MBP won't boot. Gray screen, apple logo.

As above, my 2.4 Macbook Pro, won't boot past the gray Apple logo and that spinning circle.
Holding C doesn't allow it to boot from CD either, for Leopard/Tiger OR Disk Warrior!
Holding alt allows the start up menu, but then spits the CD out and only shows the Macintosh HD which obviously wont boot!
HELP!
MBP 2.4 / 10.5.2

Have you tried zapping the PRAM?
Here's how:
http://docs.info.apple.com/article.html?artnum=2238

Similar Messages

G4 Powerbook won't boot; grey screen Apple logo only

My G4 Powerbook 17" 1.33 stopped booting. I reinstalled OS 10.4.3 successfully, but on start up only get a grey screen with Apple logo with no spinning gear. I have reverified HDD with Disk Utility from the OS Install DVD, and it confirmed no problems. Any suggestions?

If you have the original OS X disks that came with the system, run the Apple hardware test. Find the disk that says 'AHT Version x.x' in small print on the label, insert it and reboot holding the alt/option key down. Choose the Apple hardware test, and when prompted choose the extended test. You want to see if it finds any hard drive access issues.

Macbook flickering screen & freeze, then won't boot pass the apple logo

Hi Guys,
My macbook is driving me insane now. Just recently, my macbook has occasionally flickering screen and freezes after that. Yesterday, when I was watching youtube on fullscreen, it first has flickering screen, then freezes. So I hard booted it pressing the power button. Then, when I try to restart it, it won't boot pass the apple logo no matter what.
Here's my macbook spec
2007 Summer Macbook Pro 15"
Snow Leopard 10.6 OS X
I cracked my screen once, and got a replacement, don't know if that matters.
I've tried the following:
Safe mood reboot, the progress bar goes about half, then disappears and stalls again.
Booted in verbose mode but it gives a warning message:
'com.apple.driver. internalmodemsupport declares no kernel dependencies; using com.apple.kernal.6.0'.
Booted in Single user mood, and typed fsck for disk repair. After checking said the volume Macintosh HD appears to be ok. But still won't boot pass the apple logo after restart.
Boot with installation disk pressing C at startup. Success after a few try:
Opened Disk Utility and did disk repair (no problem found).
Reinstalled Snow Leopard OS X 10.6.
This time it booted with Finder and everything for a short while, then the screen flicker and freezes again (before I can backup anything!). Then, I can't reboot pass the apple logo again.
When I try to reinstall Leopard OS X 10.5 with installation disk, the macbook seems to try to read the disk, but won't boot. I've got a CD stuck in the optical drive now.
I've tried everything I can find online short of opening it up and send it into the oven for baking! I pray it's not a hardware problem, coz I'm no good at that. (QAQ~~~) Please help me!
Thank you very, very, very much!!!
ps. this is my first post. please let me know if I have missed anything.

starangelam wrote:
When I try to reinstall Leopard OS X 10.5 with installation disk, the macbook seems to try to read the disk, but won't boot. I've got a CD stuck in the optical drive now.
Reboot the machine holding the trackpad or left wired mouse button down, that shoudl force eject the 10.5 disk.
Reinstalled Snow Leopard OS X 10.6.
This time it booted with Finder and everything for a short while, then the screen flicker and freezes again (before I can backup anything!). Then, I can't reboot pass the apple logo again.
Ok, so your attempting data recovery efforts.
First get the 10.5 disk out of the machine, like above.
You can also boot into Single User mode, (command s at reboot) and enter
/usr/bin/drutil eject
then type
restart
Next hold c boot and use the 10.6 disk and create a data recovery drive here on a blank external drive, make sure you clean and polish the bottom of the 10.6 disk, if it's bad you will need to get a new one.
Create a data recovery, undelete boot drive
If your problems continue on this drive even with a clean or new 10.6 disk, it's likely a hardware issue with your Mac, not a issue with the drive.
I suspect a failing sector on your internal boot drive, you installed OS X right over the same spot perhaps, as you were obviously able to boot from the 10.6 disk to install it so it seems the hardware of the Mac appears to be working.
You might have other issues relateing to software perhaps, something your installing or running.
Step by Step to fix your Mac
Once you have gotten your files off the internal drive, you may want to look into doing a Zero Erase with Disk Utility before resintalling 10.6 again fresh install method.
Reducing bad sectors effect on hard drives
How to erase and install Snow Leopard 10.6
Look into making a bootable clone, it's easier to restore with and more options than Timemachine
Most commonly used backup methods explained

