Kernel panic immediately after login

[dodgie]

Hi,

I have a 2020 27 inch Retina 5K iMac with Sonoma 14.6.1.

Recently I have started getting kernel panics directly after login, where my machine suddenly restarts, I get the "Your computer restarted because of a problem screen": and then most of the time the subsequent login works ok (occasionally this happens a 2-3 of times before I can log in ok).

I get the following problem report, but I'm not overly familiar with how to read them so not quite sure where I should start, it looks like we're possibly trying to launch something on login that is failing because of some missing file? Google seems to suggest that this file is no longer available in more recent MacOS versions so I am thinking that this might be maybe some remnant of some old software installed on my machine which is causing the issue but not sure quite where I can look to see what's going on and how to fix it?

Can anyone help?

panic(cpu 4 caller 0xffffff8018510fce):  initproc failed to start -- exit reason namespace 6 subcode 0x1 description: Library not loaded: /usr/lib/libSystem.B.dylib
  Referenced from: <3FD2B8A3-0C1D-3561-B8E7-BD27484C6C8B> /sbin/launchd
  Reason: tried: '/usr/lib/libSystem.B.dylib' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/usr/lib/libSystem.B.dylib' (no such file), '/usr/lib/libSystem.B.dylib' (no such file, no dyld cache)

uuid info:
 0x112388000    uuid = <18f658dd-20f3-324d-b7ac-8a9c60b574b3>
 0x109f19000    uuid = <3fd2b8a3-0c1d-3561-b8e7-bd27484c6c8b>

Thread 0 crashed

RAX: 0x0000000002000209, RBX: 0x0000000000000001, RCX: 0x00007ff7b5fe5738, RDX: 0x00007ff7b5fe5ba0
RSP: 0x00007ff7b5fe5738, RBP: 0x00007ff7b5fe5780, RSI: 0x0000000000000001, RDI: 0x0000000000000006
R8:  0x00007ff7b5fe57a0, R9:  0x0000000000000000, R10: 0x000000000000003d, R11: 0x0000000000000246
R12: 0x0000000000000000, R13: 0x00007ff7b5fe5ba0, R14: 0x0000000000000006, R15: 0x000000000000003d
RFL: 0x0000000000000246, RIP: 0x00000001123ec87a, CS:  0x0000000000000007, SS:  0x0000000000000023

Thread 0: 0xffffff90aed6e598
    0x00000001123ec87a
    0x0000000112405829
    0x00000001123922b5
    0x000000011238f4bd
    0x000000011238e2e4


Mac OS version:
Not yet set

Kernel version:
Darwin Kernel Version 23.6.0: Mon Jul 29 21:13:00 PDT 2024; root:xnu-10063.141.2~1/RELEASE_X86_64
Kernel UUID: B8A95C25-3789-30A2-AE3C-7A48E0B91426
roots installed: 0
System model name: iMac20,1 (Mac-CFF7D910A743CAAF)
System shutdown begun: NO
Panic diags file unavailable, panic occurred prior to initialization

 

[Fishrrman]

Just a guess, but what login items do you have installed?

Seems to me these would be loaded as the login process begins (i.e., just after you've entered your password).

Could something there be mucking things up?

 

[Bigwaff]

Try running hardware diagnostics

Use Apple Diagnostics to test your Mac - Apple Support

Apple Diagnostics, formerly known as Apple Hardware Test, can check your Mac for hardware issues.

support.apple.com

 

[f54da]

`/usr/lib/libSystem.B.dylib` should be part of the dyld cache. I don't think there's any way to manually recreate the shared cache anymore, it should be part of the sealed volume? I'd recommend reinstalling the OS from recovery (this should not wipe any user data since the two are effectively like separate partitions, but you should take a backup nonetheless especially given you're already seeing some sort of FS corruption)