?
Oh I see you are. TripMode, right?
Uninstall/disable, or check if there’s a Big Sur compatible version. Report back?
Edit: I installed the TripMode 3 trial, and it’s working and I’m not having any problems with Plex Media Server launching. Also, it’s a neat utility.
It appears that even though I had TripMode uninstalled, the software still had its extension on my Mac. After some research, this terminal command completely removed it for me:
systemextensionsctl uninstall 78UFGP42EU ch.tripmode.TripMode.FilterExtension
Plex Media Server now works fine! Thanks!
I have Windscribe VPN installed but disabled. And also a Cisco VPN client, but not active.
If either of those are causing the problem, it might not matter if they’re active or not. I would test uninstalling them.
Edit: You could also share the crash report from Console.app. That made it clear what the problem was in @bernardazar’s case.
Please explain how to give you the console log that you need.
Will try that tomorrow.
I am having the same problem too…When the Plex Server starting and i activate DLNA my iMac (27" late 2017 i7 32GB RAM) crashed. Kernel Panic. I trying to make clean install and test with TimeMachine Restore and without restore. The result was the same. Now i have to install the latest Version of Catalina and restore the CarbonCopyCloner backup an works fine again. I think we must wait for a while.
Does anyone have a workaround?
When you get the kernel panic and it reboots, are you prompted to report the problem? Can you share the text from that? It might help identify the issue.
I just enabled DLNA in Plex, and BANG! Instant kernel panic!
… in content_filter.c, and related to the TripMode FilterExten I installed to test earlier. 
It looks almost identical to the issue @bernardazar reported above.
So I uninstalled TripMode.
And now enabling DLNA in PMS doesn’t crash.
I’m reasonably sure this is an Apple issue, not a TripMode (or other Extension) issue, too. Yes, the DLNA server is tickling it. But absolutely nothing Plex does should be capable of panicking the OS.
(I’ll reach out to the TripMode folks.)
Even with TripMode installed, I didn’t experience a crash until I also enabled the PMS DLNA server.
So you can also try disabling DLNA before launching PMS.
% defaults read com.plexapp.plexmediaserver DlnaEnabled
% defaults write com.plexapp.plexmediaserver DlnaEnabled 0
i think i will let it go until a solution is found without doing too much tinkering with the system.
In the end I don’t even know what I have done.
I let macOS Catalina on the Mac for now. Who knows, maybe next week or month it will look different. At the latest when 11.1 comes …
That does not mean that I will not continue to search…
Same problem. Just installed Big Sur, try to launch Plex Media Server and…crash my macbook pro. Automatic restart/kernel panic. Logs present same error as @bernardazar but instead of Tripmode I use LittleSnitch :
panic(cpu 0 caller 0xffffff801b8bfb71): assertion failed: (MBUFQ_EMPTY(&cfq->q_mq) && cfq->q_start == cfq->q_end) || (!MBUFQ_EMPTY(&cfq->q_mq) && cfq->q_start != cfq->q_end), file: /AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/xnu/xnu-7195.50.7/bsd/net/content_filter.c, line: 1089
Backtrace (CPU 0), Frame : Return Address
0xffffffb0de6736f0 : 0xffffff801b0bc66d
0xffffffb0de673740 : 0xffffff801b1ff073
0xffffffb0de673780 : 0xffffff801b1ef6aa
0xffffffb0de6737d0 : 0xffffff801b061a2f
0xffffffb0de6737f0 : 0xffffff801b0bbf0d
0xffffffb0de673910 : 0xffffff801b0bc1f8
0xffffffb0de673980 : 0xffffff801b8bee1a
0xffffffb0de6739f0 : 0xffffff801b8bfb71
0xffffffb0de673a00 : 0xffffff801b4adcfe
0xffffffb0de673a40 : 0xffffff801b4ae008
0xffffffb0de673bd0 : 0xffffff801b4ac4ef
0xffffffb0de673c20 : 0xffffff801b4a921c
0xffffffb0de673c90 : 0xffffff801b62ecf9
0xffffffb0de673ce0 : 0xffffff801b6a8c20
0xffffffb0de673e00 : 0xffffff801b67d4c8
0xffffffb0de673e30 : 0xffffff801b677e35
0xffffffb0de673ee0 : 0xffffff801b677c47
0xffffffb0de673f40 : 0xffffff801b769ceb
0xffffffb0de673fa0 : 0xffffff801b0621f6
Process name corresponding to current thread: at.obdev.littlesnitch.networkext
Boot args: chunklist-security-epoch=0 -chunklist-no-rev2-dev
I tried to disable Little Snitch but it doesn’t work.
How did you disable Little Snitch?
I just tested, and get the exact same symptoms with Little Snitch. PMS seems to work, but crashes instantly if the DLNA server is started. Disabling the DLNA server seems to prevent the crash.
Disabling Little Snitch from the menu isn’t enough. You have to delete /Applications/Little Snitch.app to uninstall the problematic Network Filter.
I never saw these crashes until I started testing with DLNA enabled. So the other choice seems to be disabling the DLNA server in Plex.
In Terminal:
defaults write com.plexapp.plexmediaserver DlnaEnabled 0