Gray screen, apple logo and spinning gear hang at start up

after a lengthy round of "bejeweled", i let my imac fall into screen saver mode. when i tried to log back in, i tapped the mouse and the imac flashed as it does when actuated outside a dialogue without clicking the okay button, and immediately returned to screen saver. i then manually shut down and restarted to the gray screen, apple logo and spinning gear hang. i then inserted the leopard install dvd, manually shut down and restarted pressing the option key and selected the install disc. it booted as usual. i selected the language preferred, used the utility drop down menu and selected DU, then selected the hard drive and verify permissions to reveal a pop up "Error: The underlying task reported failure on exit. Permissions verification complete." i immediately selected repair disc, and breathed a sigh of relief with the notification "appears to be ok". then utilities/start up disc/macintosh hd/restart. still get the hang. i have repeated this process several times, also resetting the PRAM as well to the infinite hang. as a matter of fact, the gear has been spinning the entire time creating this post. needless to say, i am truly at a loss. SOS!!!!!!! Please!!!!! SEND LAWYERS, GUNS AND MONEY!!!!

i have perused some of the threads posted per this topic and decided to attempt an "archive and install." i also have a 620gig acomdata external drive with close to a carbon copy of my internal. a few short minutes into the install, the imac reveals a pop up stating it cannot install some files on the hard drive, contact the software manufacturer or restart and try to install again. the internal drive is a 160gig with only about 60gigs of room, so i tried to archive and install to the acomdata instead as it has 180 gig of free space. i get the exact same dialogue once again. restart and a third attempt only archive and install will not highlight, only first time and/or erase and install. further, start up disc shows only the install disc and network as choices. so i attempt first time install on both drives and get the same pop up message again. DU recognizes both drives although verify/repair permissions does not highlight, but not start up disc.
i'm trying not to become frantic, but my patience is threadbare. i am in desperate need of sound advice as to what i need to do.
thanks again in advance,
bradley

Start Up Issue-Gray Screen, Apple Logo And Cognition Wheel-Blue screen before start up at times but no longer starting up beyond gray screen and cognition wheel

Power button pressed.
Start up light okay
Chimes okay
Gray screen, apple logo and cognition wheel spinning and the loading bar underneath loading 1/10th of the way.
Loading bar doesnt load fully and then disappears.
Gray screen remains with apple logo and cognition wheel only.
No start up to desktop. Before start up to desk top which is not happening any more a blue screen appeared before the desktop appeared. When start up complete the ' Finder' had no responded and did not work' Multi coloured loading pointer continually turned. ' Network' could not be loaded in 'System Prefrences'.
Ive tried reading and following propts...Results NVRAM/PRAM - Logic board battery replacement. How much will this cost?
Hardware test - No problem found
Safe Boot - ' volume Machintosh HD could not be repaired.'
' Run time corruption detected on Machintosh HD device'
What do you suggest aside from taking it to a apple store?
Thanks Stephen

Lion or Snow Leopard? If Lion, boot into your Recovery partition (hold down the Command and R keys whilst booting) and use Disk Utility to verify and, if needed, repair the boot volume.
If Snow Leopard, use the installation disc and use Disk Utility in the same manner.
Clinton

After prompted to update 10.9.1, my MacBook Pro updates and went thru restart but failed...I tried to start my book and gray screen, Apple logo both on, chime sounded, then went to progress bar, less than half macbook shuts down...did few times, same!!

