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  1. #1
    imac keeps crashing, rebooting?
    macgig's Avatar
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    imac keeps crashing, rebooting?
    this last time, firefox was the only program running. it's done it like 4 times in the last few hours. I was using a program that kept crashing, now that program works. it's android file transfer... Im using it to get data back on the phone that was lost when I had to reset the phone. any ideas whats causing the reboots?


  2. #2
    imac keeps crashing, rebooting?
    macgig's Avatar
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    zapped PRAM... crashed again. I have applecare so I called apple. I reinstalled the OS, new copy. I'll see if that helps... I deleted tech tool pro 12 and it's protection. if you recall I was using Tech tool a month or so ago and having issues... turns out Tech tool is not ready for the apple file system yet, so maybe that caused problems? I was getting some apple file system errors in disk utility, id like to restart and see if the errors are gone now that I reinstalled the OS.


  3. #3
    imac keeps crashing, rebooting?
    chscag's Avatar
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    Are you sure Tech Tool Pro is the problem? According to Micromat, version 12 is fully compatible with Catalina which means it understands APFS.

    TechTool Pro 12

    However, there have been several reports that the Android File Transfer app has caused problems with Catalina.

  4. #4
    imac keeps crashing, rebooting?
    macgig's Avatar
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    Quote Originally Posted by chscag View Post
    Are you sure Tech Tool Pro is the problem? According to Micromat, version 12 is fully compatible with Catalina which means it understands APFS.

    TechTool Pro 12

    However, there have been several reports that the Android File Transfer app has caused problems with Catalina.


    Tech tool pro has some features that wont work with apple file system. Im not sure why the tech tool makers say its compatible with Catalina. But it could be something else causing it right now I'm not sure. Android File Transfer has always been a little flaky so nothing new there I guess.
    Last edited by macgig; 01-03-2020 at 04:21 PM.


  5. #5
    imac keeps crashing, rebooting?
    Lifeisabeach's Avatar
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    Quote Originally Posted by macgig View Post
    Tech tool pro has some features that wont work with apple file system. Im not sure why the tech tool makers say its compatible with Catalina. But it could be something else causing it right now I'm not sure. Android File Transfer has always been a little flaky so nothing new there I guess.
    The simplest thing to do is a process of elimination. Since you've removed TechTool Pro and reinstalled macOS, try using Android File Transfer as before. If it starts crashing again, that app "could" be the culprit, but not an absolute given (but would virtually eliminate TTP as being the problem before). Purge the app off your system and then use your Mac extensively with other tasks to see if it crashes or not. A review of the crash logs may provide some insight.

    Please verify and include the exact model/year of your Mac and OS X version number (available from "About This Mac", then "More Info" on the Apple menu).
    ------
    Links: Onyx | Find Any File | Apple Hardware Test | How to test your hard drive | DetectX: Malware monitoring and removal | Uninstall MacKeeper
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    Lifeisabeach - Mac-Forums Member of the Month June 2009, Feb 2012, and March 2013.

  6. #6
    imac keeps crashing, rebooting?
    macgig's Avatar
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    the crashing and rebooting seems to have been fixed. keeping my fingers crossed. disk utility is showing cross check errors, and this: warning: found physical extent corruption but repairs are disabled.

    why are repairs disabled? who or what disabled them? beats me... perhaps Im worrying over nothing... .I rebooted in diagnostic mode and it says "no issues found"
    Last edited by macgig; 01-04-2020 at 11:55 AM.


  7. #7
    imac keeps crashing, rebooting?
    Lifeisabeach's Avatar
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    Quote Originally Posted by macgig View Post
    the crashing and rebooting seems to have been fixed. keeping my fingers crossed. disk utility is showing cross check errors, and this: warning: found physical extent corruption but repairs are disabled.

    why are repairs disabled? who or what disabled them? beats me... perhaps Im worrying over nothing... .I rebooted in diagnostic mode and it says "no issues found"
    It sounds like maybe your drive is starting to go south. There's a link in my signature with tips on how to test it, though you have TechTool Pro available to you and that has tools to test your drive. I don't have an answer as to why repairs are disabled, but some quick googling turned up a discussion on Apple's support forums where someone was only able to resolve this by completely wiping the drive and reformatting it before restoring a backup.
    APFS, fsck_apfs and 'physical extent - Apple Community

    Please verify and include the exact model/year of your Mac and OS X version number (available from "About This Mac", then "More Info" on the Apple menu).
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  8. #8
    imac keeps crashing, rebooting?
    MacInWin's Avatar
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    +1 for what LIAB said. It does sound like the drive is dying.

    You asked:
    why are repairs disabled? who or what disabled them? beats me... perhaps Im worrying over nothing... .I rebooted in diagnostic mode and it says "no issues found"
    One cannot repair some parts of the boot drive. To do that, you have to boot from something other than the drive with the errors, run First Aid on the drive with errors from there, then reboot to the repaired drive. Been that way for as long as I can remember.
    Jake

  9. #9
    imac keeps crashing, rebooting?
    macgig's Avatar
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    imac shut down again today. no warning the screen goes black and it shuts down.... so I reinstalled osx again. that fixes it for a while... think my applecare just ended... of course.


    cant for the live of me figure out what is causing this? last time this happened was about 3 months ago....


