Helge Schwarz

Q: iMac 27 pci pause: sdxc

My iMac 27 late 2012 is running the latest version of Maverics.

 

since vour weeks now the macine stops during boot wit the following line: (taken from verbose boot)

 

pci pause: sdxc

 

I can boot from a external device just fine and ran Apple disgnostics and internet recovery since I did assume a problem with internal hard drive.

however the last line during verbose boot refers to the SD slot. this slot is unused ever since.

 

any idea what is going wrong here?

Posted on Jul 5, 2014 12:53 AM

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Q: iMac 27 pci pause: sdxc

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  • by Helge Schwarz,

    Helge Schwarz Helge Schwarz Aug 21, 2014 1:41 AM in response to Rasti
    Level 1 (51 points)
    iPad
    Aug 21, 2014 1:41 AM in response to Rasti

    Which poves my point. A system shold work flawless directly after boot.

  • by kbhend,

    kbhend kbhend Sep 7, 2014 10:36 AM in response to Helge Schwarz
    Level 1 (0 points)
    Sep 7, 2014 10:36 AM in response to Helge Schwarz

    Hi,

     

    Exact same problem today.  My post is here:  https://discussions.apple.com/thread/6453797  I am very glad I found this thread.  I used the trick to boot into single user mode and disable fsck and then reboot (took about 10 minutes) and finally rebooted.  BTW: both fsck and DiskUtility report absolutely no problems with my harddrive.   Not sure what is going on but nothing in the logs seems to be helping.

     

    Kevin

  • by Technobilder,

    Technobilder Technobilder Sep 20, 2014 7:28 AM in response to kbhend
    Level 1 (11 points)
    Mac OS X
    Sep 20, 2014 7:28 AM in response to kbhend

    I have absolutely the same problem with my MacBookPro here: MacBook Pro Retina Mid 2012 (MacBookPro10,1 NVIDIA GPU)


    I bought this MBPro used over eBay and after I got it the seller checked it again and told me it was defect with a black screen.
    He brought it to repair in germany and a new mainboard was installed - the MBPro run ok with OSX 10.8 as far I noticed.

     

    So I upgraded to 10.9.5 and install my system from a timemachine backup and now I have the same pci pause: sdxc error :-(

  • by HenkfromWinterswijk,

    HenkfromWinterswijk HenkfromWinterswijk Sep 21, 2014 11:50 PM in response to Helge Schwarz
    Level 1 (4 points)
    iPad
    Sep 21, 2014 11:50 PM in response to Helge Schwarz

    Well Helga,

     

    Sorry for my terrible English.

     

    I have the same problem.

     

    I have a Mac Mini i7 10 GByte ram.

     

    I can work with no problem with my Mac. Day after day.

     

    But when I reboot my Mac it stops with booting on the line.

     

    Pci pause: SDXC

     

    I tested everything, hardware test, memory test so the internal drive test.

     

    the question is; is it a hardware problem or een software problem?

     

    I don't now. !!!

     

    Grusse aus Winterswijik die Niederlande.

     

    Henk

  • by kbhend,

    kbhend kbhend Sep 22, 2014 6:56 AM in response to HenkfromWinterswijk
    Level 1 (0 points)
    Sep 22, 2014 6:56 AM in response to HenkfromWinterswijk

    Hi,

     

    I used "That Guys" solution from earlier in this thread and once I had it booting, no problems since.  Here are the main points from That Guys post.

     

    1. Enter the Single-user boot mode (cmd+s at launch)

    2. Type those lines :

    root# /sbin/mount -uw /

    root# mv /sbin/fsck /sbin/fsck.off
    root# cp /usr/bin/true /sbin/fsck

    3. Restart your computer, enter verbose mode (hold cmd+v)

    4. Wait for it, it took 2 min to boot (instead of 1h of wasteful wait i had experienced), after being stuck at pci pause : sdxc

    5. Now, you might consider putting fsck back.

     

    And to put it back you do the following after everything boots properly.

     

    root#  cp /sbin/fsck.off /sbin/fsck

     

    Since I have done this, no problems since.  It took my computer about 20-25 minutes to finally boot in his step 4 not the 2 minutes he quoted.  I did verify that the fsck run on the boot drive said everything was okay (or run DiskUtility).  One other thing I changed was to put fresh batteries in my mouse and keyboard just in case low voltage was causing issues with my wireless mouse/keyboard causing flakey interrupts.

     

    Please give "That Guys" solution a try as it worked for me and I have been rock solid since.

     

    Hope this helps,

     

    Kevin

  • by HenkfromWinterswijk,

    HenkfromWinterswijk HenkfromWinterswijk Oct 7, 2014 7:10 AM in response to kbhend
    Level 1 (4 points)
    iPad
    Oct 7, 2014 7:10 AM in response to kbhend

    I've tried it!