After prompted to update 10.9.1, my MacBook Pro updates and went thru restart but failed...I tried to start my book and gray screen, Apple logo both on, chime sounded, then went to progress bar, less than half macbook shuts down...did few times, same!!
Go to system repair, there is a prompt that cannot repair live etc....I don understand!!! Help, I need the book for work tomorrow!!

Thanks clintonfrombirmingham...
After clicking "repair disk" it says DISK UTILITY STOPPED REPAIRING MACINTOSH HD, DISK UTILITY CAN't REPAIR THIS DISK. BACK UO AS MANY OF YOUR FILES AS POSSIBLE, REFORMAT THE DISK, AND RESTORE YOUR BACKED -UP FILES....
written in red: ERROR: DISK UTILITY CAN'T REPAIR THIS DISK,,,DISK, AND RESTORE YOUR BACKED-UP FILES.
how can I back up when I cannot even start my macbook? I am stuck here and have lots of important files in the hd... Please help me? Thanks you!

G5 turns on but display stops at gray screen+apple logo

Can someone tell me why my G5 turns on but display stops at gray screen+apple logo. The keyboard and the superdrive not responding. After a minute the fans kick in and grow louder and faster...?? I tried a reset with the P and R but keyboard N/S. USB have power. I do get the start sound then the gray logo+screen.
Thanks for the help anyone!!
G5 dual 2G Mac OS X (10.3.9) 2G RAM, 23" display

I was getting a similar issue yesterday, stuck on the
grey screen, then the G5 turned into mini turbine
engine. I'm not sure what fixed it, i took out the
plastic wind deflector and noticed three leds next to
the RAM slots were lit up.. with some quick googling
bringing me back to apple's support pages, it turned
out the lights came up because the deflector shield
wasn't in place. Anyway myabe it was slightly out of
place, but that coupled with unplugging the power
cable for some moments seemed to help, and i was able
to get past the logo screen etc..
but i was still getting intermittent issues, with
startup and programs, and getting plenty of crashes.
So i did the Apple Hardware Test, and after 3hrs it
turned out my RAM was at fault. I recieved the
machine only a week back, since then i've added new
RAM, which was the exact same Samsung RAM that apple
use, though one stick didn't share the exact same
serial, it was still the same spec.. anyway i've
removed the pair of 1GB sticks for the time being,
and since doing so, i've got my mac running to its
full strength.. i just hope i can sort out this RAM
issue and not have blown my money.
Thanks for the help but I tried the cable thing etc and nothing so I reformated the disk (clean install and I'm back to normal now...so the RAMS were not the problem in my case.
Also, I'm glad I backed up all my stuff frequently therefore, no losses...
G5 dual 2G Mac OS X (10.3.9) 2G RAM, 23' display

Boot continues to fail - gray screen apple logo progress bar...

