I can t partition my drive

when i try to partition and reinstall my mountain lion (online) coming an error tha the drive canot mounted.i think mac keeper instalation did that problems plz help!!!

You cannot repartition your startup volume. You do not want to repartition it or you will lose all your files and the Recovery HD. If you boot from the Recovery HD it won't let you repartition the drive, either.
What you can do is erase your OS X volume and reinstall Mountain Lion from scratch:
Install or Reinstall Lion/Mountain Lion from Scratch
Be sure you backup your files to an external drive or second internal drive because the following procedure will remove everything from the hard drive.
Boot to the Recovery HD:
Restart the computer and after the chime press and hold down the COMMAND and R keys until the 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.
Erase the hard drive:
  1. Select Disk Utility from the main menu and click on the Continue button.
  2. After DU loads select your startup volume (usually Macintosh HD) from the
      left side list. Click on the Erase tab in the DU main window.
  3. Set the format type to Mac OS Extended (Journaled.) Optionally, click on
        the Security button and set the Zero Data option to one-pass. Click on
      the Erase button and wait until the process has completed.
  4. Quit DU and return to the main menu.
Reinstall Lion/Mountain Lion: Select Reinstall Lion/Mountain Lion and click on the Install button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible
            because it is three times faster than wireless.

Similar Messages

  • Can i partition hard drive and run 10.6 on one and 10.4 on other

    I have software that only runs under 10.4 on my older Imac. I would like to partition hard drive and run 10.6 on one and 10.4 on the other. Is this possible? Can I get instructions?

    Yes.
    Just set up the partitions.  If you already have a 10.4.x and 10.6.x drives then "clone" them up as bootable backups with a backup utility like Carbon Copy Cloner or Super Duper.
    When booting you can hold down the option key to get a list of bootable volumes (select with arrow keys and hit return).  You can use Startup Disk for either of them to define the default system to boot from if you don't use the option key technique.
    If you don't already have these systems then of course you will have to install them in their respective partitions.
    You have to realize of course that these are two distinct systems each with their own version of your login directory.

  • Using 1TB MyBook for TimeMachine - Can I Partition The Drive?

    Hi,
    I've just purchased a 1TB external hardrive that I've connected to my router.
    My Mac has instantly recognised it and I'd like to start using it for Time Machine backups.
    However, I'd also like to use some of the space to directly copy over music / movies / files etc that I can then share over the network with my other macs.
    I'm guessing I need to partition the drive but Disk Utility can't see the drive and the browser based preferences for the drive don't seem to throw up any clues either.
    One thing I've noticed is that under the Shared tab in a Finder window there are 2 apparent drives:
    MyBookWorld (which has a standard sort of folder structure)
    MyBookWorld-Backup (which is the drive name Time Machine recognises)
    Would it be the case that TM will create the back up (around 200GB) and the remaining space will still be available to the 'MyBookWorld' shared drive until such a time that both those drives above meet in the middle?...
    Has anyone else done this or does anyone know how to do this?
    Thanks in advance!

    I've just purchased a 1TB external hardrive that I've connected to my router.
    My Mac has instantly recognised it and I'd like to start using it for Time Machine backups.
    Note that this is not officially supported and I've heard some reports of this being unstable. If you do this, make sure you have alternate backups - which, of course, you should anyway. See my [Mac Backup Guide|http://www.reedcorner.net/thomas/guides/backups> for more on this.
    However, I'd also like to use some of the space to directly copy over music / movies / files etc that I can then share over the network with my other macs.
    You certainly can partition it, though you'll have to remove it from your router and connect it directly to your Mac to do so, I believe. Note that your backup partition needs to be at least 2-3 times the size of what you're backing up. Also note that you should not try to back up anything from the other partition(s) onto the backup partition... a backup stored on the same physical drive as the source is no backup at all. If the drive fails, all is lost.

  • Boot Camp Assist can't partition hard drive

    Boot Camp won't partition my 500GB internal HD. I get the message:
    "The startup disk cannot be partitioned or restored to a single partition. Back up the disk and use Disk Utility to format it as a single Mac OS Extended (Journaled) volume. Restore your information to the disk and try using Boot Camp Assistant again." I had recently used SuperDuper to replace my original single partition internal HD with the new 500GB HD with three partitions. I had not setup Boot Camp on the original HD. After getting the Boot Camp Assist error message on the new HD I used SuperDuper to clone back from my original HD (which was now external) with a single Mac OS Extended (Journaled) volume. I then ran Boot Camp Assist again and got the same message. I ran Disk Utility Verify Disk Permissions and got some errors which I then successfully repaired. I still get the same Boot Camp partition error. Any suggestions?

    When you partition your drive you are given the option to format it for OS 9, if you choose this option your drive will be formatted to be incompatible with Boot Camp. This incompatiblity will remain when you put it back to a single partition unless you go to options and select the top radio button (format for Intel Mac) to create a GUID Partition Table (at least that's what I did and it fixed the problem).

