Why is my Mac Studio keep crashing?

This has happened several times in the last week. Does anyone know how to read this report? I fed it to ChatGPT and it says its networking issue. Any thoughts?


panic(cpu 0 caller 0xfffffe00551f1f80): assertion failed: (tx_headroom + state->hlen + mss) <= PP_BUF_SIZE_DEF(pp), file: /AppleInternal/Library/BuildRoots/4~CReWugCaX9FHeboiUOh5onq-UoPFUllnaglE_NM/Library/Caches/com.apple.xbs/TemporaryDirectory.53qRPY/Sources/xnu/bsd/skywalk/nexus/netif/nx_netif_gso.c, line: 280 @uipc_socket.c:8260

Debugger message: panic

Memory ID: 0x6

OS release type: User

OS version: 25F84

Kernel version: Darwin Kernel Version 25.5.0: Tue Jun 9 22:18:58 PDT 2026; root:xnu-12377.121.10~1/RELEASE_ARM64_T6000

Fileset Kernelcache UUID: 32F4D28271521AC511D4722B289D8363

Kernel UUID: E977B940-FDD2-35CD-81B3-EC65AAB8BF5C

Boot session UUID: DC82AF07-6EB3-4EDE-A8FF-E3B5A3320EB5

iBoot version: mBoot-18000.121.3

iBoot Stage 2 version: mBoot-18000.121.3

secure boot?: YES

roots installed: 0

Paniclog version: 15

Debug Header address: 0xfffffe0030255000

Debug Header entry count: 3

TXM load address: 0xfffffe00401b0000

TXM UUID: F0C1A57F-CE44-3DF4-9E86-0CFF02D7C00D

Debug Header kernelcache load address: 0xfffffe00501b0000

Debug Header kernelcache UUID: 32F4D282-7152-1AC5-11D4-722B289D8363

SPTM load address: 0xfffffe00301b0000

SPTM UUID: D249E718-9C0B-36F5-9F6B-24D58BED4606

KernelCache slide: 0x00000000491ac000

KernelCache base: 0xfffffe00501b0000

Kernel slide: 0x00000000491b4000

Kernel text base: 0xfffffe00501b8000

Kernel text exec slide: 0x000000004d880000

Kernel text exec base: 0xfffffe0054884000

mach_absolute_time: 0x5573954865f

Epoch Time: sec usec

Boot : 0x6a515b5d 0x0006c50a

Sleep : 0x00000000 0x00000000

Wake : 0x00000000 0x00000000

Calendar: 0x6a551719 0x00020ae5


Zone info:

Zone map: 0xfffffe14c6000000 - 0xfffffe3ac6000000

. VM : 0xfffffe14c6000000 - 0xfffffe1a92000000

. RO : 0xfffffe1a92000000 - 0xfffffe1d2c000000

. GEN0 : 0xfffffe1d2c000000 - 0xfffffe22f8000000

. GEN1 : 0xfffffe22f8000000 - 0xfffffe28c4000000

. GEN2 : 0xfffffe28c4000000 - 0xfffffe2e90000000

. GEN3 : 0xfffffe2e90000000 - 0xfffffe345c000000

. DATA : 0xfffffe345c000000 - 0xfffffe3ac6000000

Metadata: 0xfffffe9fce010000 - 0xfffffe9fd7810000

Bitmaps : 0xfffffe9fd7810000 - 0xfffffe9fe3520000

Extra : 0 - 0


TPIDRx_ELy = {1: 0xfffffe22fcb6eba0 0: 0x0000000000000000 0ro: 0x000000016f71b0e0 }

CORE 0 is the one that panicked. Check the full backtrace for details.

CORE 1: PC=0x000000018739d36c, LR=0x00000001873b4e28, FP=0x000000016f351030

CORE 2: PC=0xfffffe005491d1b8, LR=0xfffffe005491d1b8, FP=0xfffffe6eb187bee0

CORE 3: PC=0x000000019aa66cd4, LR=0x0000000261324e5c, FP=0x000000016c116ca0

CORE 4: PC=0xfffffe005491d1b8, LR=0xfffffe005491d1b8, FP=0xfffffe6eb224bee0

CORE 5: PC=0xfffffe005491d1b8, LR=0xfffffe005491d1b8, FP=0xfffffe6eb186bee0

CORE 6: PC=0xfffffe005491d1b8, LR=0xfffffe005491d1b8, FP=0xfffffe6eb24cbee0

CORE 7: PC=0xfffffe005491d1b8, LR=0xfffffe005491d1b8, FP=0xfffffe6eb288bee0

CORE 8: PC=0xfffffe005491d1b8, LR=0xfffffe005491d1b8, FP=0xfffffe6eb207bee0

CORE 9: PC=0xfffffe005491d1b8, LR=0xfffffe005491d1b8, FP=0xfffffe6eb331bee0

Compressor Info: 4% of compressed pages limit (OK) and 14% of segments limit (OK) with 0 swapfiles and OK swap space