I have a mid-2012 MBP. I upgraded to Yosemite. Things were working well. Laptop wasn't used for a week - sleep mode was in use and battery drained. Upon boot-up, progress bar took longer than usual, and after 15 minutes or so it inched its way to the halfway point and finally got to my desktop. Sleep mode is great and I kept the battery charged and didn't let it drain. I needed to do a restart from some updates, but restarting took forever again. I booted off my usb3 yosemite installer and ran disk utility to repair permissions and repair disk. Both found problems and the repair to the disk said I needed to backup any files and start over.
So I got a smaller SSD and installed Yosemite on there, and did a migration to the new SSD. Everything seemed great and snappy for a few days, but once again, after using it in sleep mode for those few days, now it takes forever to start up. I rarely ever restart the Mac, it's awesome. But, the SSD was too small for all my iTunes backups and apps - so I got a 512GB SSD and decided to start over. Once again I installed 10.10 and migrated my data, this time from my time machine backup (few days old). It worked well for one day. ONE DAY. And then it wouldn't even boot. It was slow once, then the next time the stupid progress bar makes it 1/3rd of the way and just quits there. Disk utility finds no errors now, but it won't boot up.
The screen dims, the cursor appears, but the screen with the progress bar remains for about an hour until it brings up a screen full of text stating startup wasn't successful in a dozen languages and then it reboots. Over and over it goes.
When I boot off the usb install, the same progress happens, 1/3rd of the progress bar fills, screen dims, cursor appears, but eventually it turns into the spinning rainbow and the progress bar finishes. I never make it to the rainbow part.
I have reset PRAM as well... Tried different Apple certified RAM. Not sure what steps to do next, so I'm reinstalling Yosemite as I type this.
The 512GB SSD and the smaller SSD were both used in windows machines for at least 6 months prior to use in the Mac, so I'm positive they are good drives. Now I'm not sure if my original HD was even defective or not. Does anyone have any suggestions of things to try or what the problem might be? TIA.

If you can't start up and log in in the usual way, try in safe mode.
During startup, you’ll see a progress bar, and then the login screen, which appears even if you normally log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Log in as an administrator to carry out these instructions. If you have only one account, you are the administrator.
☞ If you don't see any reports listed, but you know there was a panic, you may have chosen Diagnostic and Usage Messages from the log list. Choose DIAGNOSTIC AND USAGE INFORMATION instead.
Safe mode is slower than normal, and some things won’t work at all.
Note: If FileVault is enabled in OS X 10.9 or earlier, or if a firmware password is set, or if the startup volume is a software RAID, you can’t start in safe mode.
If you're able to log in, launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Console in the icon grid.
In the Console window, select
DIAGNOSTIC AND USAGE INFORMATION ▹ System Diagnostic Reports
(not Diagnostic and Usage Messages) from the log list on the left. If you don't see that list, select
View ▹ Show Log List
from the menu bar.
There is a disclosure triangle to the left of the list item. If the triangle is pointing to the right, click it so that it points down. You'll see a list of reports. A panic report has a name that begins with "Kernel" and ends in ".panic". Select the most recent one. The contents of the report will appear on the right. Use copy and paste to post the entire contents—the text, not a screenshot.
I know the report is long, maybe several hundred lines. Please post all of it anyway.
In the interest of privacy, I suggest that, before posting, you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header of the report, if it’s present (it may not be.)
Please don’t post other kinds of diagnostic report.

Radeon 5770 in 2008 Mac Pro, won't boot - hangs at Apple logo screen??

Okay, so I had the Radeon 2600 XT and it kept giving me issues with pink & white checkerboards and freezing, then eventually wouldn't let me boot past the white/grey apple logo loading screen. Now, today I installed Apple Radeon 5770, just installed, got the MiniDisplay to DVI-D adapter and everything, but it STILL won't let me get past the white/grey apple screen! I can't seem to get the DVD drive to open either. Both of my hard drives have been working fine and I've even swapped slots and i still can't get past the white screen! What gives? I just dropped over $300 for this, so you can imagine my dismay and frustration. Can someone please help me with some ideas? Would be GREATLY appreciated.
It's a 2008 Mac Pro dual 2.8Ghz (3,1), running 10.5.8
M

Yeah, ok thanks for the response about the screen! So, I don't have 10.6.5. I'm running 10.5.8, which the Radeon 5770 says it needs 10.6.5, but -finally- I got my computer to boot up with the 5770 in it, on 10.5. Al I did was hold OPTION+ Power button and it took me to a blue screen, then to my 500 GB new HD. I then switched over to my other username on Macintosh HD (drive that came with the MacPro) and OSX loads fine! I can tell that it still needs to be on 10.6.5, so I can download the drivers because the text is ever so slightly fuzzy, and the color isn't tuned well (too much contrast) and images take a little longer to load/ are a bit laggy. I'm just glad it's up and running! No more pink transparent checkerboards, and loud *** fan sounds! I am wondering though, what was causing this hold up? Is it only booting up because I have the 10.5.2 install disc in the SuperDrive? I almost don't want to take it out and try without it, after the trouble i've had, just in case lol. I'd like to have an idea as to why, because I don't want to mask a problem, and have it eventually turn into a catastrophe.

