Disk utility doesn't allow to partition

when I pressing the button "apply" it sends this error what's wrong?

Unfortunately, your computer's age has nothing to do with a disk failure.
Take no offense, but you seem to know little about computers and Mac, and I'm curious of why you wish to partition your disk. Usually, only advanced users need other partitions, for very specific use. You NEVER partition your disk for the pleasure, or just because someone told you to do so. You need to know exactly what you want to do.
Anyway, as CSound1, Eric Root and el_mancebo said, you need to :
1- check your disk health. To do so :
- boot in recovery mode (+R or ALT on boot)
- go to disk utility
- choose your disk
- in SOS tab, repair permissions and repair disk
2- backup your stuff (always in recovery) :
- get an external disk (blank and bigger than the datas on your disk, for instance, if you have 310GB used on your hard disk, your need a 320 GB external disk at least)
- go to disk utility
- choose your hard disk
- go to Restore tab
- choose your hard disk as Source, your external disk as Destination and click on Restaure.
BEWARE : you need a blank external disk, as it will wipe out all datas on this disk
When everything above is done, and only at that moment (or you may lose everything on your computer),
3- partition your disk (recovery mode) :
- go to disk utility
- choose not your system disk, but the physical hard disk (1st line, with a name dispalying disk capacity, name the manufacturer gave to it, and "Media"
- go to Partition tab
- choose how you want to partition your disk
Afterwards, you may need to recover your backup.

Similar Messages

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    Hi all,
    I just bought a new MacBookPro and installed Mountain Lion yesterday. I decided to use a encrypted file system (File Vault). So far everything worked fine.
    This morning I decided to do a clean install, as Migration Assistent carried over some data I do not need.
    So I booted into Recovery Mode, selected the harddisk and chose "Erase". As I wanted an encrypted volume again, Disk utility asked me for a password which I specified. Immediately after clicking ok, Disk Utility said "Not enough RAM to complete this request". After clicking OK, my partition went and since then I am strugglign to find out how to activate it (data not important, as everythign backed up).
    Apple Care also doesn't knwo what to recommend anymore.
    Here's what I tried:
    1) Command+R boot and Disk Utility
    2) Boot from external HD and Disk Utility
    3) Internet Recovery (ends with error)
    4) Delete PR
    The strange thing is that Disk Utility shows Macintosh HD on the top level with the option to partition (it doesn't show any indended partitions) but all options are grayed out. It's like Disk Utility somehow confused Parttion with physical drive and now gets confused.
    Any other idea other than sending the macbookPro back to Apple?
    Thanks
    Matt

    You should of taken the encryption off before you started that proccess. That is one thing they don't tell you. Never try to modify an encrypted partition.
    You may have to boot to the Internet (Online) Recovery HD system lto Re-Partition the drive as one partition.
    Hold down Command+Option+r keys at boot and keep them held down until you see a spinning globe in the center of the screen, then you can let them up. Have the computer WIRED to your unternet router.
    Once that loads open disk utility and select the Drive Name (Not volume name, IE Macintosh HD) and then the partition tab and select One partition from the Partition Layout drop down.
    If that doesn't work then the drive is FUBAR.

  • Disk utility doesn't allow partitioning of internal HD

    After having succesfully installed a Win7 partition with bootcamp I've now got 2 partitions,
    the Macintosh HD aund the Bootcamp partition.
    I'd now like to split my Macintosh HD partition (to get one separate for data only).
    However, in the disk utility this option is not selctable:
    + an - are greyed out,
    Partition Layout dropdpown menu is greyed out,
    Name format and size are greyed out.
    (Everything works fine on the mac and also the Volume & Rights checks by the disk utility were all o.k.)
    What is the reason for this behaviour and what can I do in order to split in two partitions?
    Your help appreciated, thanks.

    You should of taken the encryption off before you started that proccess. That is one thing they don't tell you. Never try to modify an encrypted partition.
    You may have to boot to the Internet (Online) Recovery HD system lto Re-Partition the drive as one partition.
    Hold down Command+Option+r keys at boot and keep them held down until you see a spinning globe in the center of the screen, then you can let them up. Have the computer WIRED to your unternet router.
    Once that loads open disk utility and select the Drive Name (Not volume name, IE Macintosh HD) and then the partition tab and select One partition from the Partition Layout drop down.
    If that doesn't work then the drive is FUBAR.

  • Disk Utility doesn't erase a partition...

    Hi.
    I know, there are many topics about partitioning and BootCamp, but none could help me so far...
    I just tried to install Windows 7 on my iMac...I got the black screen, now I found the solution on the AppleSupport page, but that's not the point.
    Since I couldn't use the Windows Partition, I tried to erase it with BootCamp. It said that after the repartitioning, the size my Macintosh HD would have been 465 GB (it was 500 at the beginning) so it was deleting Windows, but not resizing the partition.
    So I tried to initialize with Disk Utility, and I ended up with a partition initialized in HFS+, but that I cannot edit.
    I'd like to erase it and get free space, in order to expand my Mac OS X partition, but for some reason I can't.
    I even downloaded the Demo of Drive Genius, and it says that that partition is "read only" so it cannnot erase it.
    How can I get my 40GB back??

    You blew whatever chance you had.
    And no, using Boot Camp Assistant, which is correct way to remove it, does not "return" all the space in every case. Some is "lost."
    Using DU though your only choice is to delete the volume you created and go from there, and try to extend.
    But never work without a safety net, a backup or two.
    You don't need DG3. It is good to have Disk Warrior. But your issue is with the partition tables, and not a file system error. iPartition might. But in reality, SuperDuper is your best bet: clone your system and reformat your drive (booted from your clone) and do a restore.
    Try again with Disk Utility to remove the space.

