My MacBook Air keeps crashing

There are 4 replies in this Thread which has previously been viewed 372 times. The latest Post () was by aficionado.

    Are you smart? Smart technologies


    aficionado , thanks for the links. I can't find any kernel log in that location, but I did save a log on my own last month (pasted below).

    I even went to the Apple reseller in Abasto for assistance, but they wanted me to leave my notebook for 2 days and the Abasto mall is sketchy. The guy didn't see knowledgeable at all.


    I do agree about the battery and stuff, but it is two components going offline (notebook and hard disk). Also, the notebook restarts even if the external HD is not connected to it.


    It must be said that the electrical wiring in my office is shit, as it was done illegally by the previous owners. lights and appliances all run on the same circuit, and I am not sure there is a proper ground connection. (However, our STR is in a brand new apartment, so that excuse doesn't hold over there).


    I have run the First Aid on my computer hard disk and on my external hard disk and no issue was found.



    This is the kernel panic message I saved from February:


    panic(cpu 1 caller 0xfffffe001b526970): userspace panic: boot task failure: mount-phase-2 - exited due to SIGABRT

    Debugger message: panic

    Memory ID: 0x6

    OS release type: User

    OS version: 23C71

    Kernel version: Darwin Kernel Version 23.2.0: Wed Nov 15 21:53:34 PST 2023; root:xnu-10002.61.3~2/RELEASE_ARM64_T8103

    Fileset Kernelcache UUID: 6DAC2CF8E68E8F436296A697E29AAD44

    Kernel UUID: E245D804-1FA3-31E2-90BC-B4DF75B2129E

    Boot session UUID: 4D8F8021-7AAC-4D72-8B04-1268AA8D1670

    iBoot version: iBoot-10151.61.4

    secure boot?: YES

    roots installed: 0

    Paniclog version: 14

    KernelCache slide: 0x0000000012798000

    KernelCache base:  0xfffffe001979c000

    Kernel slide:      0x00000000127a0000

    Kernel text base:  0xfffffe00197a4000

    Kernel text exec slide: 0x0000000013cac000

    Kernel text exec base:  0xfffffe001acb0000

    mach_absolute_time: 0x2da02a99

    Epoch Time:        sec       usec

      Boot    : 0x65bba055 0x0001dbe2

      Sleep   : 0x00000000 0x00000000

      Wake    : 0x00000000 0x00000000

      Calendar: 0x65bba06f 0x0004562a

    Zone info:

      Zone map: 0xfffffe100b530000 - 0xfffffe300b530000

      . VM    : 0xfffffe100b530000 - 0xfffffe14d81fc000

      . RO    : 0xfffffe14d81fc000 - 0xfffffe1671b94000

      . GEN0  : 0xfffffe1671b94000 - 0xfffffe1b3e860000

      . GEN1  : 0xfffffe1b3e860000 - 0xfffffe200b52c000

      . GEN2  : 0xfffffe200b52c000 - 0xfffffe24d81f8000

      . GEN3  : 0xfffffe24d81f8000 - 0xfffffe29a4ec4000

      . DATA  : 0xfffffe29a4ec4000 - 0xfffffe300b530000

      Metadata: 0xfffffe3021540000 - 0xfffffe3029540000

      Bitmaps : 0xfffffe3029540000 - 0xfffffe302c338000

      Extra   : 0 - 0

    CORE 0 recently retired instr at 0xfffffe001ae5c6e4

    CORE 1 recently retired instr at 0xfffffe001ae5aee8

    CORE 2 recently retired instr at 0xfffffe001ae5c6e4

    CORE 3 recently retired instr at 0xfffffe001ae5c6e4

    CORE 4 recently retired instr at 0xfffffe001ae5c6e4

    CORE 5 recently retired instr at 0xfffffe001ae5c6e4

    CORE 6 recently retired instr at 0xfffffe001ae5c6e4

    CORE 7 recently retired instr at 0xfffffe001ae5c6e4

    TPIDRx_ELy = {1: 0xfffffe1b3e617010  0: 0x0000000000000001  0ro: 0x000000016bccb0e0 }

    CORE 0 PVH locks held: None

    CORE 1 PVH locks held: None

    CORE 2 PVH locks held: None

    CORE 3 PVH locks held: None

    CORE 4 PVH locks held: None

    CORE 5 PVH locks held: None

    CORE 6 PVH locks held: None

    CORE 7 PVH locks held: None

    CORE 0: PC=0xfffffe001ad43f30, LR=0xfffffe001ad43f30, FP=0xfffffe7498fabef0

    CORE 1 is the one that panicked. Check the full backtrace for details.