  • HT1175 I have a third generation Time Capsule can I partition the drive?

    I am setting up Time Capsule and Time Machine for the first time and it would be nice if I could partition the external drive for two Mac's.
    Is this possible?

    Is this possible?
    In theory yes. But, you would have to open up the Time Capsule case, pull the hard drive, install it in a separate enclosure, partition the drive using Disk Utility on your Mac, then re-install the drive again.
    This is a ton of work, and not easy.....not to mention that it will void the warranty, if in effect.
    If you do nothing, Time Machine will automatically keep the backups of each Mac separate. That should be adequate for most users.

  • Can I partition a drive in Disk Utility without erasing files?

    Hello,
    According to the third screenshot, I have the option of partitioning an external drive without losing files already on it, but when I try to do so, I only get a message indicating that it will erase the disk:  http://osxdaily.com/2009/11/20/resize-partitions-in-mac-os-x-with-disk-utility/
    I backuped my internal drive with Time Machine and I would now like to partition it so that only one half is for Time Machine purposes.  If it's possible to do that without starting from scratch, if I decide later to eliminate that partition, would that require losing any files?
    Thanks.

    You may find your answer here. Have a look around.
    http://pondini.org/OSX/DU.html

  • I want to know if I can backup my Ipad to an external harddrive. I have a pc with xp pro media edition and a partitioned hard drive with very little space on C and lots on D. I am trying to update my Ipad to 5.1.1 and it says it needs 12  gb to backup.

    I have a Sony Vaio desktop PC with a partitioned hard drive, running Windows XP Pro. There is 13 gb on C drive with the OS, and 140 gb left on D drive. I am  trying to update my Original Ipad from 4.3.4 to 5.1.1 and because C drive is full ( I have moved everything that can be moved to D drive) mostly from Microsoft updates over the years, I am unable to do  the backup Itunes is telling me I have to do to update or lose all media on this iPad. 12.67 gb is required to do the backup and I have a whopping 965.2 MB.  I can not get the cloud to use as backup as it requires 5.0 or better. Does anyone know if I can back up to D drive,  and if so how? Also, I have a 1 terrabyte WD mini external hard drive I just got as a gift...could I do the backup to it and, again, if so, how? Please explain from start to finish, as my brain is now fried from, first from finally getting Itunes updated to 10.6 ,and now trying to do this update. Thanks to anyone for their help!!

    iOS device backups are stored in your iTunes library.
    Move your iTunes library to an external drive.

  • I have partitioned my time capsule, but I can't get it to work as a Time Machine back up and permanent media server for both mac and PC. What format do I need to partition the drive to so that it works for both mac and windows and so that it will be visab

    I have partitioned my time capsule, as I want part of it to act as a media server for both mac and windows. However I don't know what format that I need to partition it to. I also can't make it a permanently accesible drive. I want to restore the drive to the original format (which I don't know) and start again and re-partition the drive in a format that can be used for media by both mac and PC and for time machine back-ups and make the media part of it permanetly accesible so I can add and acccess my files.
    Thanks

    You are mixing up a couple of things here.
    The TC drive cannot be partitioned without removing it.. did you do that?
    If you partition it you must use a Mac disk utility and use the HFS+ ie standard Mac format. And GUID partition table not windows type.
    You can select erase disk in the airport utility.. that will take the disk back to original format. No partitions. TC is deliberately not partitioned as it is not a media server.. it is a backup device for TM. Over time .. the disk will be filled with TM backups so you have a long history of file changes to your computer.
    There is no media server in the TC.. it is merely disk storage.. you can serve files from it to a media device.. but the TC itself is dumb as dumb.
    Now the actual format of the drive is irrelevant to the PC.. The TC offers SMB file services to the network. You can copy files to and from the TC as if it was a local disk without caring one iota about the format. The TC handles that .. it is not a local disk .. it is a network drive.
    Although you cannot partition the TC. you can still copy files to it.. this does have implications for TM.. but as long as there is plenty of free space should not be a major issue.
    You can create a disk image via the disk utility in a Mac.. and as stated you can create partitions if you do it on a Mac with the disk directly connected which means breaking warranty if any exists on the TC.

  • Do I need to use all the hard drive for time machine or can I partition it

    Do I need to use all the hard drive for time machine or can I partition it

    You cannot partition a TC disk.
    See pondini about mixing data and backups.. but remember this.. the TC has no way to back itself up and TM cannot backup files on the TC. Anything not backed up on the TC will be lost at some future point.
    http://pondini.org/TM/TCQ3.html

  • Can I partition a hard drive so that one partition is for windows files and the other is for time machine backups?

    I have a 1TB WD passport that currently contains windows files e.g photos, documents, etc. Can I partition it so that one partition contains these files and the other partition is used for time machine backups? Also, how do I change the partition system on the hard drive so that it uses the GUID partition system?
    Thanks in advance.