Panicked task 0xfffffe1d2f1a7980: 1252 pages, 5 threads: pid 762: smbd

Panicked thread: 0xfffffe22fcb6eba0, backtrace: 0xfffffe6eb356a990, tid: 11889073

lr: 0xfffffe00548dc57c fp: 0xfffffe6eb356aa30

lr: 0xfffffe0054a604ec fp: 0xfffffe6eb356aaa0

lr: 0xfffffe0054a5e464 fp: 0xfffffe6eb356ab60

lr: 0xfffffe0054889c40 fp: 0xfffffe6eb356ab70

lr: 0xfffffe00548dc888 fp: 0xfffffe6eb356b090

lr: 0xfffffe00551e09b0 fp: 0xfffffe6eb356b0b0

lr: 0xfffffe00551f1f80 fp: 0xfffffe6eb356b0f0

lr: 0xfffffe0054fd7bd0 fp: 0xfffffe6eb356b230

lr: 0xfffffe0054fd8170 fp: 0xfffffe6eb356b2b0

lr: 0xfffffe0054bafb44 fp: 0xfffffe6eb356b400

lr: 0xfffffe0054d06e6c fp: 0xfffffe6eb356b710

lr: 0xfffffe0054d23c80 fp: 0xfffffe6eb356b800

lr: 0xfffffe0054d22d78 fp: 0xfffffe6eb356baa0

lr: 0xfffffe0054d368d8 fp: 0xfffffe6eb356bb30

lr: 0xfffffe0054ef09d0 fp: 0xfffffe6eb356bca0

lr: 0xfffffe0054ec5e5c fp: 0xfffffe6eb356bcd0

lr: 0xfffffe0054ebdcac fp: 0xfffffe6eb356bd20

lr: 0xfffffe0054ebe1dc fp: 0xfffffe6eb356bd90

lr: 0xfffffe0054ebe7c8 fp: 0xfffffe6eb356bdf0

lr: 0xfffffe0054ff0cdc fp: 0xfffffe6eb356be50

lr: 0xfffffe0054a5e4f4 fp: 0xfffffe6eb356bf10

lr: 0xfffffe0054889c40 fp: 0xfffffe6eb356bf20

lr: 0x0000000187315b8c fp: 0x0000000000000000



last started kext at 814837807: com.apple.filesystems.afpfs 11.5 (addr 0xfffffe0050db6870, size 53552)

loaded kexts: (skipped, see boot kernelcache)




** Stackshot Succeeded ** Bytes Traced 1199326 (Uncompressed 3294720) **


Posted on Jul 13, 2026 10:48 AM

Reply
Question marked as Top-ranking reply

Posted on Jul 13, 2026 11:49 AM

The best way to proceed is to provide the free EtreCheck report using the Additional Text option when posting here. The report contains no personal information and will provide details about your third party launch processes that have been installed and additional details about the crashes that have been reported.

How to use the Add Text Feature When Post… - Apple Community


A VPN and Antivirus software are common problems that can cause networking issues and also crash your computer. Other third party tools like CleanMyMac can also cause crashes on your computer or the use of Not Signed software that will be identified in the report.

8 replies
Question marked as Top-ranking reply

Jul 13, 2026 11:49 AM in response to ctphoto1

The best way to proceed is to provide the free EtreCheck report using the Additional Text option when posting here. The report contains no personal information and will provide details about your third party launch processes that have been installed and additional details about the crashes that have been reported.

How to use the Add Text Feature When Post… - Apple Community


A VPN and Antivirus software are common problems that can cause networking issues and also crash your computer. Other third party tools like CleanMyMac can also cause crashes on your computer or the use of Not Signed software that will be identified in the report.

Jul 13, 2026 12:20 PM in response to Mac Jim ID

I only use a VPN on demand, it is not running often. I use no antivirus software. I do use CleanMyMac and of course many non Apple Store softwares.


ChatGPT points to one thing: Your Mac froze because macOS suffered a kernel panic in its networking system while the Mac’s SMB file-sharing service was transmitting data. nx_netif_gso.c is part of Apple’s low-level Skywalk networking system. GSO means Generic Segmentation Offload, which prepares large outgoing network transfers for transmission as smaller Ethernet packets.

During an outgoing SMB transfer, macOS calculated that a packet—including its headers and maximum segment size—would be larger than the networking buffer allowed. Instead of handling that condition normally, the Apple kernel hit an internal assertion and deliberately shut down.

That shutdown is what appeared as the Mac freezing and restarting.


Thanks for replying Mac Jim ID!


