How do I reformat my hard disk.

When i go into command R mode there is a lock and requiring a password but i forgot what it was. I cant reformat using the installation disk because when I click on it there is an error ''You cant use this version of the application Install Mac OSX with this version of OSX. (i am using mountain lion). You have install mac osx 23.1.1. Any other way to reformat it?

Welcome to Apple Support Communities
You have firmware password. If you don't remember what the firmware password is, take the MacBook Pro to an Apple Store or reseller because it can't be changed by the user.
After doing this, start the MacBook Pro holding Command and R keys, and open Disk Utility. Then, choose Macintosh HD in the sidebar, go to Erase tab and erase the drive

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How Do I Reformat The Hard Drive?

Hello,
I just bought aToshiba Satellite P505-S8940 laptop. It did not come with a recovery disk. I had to use their Recovery Disc Creator to make copies of 2 system recovery disks and 2 application disks. I would like to know how do I reformat the hard drive? Thanks!

Satellite P505-S8940
See the section Recovering the Internal Storage Drive, which begins on p. 62 of the User's Guide.
Satellite P500 Series User's Guide
-Jerry

How do i reformat my hard drive on mac mini late 2011 with yosemite before selling my mac

how do i reformat my hard drive on mac mini late 2011 with yosemite before selling my mac

You can't legally sell or give away that computer with Yosemite installed.
Before you sell or give away your computer, in addition to the steps listed in this support article, take these steps:
1. Run Apple Diagnostics or the Apple Hardware Test. The buyer will do this (or he should), and you don't want to be surprised by the results.
2. Reset the PRAM and the SMC, which might contain personal information.
3. If you set a firmware password, remove it by running Firmware Password Utility in Recovery mode.
4. If you activated FileVault in OS X 10.7 or later, turn it off.
5. If you use Boot Camp, the partition must be deleted.
6. If you created any other data partitions on the internal drive, remove them in Disk Utility.
7. If the machine has an internal hard drive, erase the one remaining data partition with the option to zero out data. An SSD doesn't need to be zeroed.
You can't legally or practically transfer any software downloaded from the Mac App Store to the new owner of the machine, even if it was free. That includes OS X, so if you upgraded to OS X 10.7 or later, you must reinstall an older OS, either from the installation media, if applicable, or by starting up in Internet Recovery mode (option-command-R at the startup chime.) If you installed from physical media, deliver those to the new owner.
If you're selling the machine, or donating it in working order, and it originally shipped with OS X 10.4 or 10.5, then you have the option of installing either from the discs that came with it or from a retail Snow Leopard disc (which you must then transfer to the buyer.) The buyer should understand that if he doesn't get the original discs from you, he won't get the bundled iLife applications or the Apple Hardware Test. Replacements for the original discs can be ordered from Apple.
The new owner will have to redownload any software that came from the App Store, including OS X upgrades, under his or her Apple ID. If you ever updated the bundled iLife applications (Garage Band, iMovie, and iPhoto) through the App Store, you can't transfer those either. The buyer will have to purchase them.
Remove the machine from your list of registered products. If it's still covered by an AppleCare Protection Plan, transfer the coverage to the new owner by following the instructions in the AppleCare Terms and Conditions (under the heading "Transfer of Plan.")

How to reinitialize an external hard disk drive which serves for Time Machine?

How to reinitialize an external hard disk drive which serves for Time Machine?
Thanks for your answer.

Everything you need to know about initializing (formatting) is here.
http://pondini.org/OSX/DU1.html
Lots of useful information on TM is here in the same place.
http://pondini.org/OSX/Home.html

How to transfer video from hard disk to i tune?

how to transfer video from hard disk to i tune? can any one please?? help me also in guiding if anything else is required to be done to transfer the content to ipad....

Drag it into the open iTunes application window. You may need to use a product such as MPEG Streamclip to convert it to MPEG-4 first.
(59829)

I disabled my Macbook Hard Disk and lock the settings, after i try to reboot, the system wouldn't come up. It refuses to read instructions from the hard disk. How can i enable the hard disk when the system wouldn't come up?

