How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Mike Your Own Question
Mike, Mac Medic
Category: Mac
Satisfied Customers: 8997
Experience:  Over 20 years IT experience with Apple computers in publishing, marketing and design.
Type Your Mac Question Here...
Mike is online now
A new question is answered every 9 seconds

Hello Mike, i have a strange problem with my imac where the

This answer was rated:

Hello Mike, i have a strange problem with my imac where the screen becomes white on boot up... i have the little turning wheel that appear and dissapear but nothing else won't happen...
Holld the power button for about 10 seconds. Then start it up and hold the Shift key until you see the Apple Logo. Let it try to repair and if it starts up ok restart the normal way then let me know
Customer: replied 4 years ago.

Hello Mike, i saw the progress bar go all the way. Then, it still won't load... i tried to restart it, and now, i have a grey screen with the wheel turning that appear and dissaear... same problem, but on a grey screen...

Do you know what system version you were running?
Customer: replied 4 years ago.


Restart the computer while holding the Command and R keys to boot to Recovery HD partition, when it boots select the Disk Utility and Continue. Then select Macintosh HD on the left and first Verify Disk on the right and if that is OK Repair Permissions. If Verify Disk is not OK try to Repair Disk.
Customer: replied 4 years ago.

yes, i did this already with apple support. I had some problems with my disk but those were already there before.... i called apple about those a month ago and the apple guy told me it wasn't anything serious.


invalid directory item count... should be 31908 of 31909




The volume Macintosh HD was found corrupt and needs to be repaired.



Then i click repair and get :


the volume Macintosh HD was repaired sucessfully


( but this was like that a month ago... i called cause i couldn't sync my keyboard after changing the batteries at that time)


today, i downloaded logonkey, when the application was done installing they asked me to restart the computer and i have this problem...

OK but did you just do that now? It musy be done on a regualar basis. Did it need repairs just now? What logon key? From where?
Customer: replied 4 years ago.

yes, i just did this now! it says the volume was repaired in green color...


The error in red was :


Checking catalog hierarchy

invalid item count

( it should be 31908 instead of 31909 )


but it's been repaired sucessfuly

Ok then there was a problem. Did you Repair Permissions too?
Customer: replied 4 years ago.

yes, before the verify and repair, i did permissions and repair permission it was ok as well


Ok you should Repair Permissions AFTER your Repaired the disk but anyway... is the problem still there?
Customer: replied 4 years ago.

i don't now.... i'm repairing the permissions now...


All the errors in permission seam to come from itunes...





I will wait to repair the persmissions and will try to restart... i'll get back to you

Customer: replied 4 years ago.

So Mike, i got a : permissions repair complete...


I restarted


got the apple in the middle of the screen, and the little whell at the bottom spinning... the spinning wheel dissapear and boom white screen again white the little wheel that appear and dissapear... bummer.Frown

Ok in that case I suggest you reinstall the system:

Do the same thing again but this time instead of Disk Utility click on Reinstall Mac OS X.
Customer: replied 4 years ago.

but i don't want to lose all my data ?

Do you have a Time Machine backup?
Customer: replied 4 years ago.

very old back up... 6 months ago maybe....

OK at least you have that but you should have Time Machine on all the time. Reinstalling the system will not normally cause you to lose anything. It just installs a clean system on top of the old one.
Customer: replied 4 years ago.

mike, it tell me :



OK try this:

Resetting the SMC & PRAM for Mac Pro, Intel-based iMac, Intel-based Mac mini, or Intel-based Xserve
1. Shut down the computer.
2. Unplug the computer's power cord.
3. Wait fifteen seconds.
4. Attach the computer's power cord.
5. Wait five seconds, then press the power button to turn on the computer.
6. Press and hold the Command-Option-P-R keys before the gray screen appears.
7. Hold the keys down until the computer restarts.
8. Release the keys and hold Command - R try reinstalling again

Customer: replied 4 years ago.

Thanks Mike. it's too late, i was able to start the installation... it tell me 8 hours 10 minutes remaining at this time...


But what you told me about the reset for the pram i did already earlier i found this on youtube and it didn't work either....



OK it should not take that long but let me know after. GOOD LUCK.
Customer: replied 4 years ago.

Hello Mike, this morning i arrived at the office and it was back to normal so the installation was sucessfull and all my data is still there ! thanks a lot !

Mike and 3 other Mac Specialists are ready to help you