Jul 13, 2026 1:12 PM in response to ctphoto1

To be honest, you have so many problematic things going on with your computer, it may be best to start fresh with a clean install and don't add the problematic files offered by SetApp including CleanMyMac or other cleaner or the multiple VPN's. There was a reason why I was able to point at CleanMyMac and VPN use as potential problems even before knowing you had them installed and also the Unsigned software being problematic. Here are a few problems noted:

  • SetApp is a third party distributor and not a reliable source for malware free software.
  • /etc/hosts - Count 12 entry indicates modifications made to your hosts file that is directly responsible for network connections.
  • Turning off a VPN does not mean you are not using it and the network altering processes remain on your computer and continue to interfere with those connections.
  • You are showing Secure Boot: Reduced Security, which is not recommended but probably required for you to install some third party Kernel Extensions that would otherwise not be possible on a secure Mac.
  • Unsigned File at /Library/LaunchAgents/com.maintain.ShutDown.plist
  • Unsigned File at ~/Library/LaunchAgents/com.topazlabs.veai.nukepath.plist
  • Unsigned File at /Library/LaunchAgents/com.maintain.Restart.plist
  • The app located at ~/Applications/Chrome Apps.localized/Google Voice.app required Gatekeeper bypass and probably not a legitimate app or was installed from an illegitimate source.
  • /Applications/Setapp/ClearVPN.app is a System Extension running whether you have the VPN turned on or not.
  • Tailscale Network Extension is a System Extension running where the Application is not even found.
  • WireGuardSystemExtension-Setapp-Version is another System Extension installed altering your network connections.
  • Moonlock Protection is another System Extension for altering network connections where the application is also not found.
  • DuckDuckGo VPN Network Extension is another System Extension for VPN use. Using DDG alone may not be a problem, but when combines with the multiple other VPN and networking altering extensions, you should expect problems.
  • Not signed file com.google.keystone.daemon.plist
  • com.macpaw.CleanMyMac-setapp.Agent.plist - Don't recommend it for the reasons already stated and due to the SetApp distribution.
  • com.piriform.ccleaner.engine.xpc.plist - Along with CleanMyMac, cleaners are not recommended.
  • com.piriform.ccleaner.services.submit.plist - Same as above. This file as well as the others are in your Launch folders whether you use the apps or not.
  • com.piriform.ccleaner.services.xpc.plist - Yet another needless process in your Launch folder
  • com.piriform.ccleaner.uninstall.plist - Here we go again
  • com.piriform.ccleaner.update.xpc.plist - See a pattern there with so many launch processes.
  • Nektony App Cleaner is yet another cleaner program running on your computer.
  • iMazing can have disastrous effects on your computer and security depending on what tools you choose to use.
  • Kernel Panics can also be cause be external drives connected and corresponding drive management software, testing without connected device may be useful to narrow down any particular device.
  • BackBlaze is using 99% of your CPU.


You can try working backwards to remove the latest applications you have installed since you started experiencing the problem, but I would suspect you have multiple issues going on there not only with crashes, but poor internet speed, and slowness in the UI where you may even see the beachball from time to time.

Jul 13, 2026 1:59 PM in response to ctphoto1

Sorry I could not point to a single simple solution and welcome any other input here from other users who would like to chime in. Whether they dispute my analysis or agree with me is perfectly acceptable.


I don't often recommend the nuclear option of clean install and manual app installation, but in this case I think it is warranted. Don't install any cleaners and VPN use should only be necessary when required by a School/Work environment where they will provide the VPN options and settings that are specific for their network. Even though a VPN is marketed as providing security to your device, they do the exact opposite by creating a hole in your network traffic by routing to a third party server, leaving your data exposed and personal information in jeopardy.

Jul 14, 2026 8:08 AM in response to ctphoto1

The two biggest problems are CleanMyMac and CCCleaner. Try uninstalling both of these by following their developer's instructions. If you still have problems, then uninstall the VPN software and deal with the Hosts file.


Some of those Launch Agents/Daemons are really odd with those extremely long commands....very rare to see something like that (TopazLabs is one of those as an example).


I also noticed that you have one or two external drives that appear to be connected to a USB2 hub which will certainly severely impact performance on those drives. One is your 28TB WD and these items:


USB 3.1 Bus

USB2.0 Hub

USB2.0 BILLBOARD

USB 2.0 Hub

Thunderbolt Dock 96W

CP1500AVRLCD3

My Book



Jul 13, 2026 2:08 PM in response to ctphoto1

Junk, and another way to deal with it:

You have accumulated way, way, way too much junk on your Mac.


In this context, “junk" is like stuff in your attic -- it may be perfectly good, but is not needed right now.


It is very difficult to get rid of such junk. I suggest you not even TRY.

Consider using this method instead:


check your trusted backup for completely up-to-date. consider making another on another drive.

ERASE your Mac,

Re-Install MacOS ONLY,

then add your Production apps like Adobe, and nothing additional.

Restore ONLY your Files from backup.


Then Follow this rule:


Only ONE non-Apple add-on is allowed to be added per day. If you already used up today's one, you have to wait until tomorrow to add another. No saving up unused add-ons as credits.


Jul 14, 2026 5:20 AM in response to Grant Bennet-Alder

I understand the need to nuke and pave this Mac, but it is my everyday driver at work and can not afford the downtime right now. Perhaps during vacation period.


But what it has done is make me aware of the years of collecting apps etc that I hardly use at all. I will, several times a day now, review what I have installed and delete not needed items and their siblings.


Thanks for the responses!

Why is my Mac Studio keep crashing?

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