MacBook won't boot past the apple logo screen!

So my MacBook started freezing up and I went to restart it and it wouldn't boot past the grey logo screen with the spinning gear. Its pretty old and therefor still has the Leopard operating system. I've been trying to run Disk Repair using a Snow Leopard install disc but it just gets about 30% done and then doesn't go any further. Eventually I stopped the disk repair and just tried installing OSX but when it asks me what drive I want to install on there are no options available to click. I've got alot of unsaved work on this old thing and would love to get it running soon! Any help would be extremely appreciated! Thanks

I've been trying to run Disk Repair using a Snow Leopard install disc
Install discs are "machine specific" .. you can only use the install disc that came with the Mac for repairing the hard disk.
You may not have enough free space on the startup disk.
Follow the directions for starting up in Safe Mode
A Safe Mode boot can take a little longer then a normal boot so be patient.
When you see the Desktop, right or control click the MacintoshHD icon. Click Get Info. In the Get Info window you will see Capacity and Available. Make sure there's a minimum of 15% free disk space.
If there isn't enough free space, help here > Freeing space on your Mac OS X startup disk
You can use Disk Utility to verify the startup disk from Safe Mode but you can't repair the disk. You will need the install disc that came with your MacBook for that. While you have Disk Utillity open check S.M.A.R.T. status at the bottom of the window. Make sure it says: Verified
When you are finished, click the Apple menu icon top left in the screen. From the drop down menu click Restart.
If you don't have the original install discs you may be able to request a replacement. You can get replacement System Install & Restore CD/DVDs from Apple's Customer Support - in the US, (800) 767-2775 - for a nominal S&H fee. You'll need to have the model and/or serial number of your Mac available.

MBP 13" Won't Boot, Gray Screen w/ ? Folder, Hard Drive is perfectly fine

I have a 13" Macbook Pro that won't boot up. When I used my install disk to get to disk utility, it did not recognize that there were any drives in the computer.
I tried:
Removing the hard drive and plugging it into another computer using a SATA to USB adapter. It worked fine and I could see all of the files on the hard drive. I ran the disk utility on another Mac to see if there were errors. It found none. I then restarted the other Mac and selected to boot from the USB drive and it booted perfectly fine. I tried reconnecting and seeing if it would boot now for some reason (machines are funny like that). It didn't; same problem.
Next, I tried:
Installing a different hard drive to see if the disk utility program would see it. It did not.
Then, I tried:
Connecting the original hard drive to the defective Mac using the SATA to USB adapter and trying to boot from USB. This worked fine.
Conclusions so far:
-The Hard Drive is 100% ok
-The Hard Drive Cable MAY be defective
-If the Hard Drive Cable is not at fault, there MAY be a problem with the logic board.
I was wondering if anyone has any further ideas for me before I try swapping out the hard drive/infrared cable?
Any thoughts would be appreciated. Thanks.

I have pretty much the same problem, although I don't get the question mark, I get the gray screen with a symbol like a "no entry" sign. In other words, circle with a slash through it. Very odd. Never seen that before. I booted from two different external drives and the computer boots fine. The internal drive mounts on my desktop and is accessible, nothing is wrong. I cloned the internal drive to one of the external drives and booted from that fine as well.
The disk has been repaired via Drive Genius. I rebuilt the directory through Drive Genius and it seems to run just fine.
It seems it may be as simple as a bad or loose cable, but since the icon is something I'd never seen I wanted to see if anyone knows what that icon might mean. The only new thing I did last week was defrag the drive through Drive Genius.
Oh also, I replaced the battery last year from OWC. The glue holding the silver outer plate has come off so that battery, though working fine, is a bit of a pain. Since the battery is lose inside that casing, I was wondering if maybe there is a strain internally. I don't know the wiring that's near the battery connection.
Thanks for any help

