computer crash

That means when my computer keeps stop?  Sometimes when I restart, a folder with an exclamation mark appears.  There is an error report generated with a bunch of wires and:

UUID: 4618BC32-6017-7CB9-0FA9-981

Question (?) Mark, record of flashing or a gray screen at startup

It's related, but not identical questions. Their causes are described in based on Intel Mac-Startup sequence and error codes, symbols. Solutions will be found in:

A globe or a flashing question mark appears when you start your Mac

Mac OS X - grey appears during startup

In most cases problems can be caused by one or more of these:

a. problem with the computer's PRAM - see reset the PRAM and NVRAM on your Mac.

b. boot, directory of the drive has been corrupted - repair with disk utility.

c. critical system files are corrupted or deleted - reinstall OS X.

d. the hard drive is physically non-functional - replace the hard drive.

Please note that the information I have provided is what Apple recommends, if other users will suggest different solutions found here, then be sure to what they recommend has no effect on your warranty, if any, or the ability to obtain the continuous service Apple

Please do not start remove disks or change cables unless you know what you're doing and have exhausted other alternatives non-invasive described here. If you perform all knit yourself which is not approved by Apple, then you will void any warranty you can have and lose any other Apple support.

Fix the hard disk and permissions

Boot from your Snow Leopard installation disc. After the installer loads, choose your language and click on the button continue. When the menu bar appears select utility drive in the Utilities menu. After that the charges of THE select your entry from hard drive (mfgr. ID and car size) in the list on the left.  In the 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 faulty or has failed. (State SMART is not reported on external drives Firewire or USB). If the drive is "verified", then select your OS X volume in the list on the left (subentries under the entry for the road), click the first aid tab, then click the repair disk button. If THE reports any errors that have been corrected, and then run repair disk again until no errors are reported. If no errors are reported, click repair permissions. Wait until the operation is complete, then exit FROM and return to the installer.

If THE reports errors, it cannot be resolved, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you do not have one of them or none of them can fix the disc, then you will need to reformat the hard drive and reinstall the OS X.

The main difference if you use Lion or Mountain Lion, you must first boot from the boot Recovery HD simply HD recovery to perform the foregoing.

Reinstall Snow Leopard without erasing the drive

1 fix the hard disk and permissions

Boot from your Snow Leopard installation disc. After the installer loads, choose your language and click on the button continue. When the menu bar appears select utility drive in the Utilities menu. After that the charges of THE select your entry from hard drive (mfgr. ID and car size) in the list on the left.  In the 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 faulty or has failed. (State SMART is not reported on external drives Firewire or USB). If the drive is "verified", then select your OS X volume in the list on the left (subentries under the entry for the road), click the first aid tab, then click the repair disk button. If THE reports any errors that have been corrected, and then run repair disk again until no errors are reported. If no errors are reported, click repair permissions. Wait until the operation is complete, then exit FROM and return to the installer.

If THE reports errors, it cannot be resolved, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you do not have one of them or none of them can fix the disc, then you will need to reformat the hard drive and reinstall the OS X.

2 reinstall Snow Leopard

If the disc is OK then leave FROM and return to the installer.  Proceed to reinstall OS X.  Note that the Snow Leopard installer will not erase your drive or disturb your files.  After installing a new copy of Mac OS X, the installer will move your Home folder, third-party applications, elements of support and network preferences in the newly installed system.

Download and install Mac OS X 10.6.8 v1.1 updated Combo.

3 reinstall Lion or later without erasing the drive

Restart the computer. After that the chime hold down the command and R until the Utility Menu appears. Select the disk utility from the utility Menu. What disk utility loads select the disk out-bumpy entry (usually, mfgr. ID and Player size) of the list to one side.  In the disk utility 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 disc is defective or has failed. (S.M.A.R.T. status is not reported on external drives Firewire or USB). If the disc is "verified", then select your OS X volume from the list on the side (entry indented under the entry for the drive, usually Macintosh HD.) Click the first aid tab, and then click the repair disk button. If disk utility reports any errors that have been corrected, then again run repair disc until no errors are reported. If no errors are reported, click repair permissions . When the process terminates quit disk utility.

Select reinstall OS X and click on the Continue button.

Note: You will need an active Internet connection. I suggest to use Ethernet if possible because it's three times faster than wireless.

Tags: Notebooks

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