I have mac pro...can not turn on my laptop

HELLO
I HAVE MAC PRO...IT WAS HANGING SO I TRIED TO TURN OFF MANUALLY.
BUT MY LAPTOP DID NOT TURN ON...IT IS DISPLAYING GRAY SCREEN AND FOLDER WITH QUESTION MARK...
I DON'T KNOW EXACTLY WHAT HAPPEN...
I AM GUESING THAT MAYBE HARD DRIVE GOT DAMAGE OR OS HAS SOME PROBLEM:
PLEASE HELP ME TO SOLVE THIS PROBLEM
THANK YOU

A flashing question mark appears when you start your Mac

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16 mo young Mac Pro will not turn on. Dead. Why. No problems ever! Installed Yosemite and did not boot up after. Did that kill it? To young to die. What

16 mo young Mac Pro will not turn on. Dead. Why. No problems ever! Installed Yosemite and did not boot up after. Did that kill it? To young to die. What happened?what do I do now??????? Help!

Note that you don't have a Mac Pro as stated. Your profile says you have a MacBook Pro. Please clarify as they are entirely different computers. If nothing below works for you, then make a Genius Appointment and take it in for service.
Try these in order testing your system after each to see if it's back to normal:
1. a. Resetting your Mac's PRAM and NVRAM
    b. Intel-based Macs: Resetting the System Management Controller (SMC)
2. Restart the computer in Safe Mode, then restart again, normally. If this doesn't help, then:
     Boot to the Recovery HD: Restart the computer and after the chime press and hold down the
     COMMAND and R keys until the Utilities menu screen appears. Alternatively, restart the
     computer and after the chime press and hold down the OPTION key until the boot manager
     screen appears. Select the Recovery HD and click on the downward pointing arrow button.
3. Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the Utilities menu. Repair the Hard Drive and Permissions as follows.
When the recovery menu appears select Disk Utility. 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 main menu. Select Restart from the Apple menu.
4. Reinstall Yosemite: Reboot from the Recovery HD. Select Reinstall OS X from the Utilities menu, and click on the Continue button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.

Can not turn on my laptop?

i dun no what is wrong with my laptop it does not start?
after sudden black out i could not turn on my laptop...
what should i do?
please help me...

once press start button....
my laptop starts and display grary screen showed my loading process...but after few seconds that loading pattern gone and....do nothing....
any guess...what is wrong?
any damage with hard drive...

My Mac Pro can not start up

Hi everybody,
I am using Macbook pro, Processor 2.5 Ghz intel core i5, memory 4gb 1600 Mhz DDR3 and OS X version 10.9.1. The last time when i turned off, it still worked normally, but now when i start up my Mac, it didn't work as it just appeared the grey screen with apple and a loading symbol. I wait for about 15 minutes and even 30 minutes but it still can not enter to the main screen. I don't know what's happen with my Mac.
Beside, i feel the OS X version 10.9.1 make my MAC slow down and even be unstability , i don't know why and how to solve it. Thus, Would you please help me to solve my problem?
Thanks in advanced.

Hello Khanpnl199,
Thanks for using Apple Support Communities.
For more information on this, take a look at:
Mac OS X: Gray screen appears during startup
http://support.apple.com/kb/ts2570
Best of luck,
Mario

Water spilt on Mac Pro will not turn on

A Glass of ice water spilt in key board. Turned off to let dry and then would not turn on again.. What can be done to salvage mac ?

So Betsy,
Here's my standard blurb about a spill:
Whenever a liquid spill occurs the first thing that has to happen is the laptop should be shut down immediately. All power must be removed as soon as possible. It is especially important that the battery be disconnected and removed.
All affected parts must be removed from the laptop and carefully and closely inspected. Any involved area should be marked for special treatment.
No attempt should be made to start/restart the computer since this could potentially damage the logic board beyond all repair.
Then all affected parts would be washed in deionized water and blown dry with compressed air. (In a water spill the deionized water is probably not as critical. Depends on the mineral content of the water.).
This is especially true of the large chips on the logic board. Liquid can wick under them and cause havoc for weeks if not months and years after the incident.
The logic board should be placed in a drying/dehumidifing oven for at least two days. Longer depending on the spill.The keyboard is a separate matter."
Now Apple won't do this for you and yes your warranty if you had one is probably void.