I disabled my Macbook Hard Disk and lock the settings, after i try to reboot, the system wouldn't come up. It refuses to read instructions from the hard disk. How can i enable the hard disk when the system wouldn't come up?

How do you disabled it if running the same?

How to install the second hard disk (HP ProBook 6560b LG658EA) ?

How to install the second hard disk (HP ProBook 6560b LG658EA) ?

Hi,
You can install a second HDD in the Upgrade Bay - this is detailed on Page 67 of your Maintenance & Service Guide.
Regards,
DP-K
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****Please mark Accept As Solution if it solves your problem****
****I don't work for HP****
Microsoft MVP - Windows Experience

How can i get my hard disk cable replacement

how can i get my hard disk cable replacement in Ghana

Remove or rename a folder on the root level probably called something like Private or Video or DCIM.

How do I fix Your hard disk does not have enough free space?

How do I fix Your hard disk does not have enough free space?

Select the icon of your startup volume ("Macintosh HD," unless you renamed it) in the sidebar of a Finder window, and open the Info window. How much space is Available? Specify gigabytes (GB) or megabytes (MB).

At only 15 months of age, my MacPro crashed yesterday! Any idea how I can save my hard disk from being destroyed if I hand it in for repair?

At only 15 months of age, my MacPro crashed yesterday! Any idea how I can save my hard disk from being destroyed if I hand it in for repair?

Open it up. Buy a new replacement drive. Install Mac OS. Then give it to them if you still have trouble.
As for the install failing,
I never do the older "archive and install"
I format and initialize first, even zero the drive, and only then install.
of course all the data is lost.
Data Rescue 3 demo can scan a drive but you need to have setup a 2nd boot drive to work from, AND you would need part of that 2nd drive partition for recovery of data. 30-50GB system partition and 150% the size of the drive you want to recover.
TimeMachine I never adopted or liked but 350% and would only use as secondary backup with cloned copy of your drive.
Backups can be scheduled, run at night or weekend or both, a weekly clone and daily sets.
Disk Warrior 4.2+ is another $100 (DR3 is about same but demo is free to try).
A spare external drive case $30? and TWO hard drives, a replacement and backup/recovery $100 each?
Just some ideas to throw out there....
Bootable clones though you will find are very useful, handy.
I like the small 40GB emergency boot partition - put one on your TimeMachine drive etc.
LION: the one good thinig: it has a recovery mode partition and new Macs have "net install" feature and minimal hardware diagnostic over the internet to do Apple Hardware Test. Lion $30 and might actually want to install it on external.
So DO try installing OS X on one of your external drives - create 40GB volume just for that - if you can please.

How do i erase my hard disk

How do I erase my hard disk to prepare for resale?

Prepare Your Mac for Sale
Boot from the OS X Installer Disc One that came with the computer. 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 the startup volume from the left side list then click on the Erase tab. Set the format type to Mac OS Extended (Journaled) then click on the Options button. Select the one pass Zero Data option and click on the OK button. Then click on the Erase button.
Note: You can skip the Zero Data option if you are not concerned about removing sensitive personal data from the hard drive. If you choose to skip this part of the process then it is possible for others to recover data from the hard drive. The Zero Data procedure will prevent others from getting access to your personal information.
This process will take 30 minutes to several hours depending upon the size of the hard drive. After formatting has completed quit DU and return to the installer. Now complete the OS X installation. At the completion of the installation do not restart the computer. Instead just shut it off. The next user will be presented with the Setup Assistant when they turn on the computer just as it would if new out of the box.

How can I erase my hard disk with OS X 10.8.2?

How can I erase my hard disk with OS X 10.8.2?

If you want to erase the hard disk and reinstall OS X, follow these steps:
1. Back up your data to an external disk if you don't want to lose everything. When you erase a hard disk, everything is deleted.
2. Press Command and R keys while your Mac is starting to start into OS X Recovery, and open Disk Utility.
3. Select Macintosh HD on the sidebar, go to Erase tab and erase the disk.
4. After erasing the disk, close Disk Utility and reinstall OS X, so OS X will be installed with factory settings.
Don't forget to install iLife applications after the installation, if you need them. They come in the Applications DVD (if your Mac came with Snow Leopard or older), or open App Store > Purchases and download them

How do I reformat my backup disk?