  • I have an old iBook running 10.3.9 and I want to wipe/erase the disk and get rid of it. Problem is Disk Utility doesn't allow me to erase, it has everything grayed out. And I don't have the original startup CD. Any ideas?

    Need to wipe 10.3.9 iBook with no OSX cd and disk utility not allowing me to do it.

    You need to use an alternate system; this can be a Mac OS X install disk or a system on an external drive. If needed, buy one from a source such as Amazon or eBay, or phone Apple and ask if they have replacement original disks in stock.
    (122593)

  • Disk utility does not allow to restore Macintosh HD after I deleted a small size (1GB) partition

    Hi, when I tried to create a new 1GB partition (on my Mac mini 2011, using Mac OS X 10.7.3) and then to delete it I could not restore (increase) Macintosh HD size using Disk utility (diskutil list shows the same value for Macitosh HD (498,17GB) partition before and after I deleted a new created 1GB partition).
    Please help, how I can restore the original size of Macintosh HD when Disk utility does not allow to restore Macintosh HD after I deleted a small size (1GB) partition?
    Thank you.

    The bottom right corner dragging does not help in my case, because it shows that Macintosh HD partition size is maximal, but its real size did not change after I removed 1GB partition.
    Maybe any other idea can help me, for example some built-in tool like diskutil which allows to view and manage unused partitions in terminal?
    Thank you.

  • Help ,Disk utility does not allow me to partition my internal HD

    hello , i want to partition my internal hard drive but for some reason disk utility does not allow me to , when i click on the partition window everything is greyed out, i read on other thread that file vault might be the problem but is already off , i can t figure out what the issue is any ideas ??? here is a screenshot.

    Not if you want to be able to restore the Boot Camp partition using Boot Camp Assistant. There are alternative boot loaders you can use to add Windows and Linux to an OS X drive. You would first need to restore your drive by deleting the Boot Camp partition you now have. Then take a look at The rEFInd Boot Manager: Getting rEFInd - Roderick W. Smith.

  • Disk Utility: MediaKit reports no such partition

    What is up with my disk?
    On my brand new mac mini, I played around with resizing partitions in Disk Utility, it worked fine, and I eventually returned it to the original single-partition state.
    Then, I ran boot camp, and told it to create a 10 GB partition.
    Then, I installed Linux (64-bit Ubuntu) -- from the Linux installer I deleted the windows partition, and a zero-size partition before it, and put Linux swap and ext3 partitions in that space.
    Now, from the mac side, if I try to shrink the boot partition again, I get the error "MediaKit reports no such partition".
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    Another disturbing thing is that if I type "sudo pdisk" on the Macintosh command line, and give the 'L' command to list partitions on all disks, pdisk exits with the error "Floating point exception"
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    2007-11-04 00:09:19 -0400: Disk Utility started.
    2007-11-04 00:09:40 -0400: Preparing to partition disk: “Hitachi HTS541612J9SA00 Media”
    2007-11-04 00:09:40 -0400: Partition Scheme: GUID Partition Table
    2007-11-04 00:09:40 -0400: 3 volumes will be created
    2007-11-04 00:09:40 -0400:
    2007-11-04 00:09:40 -0400: Partition 1
    2007-11-04 00:09:40 -0400: Name : “Macintosh HD”
    2007-11-04 00:09:40 -0400: Size : 90.1 GB
    2007-11-04 00:09:40 -0400: Filesystem : Mac OS Extended (Journaled)
    2007-11-04 00:09:40 -0400: Do not erase contents
    2007-11-04 00:09:40 -0400:
    2007-11-04 00:09:40 -0400: Partition 2
    2007-11-04 00:09:40 -0400: Name : “Linux Swap”
    2007-11-04 00:09:40 -0400: Size : 488.3 MB
    2007-11-04 00:09:40 -0400: Filesystem : Mac OS Extended (Journaled)
    2007-11-04 00:09:40 -0400: Do not erase contents
    2007-11-04 00:09:40 -0400:
    2007-11-04 00:09:40 -0400: Partition 3
    2007-11-04 00:09:40 -0400: Name : “DISK0S4”
    2007-11-04 00:09:40 -0400: Size : 10.2 GB
    2007-11-04 00:09:40 -0400: Filesystem : MS-DOS (FAT32)
    2007-11-04 00:09:40 -0400: Do not erase contents
    2007-11-04 00:09:40 -0400:
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    2007-11-04 00:09:40 -0400: Partition failed for disk Hitachi HTS541612J9SA00 Media MediaKit reports no such partition.
    2007-11-04 00:09:41 -0400: Partition complete.
    2007-11-04 00:09:41 -0400:
    2007-11-04 00:09:41 -0400: Error with partition: MediaKit reports no such partition.

    It doesn't sound like you've actually tried reformatting the entire drive, just resizing partitions. There is absolutely no reason why mountability should enter into the picture at all since you can't format a drive if any volumes are mounted.

  • Lion Disk Utility doesn't finish erase

    Since installing Lion (clean install) disk utility doesn’t finish erasing or partitioning external disks. I used the disk utility from the install drive to erase the internal drive before installing Lion, this worked fine, but ever since it failed to erase any of my external drives. It starts of as normal but the progress bar stops half way and just never finish. Disk Utility does respond.
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    Hello,
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    Purely conjecture, your serial ATA controller may be bad (or the cable). I assume nothing shows in System Profiler/Hardware/Serial-ATA either. Maybe try the SMC reset?
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