Macbook pro 2019 keeps restarting because of a problem

My macbook pro 2019 keeps restarting because of a problem. It only started happening since I bought and connected my new airpods 4 to it (I have no idea if it’s related or just a coincidence since I tested it and it happens even without the airpods being connected) when I watch stuff on youtube it freezes at some point for a second then it shuts down with a fan noise and restarts, it happens at random intervals sometimes in a few minutes, sometimes it lasts 30 minutes but it keeps on restarting. It happens while using different browsers too. I tried to reset SMC too, did diagnostics but nothing is detected. Is there nothing else I can do besides sending it in for repair?



These are the details:

panic(cpu 0 caller 0xfffffff010d381fc): ANS2 Recoverable Panic - assert failed: [11194]:MSP 4 asserted: assert 9396, args: 0 0 0!!!! - Timer(12)

assert failed: [11194]:MSP 4 asserted: assert 9396, args: 0 0 0!!!!

RTKit: root@Aug 02 2025@17:56:06~.release - Client: t8012.release-AppleStorageProcessorANS2-1310~18817~1310~18817

!UUID: e3dc804d-3ac9-33e0-b948-7ea27aa91ec7

ASLR slide: 0x0000000000000000

Time: 0x00000000f27a147b


Faulting task  12 Call Stack: 0x0000000000016284 0x0000000000015c20 0x0000000000015a2c 0x0000000000017ea8 0x000000000001d68c 0x000000000001d4f8 0x00000000000b7c88 0x0000000000056ebc 0x000000000003db98


Marin ASC Async error info: 

l2c_err_sts 0x10001bfc00000000, l2c_err_adr 000000000000000000, l2c_err_inf 000000000000000000

lsu_err_sts 000000000000000000, fed_err_sts 000000000000000000, mmu_err_sts 000000000000000000

dpc_err_sts 000000000000000000


Mailbox (0): (0)

  Inbox  AKF_KIC_INBOX_CTRL = 0x00022201, AKF_KIC_MAILBOX_SET = 0x00001101

  Outbox AKF_AP_OUTBOX_CTRL = 0x00022201, AKF_AP_MAILBOX_SET  = 0x00000000 

MacBook Pro 16″

Posted on Oct 28, 2025 1:21 AM

Reply
Question marked as Top-ranking reply

Posted on Oct 28, 2025 8:35 AM

neonzonline wrote:

My macbook pro 2019 keeps restarting because of a problem. It only started happening since I bought and connected my new airpods 4 to it (I have no idea if it’s related or just a coincidence since I tested it and it happens even without the airpods being connected) when I watch stuff on youtube it freezes at some point for a second then it shuts down with a fan noise and restarts, it happens at random intervals sometimes in a few minutes, sometimes it lasts 30 minutes but it keeps on restarting. It happens while using different browsers too. I tried to reset SMC too, did diagnostics but nothing is detected. Is there nothing else I can do besides sending it in for repair?


These are the details:
panic(cpu 0 caller 0xfffffff010d381fc): ANS2 Recoverable Panic - assert failed: [11194]:MSP 4 asserted: assert 9396, args: 0 0 0!!!! - Timer(12)
assert failed: [11194]:MSP 4 asserted: assert 9396, args: 0 0 0!!!!
RTKit: root@Aug 02 2025@17:56:06~.release - Client: t8012.release-AppleStorageProcessorANS2-1310~18817~1310~18817
!UUID: e3dc804d-3ac9-33e0-b948-7ea27aa91ec7
ASLR slide: 0x0000000000000000
Time: 0x00000000f27a147b

Faulting task  12 Call Stack: 0x0000000000016284 0x0000000000015c20 0x0000000000015a2c 0x0000000000017ea8 0x000000000001d68c 0x000000000001d4f8 0x00000000000b7c88 0x0000000000056ebc 0x000000000003db98

Marin ASC Async error info: 
l2c_err_sts 0x10001bfc00000000, l2c_err_adr 000000000000000000, l2c_err_inf 000000000000000000
lsu_err_sts 000000000000000000, fed_err_sts 000000000000000000, mmu_err_sts 000000000000000000
dpc_err_sts 000000000000000000

Mailbox (0): (0)
  Inbox  AKF_KIC_INBOX_CTRL = 0x00022201, AKF_KIC_MAILBOX_SET = 0x00001101
  Outbox AKF_AP_OUTBOX_CTRL = 0x00022201, AKF_AP_MAILBOX_SET  = 0x00000000 


re: < ANS2 —Apple NAND Storage 2 >


I might suspect SSD failure on your Intel Machine...


