This system has experienced kernel panics.

Diagnostics Information (past 7-30 days):

    2023-12-27 07:59:39 bluetoothd - Crash (108 times)

        Executable: /usr/sbin/bluetoothd

        Details: 

            libsystem_c.dylib: abort() called

    2023-12-26 08:20:09 EtreCheckPro - Crash

        Executable: /Applications/EtreCheckPro.app

    2023-12-25 13:36:30 accountsd - Crash

        Executable: /System/Library/Frameworks/Accounts.framework/Versions/A/Support/accountsd

    2023-12-25 13:33:54 Finder.app - Hang

        Executable: /System/Library/CoreServices/Finder.app

    2023-12-25 09:38:41 Kernel Panic (2 times)

        Details:

            panic(cpu 0 caller 0xffffff800df84981): mbuf_watchdog: 2 waiters stuck

             for 11 secs

            Panicked task 0xffffff9f131329d8: 191 threads: pid 0: kernel_task

At first: thank you for your help.

I'm sure it's not a hardware error. The Bluetooth connection works after every restart. But after a standby the connection is interrupted and cannot be reactivated.

See crash report in console:

Translated Report (Full Report Below)

-------------------------------------

Process: bluetoothd [13113]

Path: /usr/sbin/bluetoothd

Identifier: bluetoothd

Version: ???

Code Type: X86-64 (Native)

Parent Process: launchd [1]

User ID: 0

Date/Time: 2023-12-29 15:14:13.3420 +0100

OS Version: macOS 13.6.3 (22G436)

Report Version: 12

Anonymous UUID: 8EB50AFF-C75E-4F11-9216-1384F2C1EC40

Sleep/Wake UUID: A119616D-C359-4242-AB4C-F0FF82EDBB2E

Time Awake Since Boot: 6900 seconds

Time Since Wake: 17 seconds

System Integrity Protection: enabled

Crashed Thread: 1

Exception Type: EXC_GUARD

Exception Codes: GUARD_TYPE_USER

Exception Codes: 0x6000000000000012, 0x0000000000000002

Termination Reason: Namespace LIBSYSTEM, Code 2 Application Triggered Fault

Thread 0:

0 libsystem_kernel.dylib 0x7ff81ae675a2 mach_msg2_trap + 10

1 libsystem_kernel.dylib 0x7ff81ae7571d mach_msg2_internal + 78

2 libsystem_kernel.dylib 0x7ff81ae6e5d4 mach_msg_overwrite + 692

3 libsystem_kernel.dylib 0x7ff81ae6788a mach_msg + 19

4 CoreFoundation 0x7ff81af81fff __CFRunLoopServiceMachPort + 145

5 CoreFoundation 0x7ff81af80a80 __CFRunLoopRun + 1365

6 CoreFoundation 0x7ff81af7fec1 CFRunLoopRunSpecific + 560

7 CoreFoundation 0x7ff81b0035e5 CFRunLoopRun + 40

8 bluetoothd 0x1080008df 0x107fd7000 + 170207

9 dyld 0x7ff81ab4c41f start + 1903

Thread 1 Crashed:

0 libsystem_kernel.dylib 0x7ff81ae72a4a os_fault_with_payload + 10

1 bluetoothd 0x1080bfc98 0x107fd7000 + 953496

2 bluetoothd 0x108068ae3 0x107fd7000 + 596707

3 bluetoothd 0x10839b65f 0x107fd7000 + 3950175

4 bluetoothd 0x10839ca57 0x107fd7000 + 3955287

5 bluetoothd 0x10837ad09 0x107fd7000 + 3816713

6 bluetoothd 0x10837a933 0x107fd7000 + 3815731

7 libdispatch.dylib 0x7ff81ad03d91 _dispatch_call_block_and_release + 12

8 libdispatch.dylib 0x7ff81ad05033 _dispatch_client_callout + 8

9 libdispatch.dylib 0x7ff81ad0b200 _dispatch_lane_serial_drain + 769

10 libdispatch.dylib 0x7ff81ad0bd6c _dispatch_lane_invoke + 417

11 libdispatch.dylib 0x7ff81ad163fc _dispatch_workloop_worker_thread + 765

12 libsystem_pthread.dylib 0x7ff81aea2c55 _pthread_wqthread + 327

13 libsystem_pthread.dylib 0x7ff81aea1bbf start_wqthread + 15

Thread 2:

0 libsystem_kernel.dylib 0x7ff81ae68c8e __workq_kernreturn + 10

1 libsystem_pthread.dylib 0x7ff81aea2cb9 _pthread_wqthread + 427

2 libsystem_pthread.dylib 0x7ff81aea1bbf start_wqthread + 15

I'm already tried this:

1. Remove Bluetooth device and reconnect it.

2. Clear Bluetooth settings on your Mac. (com.apple.Bluetooth.plist)

3. Debugging Bluetooth connections. (sudo pkill bluetoothd)

4. PRAM and NVRAM reset.

Thank you very much for your feedback.

I deleted the APN software and a few others that I no longer need. Now wait and see.