Hello and thank you for asking your question, with JustAnswer.com/Mac. I am Sr. Mac Tech Support Specialist, Terry, glad to assist you.
That is ok, I will be glad to help yoi
what you are experiencing is an issue with your iMac not seeing the bootable Mac OS X volume on your hard drive
that means it cannot boot up to Mac OS X
it fortunately does not mean there is anything wrong with your hard drive
so here as some steps I would like you to try:
Here are some steps you can try to resolve the issue:
• First, hold in your power button for approximately 10 seconds to do a hard shutdown.
• Once your Mac is shutdown, you will need to perform what is called a PRAM reset (Parameter RAM)
• Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously .
• Turn on the computer.
• Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
• Now, hold the keys down until the computer restarts and you hear the startup sound for the third time.
• Release the keys and allow the Mac to start up.
• Please update me to let me know if this works.
Ok tell me if you would - what version of Mac OS X are you using?
Sorry, there are going to be some delays - as I will be typing out instructions and sometimes that will cause some slight delay
One more quick question
do you have the installation disc for Snow Leopard available by chance?
that is very valuable if you do- in regard to this process
I am just entertaining all options
ok then we go to the next process
Here is a simple procedure that I recommend you try:
The System Management Controller is an integrated circuit (computer chip) that is usually on the logic board of your Mac computer.
It is responsible for power management of the computer. It controls backlighting, hard disk spin down, sleep and wake, some charging aspects, and some input/output as it relates to the computer sleeping.
• Shut down the computer.
• Unplug the computer's power cord.
• Press and hold the power button for 20 seconds.
• Release the power button.
• Attach the computers power cable.
• Press the power button to turn on the computer
I will be watching closely so please keep me posted
Sorry for the challenges you are having with your iMac
what I want you to do is repeat the process above
but this time, keep the power cord out for 3 minutes
in the last 20 seconds of that 3 minute duration, then proceed to press the power button for that last 20 secondas
as this will resume the iMac SMC reset once more, but with a longer power disconnect with the power cord
I want to see if this helps
not giving up yet
try this procedure for me now
- USING FSCK COMMAND TO VERIFY AND REPAIR DISK-
Start up your computer in Single-User Mode to reach the command line by doing this:
•Make sure your Mac is shutdown.
• Reboot your Mac
• When Mac starts up, press the Apple Command key+ S Key
- A black screen, with white text appears
• Press Return.
• At the command-line prompt, type /sbin/fsck -fy
--fsck will run through a series of tests and will return information about your disk's use and fragmentation. When completed, it will display this message if no issue is found:
The volume (name_of_volume) appears to be OK
If fsck found issues and has altered, repaired, or fixed anything, it will display this message: --FILE SYSTEM WAS MODIFIED--
Important: If this message appears, repeat the fsck command you typed at the beginning, until
Ok one moment- let me check into this for you
How long have you had your iMac if I may ask and is it a 21.5" or 27" model?
Ok that is what I was wondering
when you left out of town, did you keep your iMac turned on?
are you still with me?
I am trying to not even think like that
I want to keep trying if you don't mind
and you don't have the Mac OS X install disc for your Snow Leopard 10.6?
that is was hoping you were going to tell me that :)
Try this Safe Mode process -
let me know how this turns out
**Please note: An "Answer" by me, or an"Accept" from you, does not mean the session has ended. So please remain patient with me and I will work
diligently, to resolve your technical question to your satisfaction.-Thanks!*
I am going to have you take your Mac into Safe Mode to see if we can't remove a possible folder(s) that may be affecting your Mac's start up function.
Try these steps:
-SAFE BOOT MODE-
• Upon restarting your Mac, press the Shift key.
• Hold the Shift key until you see a White Screen with Gray Apple icon and eventually a spinning gear.
• When you see the Spinning gear, release the Shift key.
allow the Mac to boot up to the Safe mode environment
let me know if you get there
sorry for the first part
these are some older instructions but still very useful in cases like this
we got disconnected
I just came back online
sorry about that
Ok so we have tried numerous processes from Safe mode, to SMC and PRAM resets and still no boot up
I just checked one of my Mac tech resources on this issue with iMacs
from the iMac 21.5"s to the iMac 27" models affected by the white screen
and it is an issue where the hardware firmware (i.e. Software for the hardware within your iMac) is not loading up
that is why you cannot even get past to where you see the normal gray Apple menu screen when booting up
there is something wrong with one of the hardware components within your Mac that is preventing it from starting
Apple even notes if you experience this and the PRAM and even lower level SMC resets don't work
bring it in :(
when Apple speaks we have no choice but to listen
I wish that were different
because I believe it would still get some good visibility from the surrounding areas!
this is Apple for crying out loud
You too and thank you for being so diligent and allowing me to help you as far as I could
And one more thing
I don't want you to go in with too much dread
this could be a simple fix
it is just we are limited obviously from what we can do from here
sometimes the issue may simply be a RAM or video issue