     

    Maybe I have made a typing error!

     

    Example the spaces between the commands.

     

    Well it didn't help. Again maybe type errors by me.

     

    I will try it again the next time.

     

    Thank you for the post

     

    Regards.

     

    Henk

  • by David.Shaw,

    David.Shaw David.Shaw Nov 2, 2014 1:29 PM in response to HenkfromWinterswijk
    Level 2 (200 points)
    Nov 2, 2014 1:29 PM in response to HenkfromWinterswijk

    I also noticed a system problem with a 2012 Mac Mini, the boot into single user mode showed "Pci pause: SDXC"

     

    as this was a new 'feature'/bug! to me I was able to reverse the most recent change that I made to my Mac mini, which was playing in the Energy Settings pane of Control panel (OS X Mavericks 10.9.5 Build 13F34) which I tend to think may be responsible for my problems?

     

    I had recently set to      'Selected' Put hard disks to sleep when possible

                                       'NOT Selected' Wake for network access

                                       'Selected' Enable Power Nap

    and I set Computer sleep: to Never

    perhaps co-incidentally I then got quite annoying pauses/freezes of normal computer use & the "Pci pause: SDXC"

     

    so I set everything power-saver back to

                                       'NOT Selected' Put hard disks to sleep when possible

                                       'NOT Selected' Wake for network access

                                       'NOT Selected' Enable Power Nap

    and I set Computer sleep: to 3hrs

     

    and it is performing as it used to!

     

    more hardware details Macmini6,1 , 2.5GHz Intel Core i5, 10GB 1600MHz DDR3, HDD Seagate Momentus 1TB hybrid (Model: ST1000LM014-1EJ164), Storage 2 x USB3 ext HDD MyBook 2TB (great) & MyBook 3TB (Don't buy this - it's encrypted/compressed drive - no longer readable without the original case)

  • by davidlea2000,

    davidlea2000 davidlea2000 Nov 20, 2014 8:36 AM in response to Helge Schwarz
    Level 1 (0 points)
    Nov 20, 2014 8:36 AM in response to Helge Schwarz

    This is a fix I have used:

    1. Boot Mac in target disk mode

    2. Connect to another Mac via Thunderbolt

    3. Navigate to /System/Library/Caches and delete the "Startup" cache folder on afflicted Mac

    4. Eject Mac HD in target disk mode and reboot the afflicted Mac

  • by Neilo,

    Neilo Neilo Jan 19, 2015 6:59 AM in response to davidlea2000
    Level 2 (150 points)
    Jan 19, 2015 6:59 AM in response to davidlea2000

    Many thanks David, I've had about 5 or 6 iMacs with this problem since upgrading my whole fleet to Yosemite. In most instances re-installing sys software worked, but 2 have failed to respond to that. Just tried your solution on one of those and bingo.

    I think this will be an on-going issue for me. I haven't noticed any posts from Apple on it, so thanks for the fix.

  • by francoisbernard,

    francoisbernard francoisbernard Apr 2, 2015 11:15 AM in response to kbhend
    Level 1 (0 points)
    iWork
    Apr 2, 2015 11:15 AM in response to kbhend

    Hello everyone !

     

    It's such a shame Apple hosts a platform to discuss bugs, but seems to never have a look at it…

    Anyways.

     

    Thank you all for your efforts ! Could someone explain step by step the procedure to put fsck back ?

    I tried the solution which starts with turning it off, but the solution didn't work. Before I move on to the next one, I wanted to be sure to start clean..

     

    I don't understand command lines, so if we first did a "mv" (mv /sbin/fsck /sbin/fsck.off) is it ok to start directly with a "cp" (cp /sbin/fsck.off /sbin/fsck) ?

    I'm gonna try the target mode solution, and let you know if it worked !

     

    Thank you for your help

  • by blk182n7,

    blk182n7 blk182n7 Jul 6, 2015 8:44 AM in response to That guy!
    Level 1 (0 points)
    Jul 6, 2015 8:44 AM in response to That guy!

    worked perfect  thank you. 

  • by alabin,

    alabin alabin Sep 15, 2016 5:10 AM in response to francoisbernard
    Level 1 (9 points)
    Mac OS X
    Sep 15, 2016 5:10 AM in response to francoisbernard

    boot into single-user mode

     

    #mount the main boot-volume

    /sbin/mount -uw /

     

    #remove the dummy fsck-binary

    rm /sbin/fsck

     

    #rename the backup-fsck-binary back to fsck

    root# mv /sbin/fsck.off /sbin/fsck

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