JMPC
Level 1 (25 points)
Mac OS X

Q: Can't start Disc Diagnostics

Hello.

 

I'm on a MacBook Air - 2014 model, with OS X Yosemite 10.10.1 installed.

 

I'm trying to access Disc Diagnostics (no particular reason, just want to!). I've used it several times before on my Mac... BUT, when it starts, it tries to access my internet wi-fi connection. It does, apparently. BUT, below the name of my Wi-Fi, it doesn't appear any button that allows me to proceed!

 

1. I press 'D' key on my Mac;

2. The 'planet Earth' appears on my screen.

3. My internet connection shows on screen (meaning, my modem's name shows on screen!).

 

Nothing else happens. There's no 'cancel' button or 'confirm' button on the screen...

 

What could be happening?

I already used Disc Utility to check if there's something wrong on my SDD. Apparently, everything's ok.

 

Is there any other way of accessing Apple Disc Diagnostics?!

 

Thank you for any information you might provide me.

All the best.

MacBook Air, OS X Yosemite (10.10.1)

Posted on Jan 22, 2015 4:52 AM

Close
JMPC

Q: Can't start Disc Diagnostics

  • All replies
  • Helpful answers

  • by CellarDwellr,

    CellarDwellr CellarDwellr Jan 22, 2015 4:56 AM in response to JMPC
    Level 4 (1,212 points)
    Jan 22, 2015 4:56 AM in response to JMPC

    Hello!

     

    Apple Diagnostics is install on your SSD. If for whatever reason the system cannot load it from the SSD, it will download Apple Diagnostics from the internet instead. That's why you see the globe.

     

    Why it doesn't boot beyond that could be one of these two things:

    - Perform a PRAM reset on your Mac and see if that solves it - OS X Yosemite: Reset your computer’s PRAM

    - Make sure your Wi-Fi network is up to snuff, preferably using "WPA2/WPA2 (personal)" encryption. If you have access to another wi-fi network, try connecting to that.

  • by OGELTHORPE,

    OGELTHORPE OGELTHORPE Jan 22, 2015 5:16 AM in response to JMPC
    Level 9 (52,776 points)
    Mac OS X
    Jan 22, 2015 5:16 AM in response to JMPC

    Are you holding down the D key long enough?  Review these instructions:

     

    http://support.apple.com/en-us/HT202731

     

    Ciao.

  • by JMPC,

    JMPC JMPC Jan 22, 2015 5:28 AM in response to OGELTHORPE
    Level 1 (25 points)
    Mac OS X
    Jan 22, 2015 5:28 AM in response to OGELTHORPE

    Thank you.

     

    Yes, I press the 'D' key on enough!

    I can initiate Disc Diagnostics till the moment when it's asks for my Wi-Fi connection & password.

    After that, nothing else happens.

  • by JMPC,

    JMPC JMPC Jan 22, 2015 5:29 AM in response to CellarDwellr
    Level 1 (25 points)
    Mac OS X
    Jan 22, 2015 5:29 AM in response to CellarDwellr

    Thank you.

    Everything you suggested was done.

    Still, Disc Diagnostics asks for my Wi-Fi connection & password.

    After that, nothing else happens.

  • by CellarDwellr,

    CellarDwellr CellarDwellr Jan 22, 2015 6:52 AM in response to JMPC
    Level 4 (1,212 points)
    Jan 22, 2015 6:52 AM in response to JMPC

    JMPC wrote:

     

    Thank you.

    Everything you suggested was done.

    Still, Disc Diagnostics asks for my Wi-Fi connection & password.

    After that, nothing else happens.

     

    Thanks for that. Please unplug your modems, routers, etc from power for about 1 minute. Plug everything back in, and try again

     

    Additionally, you can try and check the drive and it's partitions using a text command in the Single User Mode. This is easier than it might sound. Make a back-up before you start in case disaster strikes.

     

    Here’s how:

     

    1/ Make sure your computer is completely shut down.

     

    2/ You’ll have to be quick next: Press the Mac’s power button. As soon as you either hear the loud chime, or see the display light up - usually after a second or 2 - on your keyboard press [cmd] + [s] Keep these keys on your keyboard pressed until you see a very old-fashioned looking black screen with white text scrolling. At the bottom you will see something akin to “root #”

    Type the line below after the # and press return:

     

    /sbin/fsck -fy

     

    Your Mac will now check your drive for errors and if it finds any it will attempt to automatically repair them. Once it displays “root #” again it has finished. Read back what the results were. If it says “repair successful” or something to that effect, type after the #:

     

    reboot

     

    and press return. Your computer will restart now. Please let us know if this solved your issue, or if the steps above did not work, or could not be performed for some reason.

  • by JMPC,

    JMPC JMPC Jan 22, 2015 7:24 AM in response to CellarDwellr
    Level 1 (25 points)
    Mac OS X
    Jan 22, 2015 7:24 AM in response to CellarDwellr

    Thanks again.

     

    Ok. I did everything you suggested... it was a rather quick process.

    After all that, I got a message saying that everything was ok with my SSD.

    Apparently no problem was found.

     

    Also, I did 'reboot' my modem.

    The same keeps happening....

     

    If I try to use Disc Diagnostics just by pressing 'D' or if I try to use it from a bootable SSD I made when OS X Yosemite was available for the first time, and press 'D', the same thing happens... Ironically, this only started happening after I updated to OS X 10.10.1. ... (I updated weeks ago, of course...).IMG_2545.JPG

     

    There should be a 'cancel' cross and a 'confirm' symbol there, should it? :-?

     

    Once again thank you for helping me.

    Kind regards.

  • by JMPC,

    JMPC JMPC Feb 9, 2015 12:03 PM in response to JMPC
    Level 1 (25 points)
    Mac OS X
    Feb 9, 2015 12:03 PM in response to JMPC

    People, I would like to inform that - for some reason - reseting my wi-fi connection (actually disconnecting the modem and reconnecting it) solved my problem. Thank you all for the information you provided me. All the best to you.