    Yes, you can, though you need to format and partition the drive from the scratch.
    1) back up your PC data on other drive.
    2) partitioning your drive into 2 partitions with Disk Utility.
    3) format one partition by Mac OS extended (journaling) for Time Machine, the other by exFAT for PC data.
    4) restore PC data on exFAT partitioned drive.

  • Can you partition the Time Capsule hard drive?

    I would like to back up through AirportExtreme 2 different Macs with Time Machine
    but obviously I would first need to partition the Time Capsule HD !
    Is it possible and how would I go about this? I can't find no infos in the manual...
    Thanks for your help.

    First you do not have to partition the drive to backup multiple computers. Each computer creates a separate file for the backup.
    Second there is no way (currently) to partition the drive without taking the TC apart, removing the hard drive, putting it in an external drive enclosure, and partitioning it.

  • Can I partition an external drive into MSDO and MACOS extended and use under bootcamp ?

    I am interested in using Windows 8 alongside my OSX MAVERICK with the Bootcamp 5 solution.
    However, I am trying to save the space on my internal SSD . Can I partition my 4TB WD external drive into 3 parts like this :
    1.5 TB dedicated for Time Machine in MAC OS Extended Format
    1,5 TB MAC for general purpose in MAC OS Extended Format
    1.0 TB Windows for my PC games and other stuff in exFAT for files larger than 4GB
    Is this possible at all or what would be better ?
    Thanks

    To resize the drive do the following:
    1. Open Disk Utility and click on the Continue button. Select the hard drive's main entry then click on the Partition tab in the DU main window.
    2. You should see the graphical sizing window showing the existing partitions. A portion may appear as a blue rectangle representing the used space on a partition.
    3. In the lower right corner of the sizing rectangle for each partition is a resizing gadget. Select it with the mouse and move the bottom of the rectangle upwards until you have reduced the existing partition enough to create the desired new volume's size. The space below the resized partition will appear gray. Click on the Apply button and wait until the process has completed.  (Note: You can only make a partition smaller in order to create new free space.)
    4. Click on the [+] button below the sizing window to add a new partition in the gray space you freed up. Give the new volume a name, if you wish, then click on the Apply button. Wait until the process has completed.
    You should now have a new volume on the drive.
    It would be wise to have a backup of your current system as resizing is not necessarily free of risk for data loss.  Your drive must have sufficient contiguous free space for this process to work.

  • Can I back up a bootable partition from an APM drive to a GUID-partitioned hard drive for storage, later to be able to clone restore the backup back to an APM and have it be bootable on a PowerPC?

    Tongue twister of a question, huh?
    I am creating a APM-partitioned hard drive for use with a PowerPC iMac G5, so I can have a fresh OS install on one as a reference, and the other be my usable OS.  Now, I also want to back both of these partitions up on a storage hard drive that I also want to contain partitions that are bootable on an Intel mac (GUID).  My question is, can I clone my APM partitions as backup to designated partitions on my GUID backup/storage hard drive (which I plan on being able to boot other partions on an Intel Mac), and have the option of later cloning the same APM partitions back to an APM-paritioned hard drive and have them still be bootable on a Power PC?  I know I won't be able to boot a Power PC from off of the GUID-paritioned drive, but I want to be able to restore my APM-partitioned drive incase things go sour with it.
    Thanks so much for your time, guys!

    Block-level copier that copies not just the files but the filesystem structure as well. But files can be moved from GUID to APM partitioned devices without any effect on the file. The partition scheme affects whether an installed system will boot a particular type of hardware.
    If you installed OS X on a GUID partitioned drive you would not be able to boot a PPC Mac.
    And, you're most welcome.
    Please note the items listed under Legend in the right sidebar of this page.

  • I have a brand new airport extreme. I just ordered a WD My Book Studio 2TB Mac External Hard Drive Storage USB 3.0 Can I partition this and use one 1tb as a time capsule and 1tb on my desktop of my mac as a wireless hard drive? If so how?

    How would I do this?

    To partition the WD My Book, you could temporarily connect it to your MacBook Pro via USB. Then use the Disk Utility to partition it into two separate partitions of whatever size you choose for each.
    Once partitioned and formatted (I would recommend HFS+), you can then disconnect the drive from the MacBook Pro and attach it to the new AirPort Extreme. The Extreme should now "see" the drive as two separate drives. You would then use the AirPort Utility to share out both drives.
    For Time Machine, you would just need to select the appropriate shared drive.

  • Can I partition an external drive and install 10.6.8 so I can run some older software?

    I have older software that won't run on my 21.5 iMac. Can I partition a 3TB Lacie external drive, then install 10.6.8 on it so I can use the older software?

    The computer that I purchased did come with Parallels Desktop 10 for Mac, but I thought that was only for running some Windows software. Not a clue how to use it.
    I actually asked a similar question about installing the older system on the external drive when I talked to Apple yesterday. They guy said go ahead and try it! Huh?

Maybe you are looking for