Problem with MBP won't startup just showin "apple logo"

Hello,
today I have turned off my MBP Retina 15" by pressing the power off while I pressed the update and it won't restart becuse the big applications I have played so I trun it off by Pressing the" power bottun "
Now It's show only Grey Screen and apple logo only
I can't see the log in screen
======
I am Using " recovery mode " by Pressing command + R and Donw arrow .
I have tride to fix it by using
Verify and Repair volume "Machintosh HD"
but not work
Help me

Try some troubleshooting before you start trying to move a bunch of stuff around.
Startup Gray Screen
Startup Issues - Resolve
Startup Issues - Resolve (2)
Startup Issues - Resolve (3)

Mac won't boot: stuck on apple logo and spinning wheel

My MacBook pro 13 inch(mid 2010) won't boot. It just gets stuck on the apple logo with the spinning wheel under it. I have done the following but they have not solved the issue:
Zap pram
Attempt to boot in safe mode
Try to access windows partition( resulted in flashing folder with question mark)
I am dying to try to insert the Mac os x install disc and use disk utility, but it is not going into the drive. This all started when I had to turn off my Mac because it had completely froze. Any help would be greatly appreciated, especially if there is a way to insert the install disk.
Thanks in advance for any assistance.

Try this:
Booting From An OS X Installer Disc
1. Insert OS X Installer Disc into the optical drive.
2. Restart the computer.
3. Immediately after the chime press and hold down the "C" key.
4. Release the key when the spinning gear below the dark gray Apple logo appears.
5. Wait for installer to finish loading.
If you have a problem with the above, then try:
1. Restart the computer.
2. Immediately after the chime press and hold down the "OPTION" key.
3. Wait for the boot manager screen to appear, then insert the installer disc into the optical drive.
4. Wait until the disc is recognized and appears in the boot manager screen.
5. After the disc appears select it then click on the downward pointing arrow button.
5. Wait for installer to finish loading.
If you are running Snow Leopard, then reinstall it. Your HDD will not be erased, and all your data will be preserved.
If you are running Leopard then do this:
How to Perform an Archive and Install
An Archive and Install will NOT erase your hard drive, but you must have sufficient free space for a second OS X installation which could be from 3-9 GBs depending upon the version of OS X and selected installation options. The free space requirement is over and above normal free space requirements which should be at least 6-10 GBs. Read all the linked references carefully before proceeding.
1. Be sure to use Disk Utility first to repair the disk before performing the Archive and Install.
Repairing the Hard Drive and Permissions
Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger, Leopard or Snow Leopard.) After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer. Now restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
2. Do not proceed with an Archive and Install if DU reports errors it cannot fix. In that case use Disk Warrior and/or TechTool Pro to repair the hard drive. If neither can repair the drive, then you will have to erase the drive and reinstall from scratch.
3. Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When you reach the screen to select a destination drive click once on the destination drive then click on the Option button. Select the Archive and Install option. You have an option to preserve users and network preferences. Only select this option if you are sure you have no corrupted files in your user accounts. Otherwise leave this option unchecked. Click on the OK button and continue with the OS X Installation.
4. Upon completion of the Archive and Install you will have a Previous System Folder in the root directory. You should retain the PSF until you are sure you do not need to manually transfer any items from the PSF to your newly installed system.
5. After moving any items you want to keep from the PSF you should delete it. You can back it up if you prefer, but you must delete it from the hard drive.
6. You can now download a Combo Updater directly from Apple's download site to update your new system to the desired version as well as install any security or other updates. You can also do this using Software Update.

Macbook stuck on gray screen, apple logo, and loading symbol?