I have forgot my logon password and i have no hint can not get into my laptop.

hello everyone
I have forgotten my logon password and stupid me did not make a hint and now I can not access my macbook air. I went and tried other ways command r and still since i am new to mac never made a back up again stupid me. I then tried to re install the OS and it tell me that it does not see the start up OS system.
I need my mac since this is the only form of entertainment on my ship in which i work on and am leaving this week. PLEASE someone help me.....
Thanks
Robin.

There are different ways to reset the password depending on the Mac OS X version you are running. You can check it in  > About this Mac.
If it's 10.6 or older, see "Resetting your original administrator account password" > http://support.apple.com/kb/HT1274 Also, see > https://discussions.apple.com/docs/DOC-5381
If it's 10.7 or 10.8, try resetting your password with your Apple ID by following the steps of the link above. If it doesn't work, reset the password using Recovery > http://discussions.apple.com/docs/DOC-4101

My mac pro will not turn on

When I turned on my macbook pro I saw this white screen and I do not know what is wrong?

Take each of these steps that you haven't already tried. Stop when the problem is resolved.
Step 1
The first step in dealing with a boot failure is to secure your data. If you want to preserve the contents of the startup drive, and you don't already have at least one current backup, you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data that has changed since your last backup, you can skip this step.
There are several ways to back up a Mac that is unable to boot. You need an external hard drive to hold the backup data.a. Boot into Recovery by holding down the key combination command-R at the startup chime, or from a local Time Machine backup volume (option key at startup.) Release the keys when you see a gray screen with a spinning dial. When the OS X Utilities screen appears, launch Disk Utility and follow the instructions in the support article linked below, under “Instructions for backing up to an external hard disk via Disk Utility.”
How to back up and restore your files
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 by holding down the key combination command-T at the startup chime. Connect the two Macs with a FireWire or Thunderbolt cable. The internal drive of the machine running in target mode will mount as an external drive on the other machine. Copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
How to use and troubleshoot FireWire target disk mode
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
Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to boot, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can boot now, one of the devices you disconnected, or a combination of them, is causing the problem. Finding out which one is a process of elimination.
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 3
Boot in safe mode.* The instructions provided by Apple are as follows:
Shut down your computer, wait 30 seconds, and then hold down the shift key while pressing the power button.
When you see the gray Apple logo, release the shift key.
If you are prompted to log in, type your password, and then hold down the shift key again as you click Log in.
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.
*Note: If FileVault is enabled, or if a firmware password is set, or if the boot volume is a software RAID, you can’t boot in safe mode. Post for further instructions.
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 damaged 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 4
Sometimes a boot failure can be resolved by resetting the NVRAM.
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
Boot into Recovery again. When the OS X Utilities screen appears, follow the prompts to 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.
Note: You need an always-on Ethernet or Wi-Fi connection to the Internet to use Recovery. It won’t work with USB or PPPoE modems, or with proxy servers, or with networks that require a certificate for authentication.
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 backup.
Step 8
If you get this far, you're probably dealing with a hardware fault. Make a "Genius" appointment at an Apple Store to have the machine tested.

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I have mac pro and firefox 3.0.19
I am trying to download a video from youtube.?
I can see the video. I want to download it and save in my computer to see it again.
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When I click on okay, another page comes, which says" converter and a box next to it . in the box is written FFMpeg. but I can change it to MEncoder. In another box, says configure conversion rules. When I click on it, nothing happen.Thanks for your help.
== This happened ==
Every time Firefox opened
== I want to download a video from youtube

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Configure conversion ?"
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(106527)

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I have mac pro...can not turn on my laptop

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