Panic error

I get this error very often when I work with my MacBook. What might it be and how can I fix it?

panic(cpu 1 caller 0xffffff8017abf5fd): "a freed zone element has been modified in zone flow_divert_pcb: " "expected 0x3a3530cdfb2b780c but found 0, bits changed 0x3a3530cdfb2b780c, " "at offset 0 of 216 in element 0xffffff86b23a4520, cookies 0x3f0011be8b76b75a 0x5352173705dcf57"@/AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/xnu/xnu-7195.81.3/osfmk/kern/zalloc.c:1644
Backtrace (CPU 1), Frame : Return Address
0xffffffa07932b910 : 0xffffff80172bab4d 
0xffffffa07932b960 : 0xffffff80173fd7e3 
0xffffffa07932b9a0 : 0xffffff80173ede1a 
0xffffffa07932b9f0 : 0xffffff801725fa2f 
0xffffffa07932ba10 : 0xffffff80172ba3ed 
0xffffffa07932bb30 : 0xffffff80172ba6d8 
0xffffffa07932bba0 : 0xffffff8017abef9a 
0xffffffa07932bc10 : 0xffffff8017abf5fd 
0xffffffa07932bc60 : 0xffffff8017abf7bc 
0xffffffa07932bcb0 : 0xffffff801731746b 
0xffffffa07932bce0 : 0xffffff801731762b 
0xffffffa07932bd60 : 0xffffff80177388a0 
0xffffffa07932bdc0 : 0xffffff80177c9457 
0xffffffa07932be20 : 0xffffff80178a6f8b 
0xffffffa07932be60 : 0xffffff80178b8679 
0xffffffa07932bf40 : 0xffffff80179698cb 
0xffffffa07932bfa0 : 0xffffff80172601f6 

Process name corresponding to current thread: com.avast.daemon

Mac OS version:
20D91

Kernel version:
Darwin Kernel Version 20.3.0: Thu Jan 21 00:07:06 PST 2021; root:xnu-7195.81.3~1/RELEASE_X86_64
Kernel UUID: C86236B2-4976-3542-80CA-74A6B8B4BA03
KernelCache slide: 0x0000000017000000
KernelCache base: 0xffffff8017200000
Kernel slide:   0x0000000017010000
Kernel text base: 0xffffff8017210000
__HIB text base: 0xffffff8017100000
System model name: MacBookAir6,2 (Mac-7DF21CB3ED6977E5)
System shutdown begun: NO
Panic diags file available: YES (0x0)
Hibernation exit count: 0

Continuation of crash code

MacBook Air 13″, macOS 11.2

Posted on Feb 3, 2024 7:36 AM

Top-ranking reply

HWTech

Community+ 2026

Level 9

75,002 points

Posted on Feb 4, 2024 1:22 PM

Uninstall Avast and any other anti-virus apps, cleaning/optimizer apps, or third party security software by following the developer's instructions. These types of apps are not needed on a Mac and will usually cause more problems than they solve. macOS already has great built-in security especially when the user also practices safe computing habits such as those outlined in this excellent article written by a respected forum contributor:

Effective defenses against malware and other threats - Apple Community

Also, in the past Avast has been caught selling user's personal information to third parties (occurred at least twice IIRC). Plus Avast, or Avast's parent company now owns several other anti-virus, cleaning/optimizer, and security products. Many of these once respected products (respected & needed on Windows years ago anyway, but no longer needed even on Windows today) are no longer the same company or product.

Here is an Apple article about how some of the built-in macOS security features work (Apple may have a couple of other articles as well):

Protecting against malware in macOS - Apple Support

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Panic error

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