I just purchased my Mac a couple of days ago. Working fine for awhile, but now it "chimes", goes to a gray screen with the apple logo and the loading sign. It is stuck there and I am not sure how to proceed. Thanks for any help.

Disk Utility can repair the disk this way:
-Search your installation DVD's.
-Insert the disc 1 and sthut down your Mac
-Start your Mac again while holding down the C key
-Now your Mac should boot from the CD, this can take some time.
-After a while you will see a installation screen where you can chose a language.
-Chose English and continue.
-Then click some time's next and agree with the "Software Agreement".
-Open Disk Utility. Top menu bar --> Utilities --> Open Disk Utility.
-Select your hard disk in the list of disks and volumes on the left side
-Go to the First Aid (tab somewhere on the right).
-Click the button to verify the permissions.
-Then Click the button to repair the permissions.
-Click the button to verify the disk.
-Then Click the button to repair the disk.
-Exit the Disk Utility and the installer.
-Restart your Mac

Won't boot past the Apple logo...

I have an '07 MacBook that was upgraded to Snow Leopard about 6 months ago. I've had it for about 3.5 years with no problems-- until now. Last night I turned it on and it booted fine. However, once it had booted, the spinning pinwheel would not go away when I was on "Finder". Despite this, Firefox loaded up fine. But I didn't want to do stuff on the computer when I knew something wasn't right. I tried to restart it, but it wouldn't shut down, so I was forced to cut it off with the power button. When i tried to turn it back on, it wouldn't get passed the white screen with the Apple logo and the little spinning load signal. Along with that, a load bar that I have never seen on that page before began to load up, but it disappeared after filling up to about 10%. I let it sit for a while before turning it off and trying again. By this point I was freaking out, because I have some valuable documents/files that I haven't backed up yet that I really need. I got on my sister's computer and began to research all the topics where people had the same problem. I did everything. I tried the verbose mode, but everything seemed to be okay. In verbose, I did the fsck -fy and reboot, but it still wouldn't start. I did the PRAM and SMC resets. I tried to open it in Safe Mode, but I couldn't get it to open. This morning, I got out my Snow Leopard disc and was able to boot that up. Unfortunately, I, stupidly, have not used time machine to back anything up like I should. I don't want to just wipe and restart everything because there are some files I really need to get. I'm trying disc utility. When I verify the disc, it says that the Sibling Link is invalid and it can't repair that. It tells me to back up as much as I can and then to wipe it and start over, but I don't know how to back stuff up from here. I've also tried "Permission Verify". It comes up with all this things that say either "Group differs on..." or "Permissions differ on..." and then it goes on with a long line of text starting with "Applications/Utilities/....etc. etc." and they all end with either "should be 0, group is 80(or 90)" or "should be -rw-r--r--, they are "-rw-rw-r--". But before it finishes verifying them, it stops loading with about a minute left and pretty much just freezes other than the mouse being moveable.
I'm out of town right now, but I'm probably just going to take it in to the local Mac store when I get home since there's not one around here. Of course, if this is something that I can fix, I'd prefer just to do that. Someone please put me out of my misery and tell me that my files are recoverable. When I'm in disc utility, it says I have the exact capacity I had when my computer was booting, so that gives me hope that all of my files are still there, not to mention the fact that I could see them in another program under "Utilities". Unfortunately though, I'm not computer-savy enough to know what to do. Sorry for all this writing, but hopefully this way all you tech-wizards' questions will be answered so that you know how best to help me.

Yes, I'm using my snow leopard DVD. I wrote all of this in my first post. I tried to boot safe mode from Terminal by doing the "sudo nvram boot-args="-x"" thing. Also in my first post, I said that i used Disc Utility and that it told me the Sibling link was missing or was wrong. Read my first post and you'll see everything that I've tried.
Also, an update on something, now when I upload in Verbose mode, it tells me the bugs; it didn't do that before.

MBP won't boot. Gray screen, apple logo.

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