MacBook Pro doesn't want to start up anymore.

My MacBook Pro doesn't want to start up anymore.
When I turn it on, it turns on, followed by a white/light grey screen with apple logo. After a while a loading wheel appears beneath the logo and a loading bar beneath it. The loading bar loads to about 1/5 and then disappears, leaving the computer stuck on the the white screen with the apple logo and the loading wheel.
I tried to reset the PRAM, but it didn't help, it only got the startup sound to play when I turn the MacBook on.
What can I do about this? Hopefully I don't need to lose my files.
Thanks in advance,
Emil

lonelyplanet wrote:
Seems like I have to use my Time Machine backup drive to reinstall the OS.
No you don't.
OS X can be reinstalled all by itself leaving the programs and files alone, provided the drive is working correctly.
I'm not quite sure how to recover the files from Macintosh HD that I don't want to be deleted during this process.
The TM drive is almost useless because you can't boot from it to recover your latest files with.
That's why I gave the link  for the undelete boot drive, you create and boot from that, access your internal drive and grab files, then you can restore from TM or other things, like the repair list of fixes I gave you.
Could you help me a little on how to backup files manually most easily?
The problem is your machine isn't booting to grab the files.
So you need to create a external boot drive, then you can access the internal boot drive directly and grab files out of your Music, Pictures, Movies, Documents folders (etc) to the external boot drive.
Most commonly used backup methods
Or is there a way to do this without deleting all of the files in my user folders on Macintosh HD?
Yes, you can choose to create a
Create a data recovery, undelete boot drive
and recover your filesnow , or you can chose to try fixing the machine without recovering your files, but your taking your chances as we don't know how seriously wrong it is yet.
If your willing to take a risk then proceed through this list, Step 1 - 8 etc., until the machine boots up.
Step by Step to fix your Mac
If the machine doesn't boot up then you need to create the external boot drive to get the files before proceeding with further steps.
If this is too much for you, then call a local PC/Mac data recovery/repair service and they will handle it for a large fee.

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  • My MacBook Pro doesn't want to open with my password or guess

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    Take each of these steps that you haven't already tried. Stop when the problem is resolved.
    Step 1
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    b. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, boot the non-working Mac in target disk mode. Use the working Mac to copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
    c. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.
    Step 2
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    Step 3
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    If you've booted from an external storage device, make sure that your internal boot volume is selected in the Startup Disk pane of System Preferences.
    Step 4
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    Safe mode is much slower to boot and run than normal, and some things won’t work at all, including wireless networking on certain Macs.
    The login screen appears even if you usually 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.
    When you boot in safe mode, it's normal to see a dark gray progress bar on a light gray background. If the progress bar gets stuck for more than a few minutes, or if the system shuts down automatically while the progress bar is displayed, your boot volume is corrupt and the drive is probably malfunctioning. In that case, go to Step 5.
    If you can boot and log in now, empty the Trash, and then open the Finder Info window on your boot volume ("Macintosh HD," unless you gave it a different name.) Check that you have at least 9 GB of available space, as shown in the window. If you don't, copy as many files as necessary to another volume (not another folder on the same volume) and delete the originals. Deletion isn't complete until you empty the Trash again. Do this until the available space is more than 9 GB. Then reboot as usual (i.e., not in safe mode.)
    If the boot process hangs again, the problem is likely caused by a third-party system modification that you installed. Post for further instructions.
    Step 5
    Launch Disk Utility in Recovery mode (see Step 1.) Select your startup volume, then run Repair Disk. If any problems are found, repeat until clear. If Disk Utility reports that the volume can't be repaired, the drive has malfunctioned and should be replaced. You might choose to tolerate one such malfunction in the life of the drive. In that case, erase the volume and restore from a backup. If the same thing ever happens again, replace the drive immediately.
    This is one of the rare situations in which you should also run Repair Permissions, ignoring the false warnings it may produce. Look for the line "Permissions repair complete" at the end of the output. Then reboot as usual.
    Step 6
    Reinstall the OS. If your Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.
    Step 7
    Repeat Step 6, but this time erase the boot volume in Disk Utility before installing. The system should automatically reboot into the Setup Assistant. Follow the prompts to transfer your data from a Time Machine or other backup.
    Step 8
    This step applies only to older Macs (not current models) that have a logic-board ("PRAM") battery. Both desktop and portable Macs used to have such a battery. The logic-board battery is separate from the main battery of a portable. A dead logic-board battery can cause a boot failure. Typically the boot failure will be preceded by loss of the startup disk and system clock settings. See the user manual for replacement instructions. You may have to take the machine to a service provider to have the battery replaced.
    Step 9
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    Cage
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