Can't use OSX, stuck at startup screen

I have last year's Macbook White, 2.13 Ghz, 160 GB, 2 GB RAM, and it has quite a problem. A few days ago, the Macbook was perfectly fine, but yesterday, when I turned it on, the chime would come, and the startup screen with the round 'loading' sign and the apple logo would come.However, that screen stays like that for a minute, then another, very similiar screen comes. The loading sign is still there, but where the apple logo was, now there is a 'no smoking' type round cross sign, which stays there. OS X doesnt boot up, the screen just stays like that forever. I CAN, however, use windows. Please give me some advice on what to do.

Archive and install OS X.

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I've ran Disk Utility, there were problems that were fixed, but it's fine now (I've ran it again to double check), and I've ran Apple HHardware Test and I received" no trouble found".
But everytime I try to start up it gets stuck on the grey startup screen with the apple and the oration under it. So I'm at a loss at this point.
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System files are missing or damaged so you need to reinstall OS X:
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Do the following:
1. Repair the Hard Drive and Permissions
Boot from your Snow Leopard 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 Utilities menu. 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.
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If the drive is OK then quit DU and return to the installer. Proceed with reinstalling OS X. Note that the Snow Leopard installer will not erase your drive or disturb your files. After installing a fresh copy of OS X the installer will move your Home folder, third-party applications, support items, and network preferences into the newly installed system.
Download and install the Combo Updater for the version you prefer from support.apple.com/downloads/.
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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.
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Welcome to the Apple discussions.
Usually you get a 'can't install on this disk' when you try to use a gray-faced system disk from another system, like MacBook or iMac or other non-Powerbook. Those disks are locked to the systems they are distributed with. The only way to upgrade to 10.5 is with a black-faced retail disk.
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Jamie,
Since your wife knows how to use the installer DVD for maintenance, ask her to do a "Repair disk" on the startup drive. (Repairing permissions is something else.) However, also ask her if by 'no effect' she means repairing permissions could not be done or reported no permissions problems with the drive. If the latter, it is good news in that it at least means Disk Utility found a valid system to check permissions on. Anyway, let us know the results of the repair disk step, particularly any messages about repairs that were attempted.
It is unfortunate that you don't have some files backed up but hopefully we can get your Mac back up to speed without losing anything. If they are highly critical files, you may want to consider waiting until they can be offloaded to another Mac using Target Disk Mode or similar techniques, since any write to the drive has some (if generally very small) chance of overwriting data.
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Hi,
I have a MacBook running Snow Lepard. Recently it would not pass the startup screen and stucks there forever.
I have tried used to boot off from CDs (both Snow Lepard and the OS before) and it did not boot from the CDs. This was not an issue before I upgraded to Snow Lepard and I can always repair the HD or reinstall the OS.
I also tried all the boot options and found out the only key it response is the "option" key and send me to a login screen but the password does not work.
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1. boot in safe mode. Didnt work, still stuck at grey screen
2. boot in safe mode with "commd-shift-v" to see info. stuck in "dos" looking screen. see pic at bottom.
3. tried resetting VRAM w/ "commd-opt-p-r". did not work, still stuck at grey screen.
4. got original OSX install DVD. Was able to boot to disc and make it to disk utilities. went to repair and got error "unable to unmount disk"
5. ran "repair permissions" and completed that. ran "verify disk" and got green "disk ok" message. then re-ran repair and got same "unable to unmount disk"
so know i am worried. my main concern is the 80 GB of music I have on this computer (and dont currently have backed-up {que back-up lectures}) and my pictures. Does it sound possible to recover music and pics based on this little bit of info? Im willing to take it to the Apple store and pay the price if it sounds like I can recover it. I am pretty computer savy but am reluctanct to just start trying anything that could lose my music/pics. I cant try just deleteing and restoring OSX to factory settings and losing all that music/pics.
so...what is best approach to access and back up these files myself? I do have another macbook with a firewire connection but am not familiar with that process. I will get a external HD immediatly (now ofcourse)...can I backup my files from disc utility?
Thanks for any help.

Sorry about specs...i entered in drop box menu but realize doesnt show on thread:
MacBook Pro "Core 2 Duo" 2.53 13" (SD/FW)
2.53 GHz Core 2 Duo (P8700)
Intro Date:
June 8, 2009
Disc Date:
April 13, 2010
Order No:
MB991LL/A
Model No:
A1278 (EMC 2326*)
Subfamily:
Mid-2009 13"
Model ID:
MacBookPro5,5
Std RAM:
4 GB
Std VRAM:
256 MB
Std Storage:
250 GB (5400 RPM)
Std Optical:
8X DL "SuperDrive"
I was running the last vesion of snow leopard (10.6.8 i think).
I picked up a firewire today and am going to attempt to make "broken" macbook target and pull files onto other macbook. Will give an update tomorrow after attempt. Thank you for fast response.

My Lenovo s10 is Stuck on Startup Screen

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Can't use OSX, stuck at startup screen

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