  10. #10
    imac keeps crashing, rebooting?
    chscag's Avatar
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    As the replies above stated, your hard drive could be failing. Have you tried to run First Aid on the drive to see what it says?

    Also, since you have Tech Tool Pro 12, what does it say?

  11. #11
    imac keeps crashing, rebooting?
    Rod's Avatar
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    Back it up now if you haven't already.
    Is this the 2015 iMac Pro listed in your profile? If so, then assuming its the original HD it could be dying. I agree with Jake here, its impossible to run repairs on some parts of the drive if it is the boot drive. You would need to boot from another source to do that.
    One word of caution though, reinstalling the OS may solve some problems but my experience has been that the more you try to erase and write to a failing disk the worse it gets.
    I don't suppose you kept a copy of the macOS installer? If you did you can create a bootable installer from it using DiskmakerX (make sure its the version for your Operating System) or Instal Disk Creator on a USB thumb drive, both free. With it you can boot the device and run Disk Utility or Instal a macOS to a new or erased HD. Makes a very handy tool and saves downloading the macOS multiple times.
    Don't be an April Fool: WORLD BACKUP DAY MARCH 31st

  12. #12
    imac keeps crashing, rebooting?
    Randy B. Singer's Avatar
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    Quote Originally Posted by chscag View Post
    Are you sure Tech Tool Pro is the problem? According to Micromat, version 12 is fully compatible with Catalina which means it understands APFS.
    Very sadly, the folks at MicroMat are liars. (If you dig deeper into their Web site they admit this.)

    Apple hasn't released the full specs for APFS, so no one other than Apple has a disk utility that will work with it. APFS has been out for a long time now. It looks very much like utilities like Disk Warrior and TechTool Pro are an anachronism that will never again be useful.
    Randy B. Singer
    Co-author of The Macintosh Bible (4th, 5th, and 6th editions)
    Mac OS X Routine Maintenance http://www.macattorney.com/ts.html

  13. #13
    imac keeps crashing, rebooting?
    Randy B. Singer's Avatar
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    In my experience Macs tend to spontaneously shut down and re-boot for one of three
    reasons.

    1) There is too much current draw on the electrical circuit your Mac
    is attached to. For example, a refrigerator cycling on, or a laser
    printer starting up, will cause a huge draw. It might be enough to
    cause your Mac to have a hard crash and then re-boot.

    2) Your Mac is overheating. With old Macs this might be due to the
    accumulation of dust inside the case insulating the heat coming from
    the motherboard. Or detritus in the case might be strangling your
    fans. Or your fans may be failing. If it is one of the first two,
    opening up your Mac and cleaning it out may be all that is necessary
    to fix things.

    3) A failing power supply (flyback) or simply cold solder joints
    around your power supply. Often the heat cycling in your Mac expands
    and contracts the solder joints and causes them to eventually crack
    (you can feel these cracks with your fingernail - but don't try this
    without discharging your power supply first!) and causes a
    discontinuity. Touching the solder joints for the power supply with
    the tip of a soldering pen to re-flow the solder easily fixes cold
    solder joints (but once again, don't try this
    without discharging your power supply first!).
    Randy B. Singer
    Co-author of The Macintosh Bible (4th, 5th, and 6th editions)
    Mac OS X Routine Maintenance http://www.macattorney.com/ts.html

  14. #14
    imac keeps crashing, rebooting?
    macgig's Avatar
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    @Rod. 2015 imac. not a imac pro. if its the hard drive going bad, I've never had one die this soon on any mac i've owned. 5 years is all I get out of it? it is mechanical so I guess that is possible.

    going to run tech tool and disk utility now to see what they find.... little rusty on this stuff, I cant boot from the same disk I'm checking correct? good info Randy thanks.


  15. #15
    imac keeps crashing, rebooting?
    macgig's Avatar
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    here is what disk utility says:

    error: Cross Check : ExtentRef physical extent (0x32cf8d + 1) has kind APFS_KIND_UPDATE but was not referenced previously
    error: Cross Check : ExtentRef physical extent (0x32cf8f + 1) has kind APFS_KIND_UPDATE but was not referenced previously
    error: Cross Check : ExtentRef physical extent (0x32cf90 + 253) has kind APFS_KIND_UPDATE but was not referenced previously
    Checking the fsroot tree.
    error: Cross Check : FSroot tree references extent (0x32cf8f + 254) which is not present in the ExtentRef tree
    error: Cross Check : FSroot tree references extent (0x32cf90 + 253) which is not present in the ExtentRef tree
    error: Cross Check : Mismatch between extentref entry reference count (0) and calculated fsroot entry reference count (1) for extent (0x32cf90 + 253)
    warning: found physical extent corruption but repairs are disabled
    The volume /dev/rdisk1s1 appears to be OK.



    repairs are disabled? who disabled them? so DU can't fix it? :/

    now on to see what tech tool says.


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