You can run the user Diagnostic...not as definitive as Apple's own AST2 (Apple Service Toolkit) back bench diagnostic, but may kick out an error code.


Use Apple Diagnostics to test your Mac for hardware issues

Use Apple Diagnostics to test your Mac - Apple Support



In or out of warranty you can get a free over the counter 'Apple Service Diagnostics' test /assessment

Make an appointment for a "hardware issue"

Genius Bar Reservation and Apple Support Options - Apple


Outside the USA

Contact Apple Support - Apple Support



Call Customer Support (800) MY–APPLE (800–692–7753)


or on line https://getsupport.apple.com/


or call AppleCare Support at 1-800-APLCARE (800-275-2273)


Outside the USA—Contact Apple for support and service by phone

See a list of Apple phone numbers around the world.

Contact Apple Support - Apple Support




Get your Mac ready for service - Apple Support Get your Mac ready for service - Apple Support


1 reply
Question marked as Top-ranking reply

Oct 28, 2025 8:35 AM in response to neonzonline

neonzonline wrote:

My macbook pro 2019 keeps restarting because of a problem. It only started happening since I bought and connected my new airpods 4 to it (I have no idea if it’s related or just a coincidence since I tested it and it happens even without the airpods being connected) when I watch stuff on youtube it freezes at some point for a second then it shuts down with a fan noise and restarts, it happens at random intervals sometimes in a few minutes, sometimes it lasts 30 minutes but it keeps on restarting. It happens while using different browsers too. I tried to reset SMC too, did diagnostics but nothing is detected. Is there nothing else I can do besides sending it in for repair?


These are the details:
panic(cpu 0 caller 0xfffffff010d381fc): ANS2 Recoverable Panic - assert failed: [11194]:MSP 4 asserted: assert 9396, args: 0 0 0!!!! - Timer(12)
assert failed: [11194]:MSP 4 asserted: assert 9396, args: 0 0 0!!!!
RTKit: root@Aug 02 2025@17:56:06~.release - Client: t8012.release-AppleStorageProcessorANS2-1310~18817~1310~18817
!UUID: e3dc804d-3ac9-33e0-b948-7ea27aa91ec7
ASLR slide: 0x0000000000000000
Time: 0x00000000f27a147b

Faulting task  12 Call Stack: 0x0000000000016284 0x0000000000015c20 0x0000000000015a2c 0x0000000000017ea8 0x000000000001d68c 0x000000000001d4f8 0x00000000000b7c88 0x0000000000056ebc 0x000000000003db98

Marin ASC Async error info: 
l2c_err_sts 0x10001bfc00000000, l2c_err_adr 000000000000000000, l2c_err_inf 000000000000000000
lsu_err_sts 000000000000000000, fed_err_sts 000000000000000000, mmu_err_sts 000000000000000000
dpc_err_sts 000000000000000000

Mailbox (0): (0)
  Inbox  AKF_KIC_INBOX_CTRL = 0x00022201, AKF_KIC_MAILBOX_SET = 0x00001101
  Outbox AKF_AP_OUTBOX_CTRL = 0x00022201, AKF_AP_MAILBOX_SET  = 0x00000000 


re: < ANS2 —Apple NAND Storage 2 >


I might suspect SSD failure on your Intel Machine...


You can run the user Diagnostic...not as definitive as Apple's own AST2 (Apple Service Toolkit) back bench diagnostic, but may kick out an error code.


Use Apple Diagnostics to test your Mac for hardware issues

Use Apple Diagnostics to test your Mac - Apple Support



In or out of warranty you can get a free over the counter 'Apple Service Diagnostics' test /assessment

Make an appointment for a "hardware issue"

Genius Bar Reservation and Apple Support Options - Apple


Outside the USA

Contact Apple Support - Apple Support



Call Customer Support (800) MY–APPLE (800–692–7753)


or on line https://getsupport.apple.com/


or call AppleCare Support at 1-800-APLCARE (800-275-2273)


Outside the USA—Contact Apple for support and service by phone

See a list of Apple phone numbers around the world.

Contact Apple Support - Apple Support




Get your Mac ready for service - Apple Support Get your Mac ready for service - Apple Support


Macbook pro 2019 keeps restarting because of a problem

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