    CORE 2: PC=0xfffffe001ad43f30, LR=0xfffffe001ad43f30, FP=0xfffffe7498effef0

    CORE 3: PC=0xfffffe001ad43f30, LR=0xfffffe001ad43f30, FP=0xfffffe7498e7fef0

    CORE 4: PC=0xfffffe001ad43f30, LR=0xfffffe001ad43f30, FP=0xfffffe7499053ef0

    CORE 5: PC=0xfffffe001ad43f30, LR=0xfffffe001ad43f30, FP=0xfffffe7498cf3ef0

    CORE 6: PC=0xfffffe001ad43f30, LR=0xfffffe001ad43f30, FP=0xfffffe7499047ef0

    CORE 7: PC=0xfffffe001ad43f30, LR=0xfffffe001ad43f30, FP=0xfffffe7498db3ef0

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

    Panicked task 0xfffffe16723c4b38: 171 pages, 4 threads: pid 1: launchd

    Panicked thread: 0xfffffe1b3e617010, backtrace: 0xfffffe7498edb690, tid: 3087

      lr: 0xfffffe001ad09568  fp: 0xfffffe7498edb720

      lr: 0xfffffe001ae53a24  fp: 0xfffffe7498edb790

      lr: 0xfffffe001ae51e84  fp: 0xfffffe7498edb880

      lr: 0xfffffe001acb7b68  fp: 0xfffffe7498edb890

      lr: 0xfffffe001ad08e48  fp: 0xfffffe7498edbc40

      lr: 0xfffffe001b51b324  fp: 0xfffffe7498edbc60

      lr: 0xfffffe001b526970  fp: 0xfffffe7498edbcc0

      lr: 0xfffffe001b209fd0  fp: 0xfffffe7498edbd40

      lr: 0xfffffe001b22cfbc  fp: 0xfffffe7498edbd90

      lr: 0xfffffe001b32eb74  fp: 0xfffffe7498edbe20

      lr: 0xfffffe001ae51fc4  fp: 0xfffffe7498edbf10

      lr: 0xfffffe001acb7b68  fp: 0xfffffe7498edbf20

    last started kext at 302643734: com.apple.iokit.IOAVBFamily 1220.1 (addr 0xfffffe0019eb2060, size 32019)

    loaded kexts:

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    ** Stackshot Succeeded ** Bytes Traced 43930 (Uncompressed 155504) **

    Quote from serafina

    panic: boot task failure: mount-phase-2 - exited

    This error logged at the top of that list indicates the reason was when a disk volume is mounting. That is probably the reattach of the external HD. Though it says “boot task” so this log entry could be a second panic when the machine is booting up after the first panic. You should leave the external HD unplugged for a day or more to see if you can get a panic again. Then view the log. Look for more than one panic at that time.


    Lots of people searching Google for macOS Sonoma panics OS version: 23C71 panic


    I have a few older MBPs. I do not recall ever having any panic issues. Or not recent enough for me to remember. Reset of the NVM is a common thing I know is often suggested.

    Quote from aficionado

    You should leave the external HD unplugged for a day or more to see if you can get a panic again.

    It did not crash while the external HD is not connected. Thank you so much for the suggestion.

    Now the next question is: is it the HD fault or the external hub?


    My Macbook Air has only two USB-C ports - one I need to connect the external monitor, one is used to attach a multi-port hub (with USB, USB-C, HDMI, RJ-45 ports)


    The hub has a dedicated USB-C port for the Macbook power cord, and then I have connected the external HD where I do my Time Machine.

    If you are having power outages and brown-outs that will result in the losing power to usb-c hub which will cause the usb HD to force dismount. I had originally mentioned the power loss of HD as the problem thinking you had a powered external HD, though the new info about the powered hub is the same idea.


    The quick forced dismount and remount of a drive volume and the mention of that in the kernel panic message is causing the MacBook to gak out in some way. I suggest you put the USB-c Hub on a UPS battery backup. Though it is strange if you are really having that many power issues in your home, especially now that summer surges should be less. That could mean, as you ask, that maybe the hub is dying. Less likely it is the external HD causing that problem, though the effect of this issue could be damaging to the HD.


    You could move your Time Machine to be a NAS ( networked attached storage). Can be expensive or a simple USB HD plugged into many modern routers which have that NAS option.


    This is the UPS I recently bought. And a protector de tensionfor the clothes washer machine which also displays the Voltage so we will quickly know when brownouts are occurring. A few pesos extra for the con USB option to allow power monitoring of the UPS from my computer, but each model has con/sin options. I have several UPS, though most important on the internet router and the smart hub (OpenHAB on linux raspberry pi).


    Remember you should have redundancy as part of your backup. You should have at least two external HD as TimeMachines. Swap them out and store the other off-site every week/month. Cloud backup is ideal too. I use arq software with my own cloud, though arq has a cloud plan.