I deleted a file from an external hard drive that I use to make Time Machine backups from my MacBook Air. Apparently I did something wrong (I moved the file to trash on my computer, but didn't empty trash before ejecting the disk, I suspect that the problem is) and now I cannot use the backup disk any longer, because it says that it is "read only". I used Disk Utility to verify and try to repair the disk, but I can't. It says this: "Error: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files." Since the disk is a backup, I don't need to know how to do that, but can som

If you deleted a file you need to recover you can use a utility like data rescue or disk warrior.
They are expensive though.
If you just want to reformat the backup disk that is easy.
In Disk Utility go to the Partition tab and select Partition Layout.. change it to one or two partitions .. whatever you like.
Click on the options below the graphic of the disk partition.
Ensure the disk is partitioned correctly using GUID not MBR.
Ensure the disk is going to be formatted.. Mac OS extended Journaled .. that is the only acceptable format.
Then click apply.
However if you do this.. your file that you deleted is lost forever. (I am just unsure if you want to recover this file or not.. or it was you think the cause of all this happening).

How do i reformat imac hard drive and restore time machine backup?

How do I reformat my iMac internal hard drive and restore from a Time Machine backup?
I have an iMac 20" Mid 2007 with a problematic hard drive.
IntelCore 2 Duo, Processor speed 2 Ghz
800 Mhz Bus speed
4 GB RAM
250 GB Western Digital Hard Drive
10.6.3
Was getting a question mark upon booting up, so I booted from a 10.6.3 Snow Leopard CD and ran disk utility. Repair disk was interrupted with an error message. 'Disk utility can't repair disk. Backup files, reformat disk and restore backed up files.'
1. Should I select Erase, Mac OS Extended Journaled, Erase?
2. If I do this, won't I lose my networkability, and therefore lose access to Time Machine backups?
3. If it were you, would you go ahead and replace the hard drive? Not sure I should trust this hard drive!
4. If I need to replace the hard drive, can you send instructions?
Thanks!

Clean Install of Snow Leopard
     1. Boot the computer using the Snow Leopard Installer Disc or the Disc 1 that came
         with your computer. Insert the disc into the optical drive and restart the computer.
         After the chime press and hold down the "C" key. Release the key when you see
         a small spinning gear appear below the dark gray Apple logo.
     2. 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 the hard drive entry from the left side list (mfgr.'s ID and drive
         size.) Click on the Partition tab in the DU main window. Set the number of
         partitions to one (1) from the Partitions drop down menu, click on Options button
         and select GUID, click on OK, then set the format type to MacOS Extended
         (Journaled, if supported), then click on the Apply button.
     3. When the formatting has completed quit DU and return to the installer. Proceed
         with the OS X installation and follow the directions included with the installer.
     4. When the installation has completed your computer will Restart into the Setup
         Assistant. Be sure you configure your initial admin account with the exact same
         username and password that you used on your old drive. After you finish Setup
         Assistant will complete the installation after which you will be running a fresh
         install of OS X. You can now begin the update process by opening Software
         Update and installing all recommended updates to bring your installation current.
Download and install Mac OS X 10.6.8 Update Combo v1.1.
If you have your Time Machine backup drive connected, then you can use Setup Assistant to migrate your Home folder, application support files, and third-party applications and system preference files. I recommend doing this via the Setup Assistant when the option appears.

How can i access the hard disk and know the no of partitions

sir
i want to access the hard disk and know how many parttions the hard disk have means c,d,e,f,g or may be c,d,e? also volum no or serial no.
but i do not know how?
plz help me and send me a code
thanks in advance
if this quesstion is not related to this forum plz guide me that where i put this quesstion?

You figure out how to do it on your OS using C/C++ code.
Then you write a wrapper in JNI to call your C/C++ code.

How do I reformat my hard disk.

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