Commonly used to refer to Disk Utility.app, an application included with OS X.

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Unable to create disk image using disk utility (Input/output error)

I want to create a disk image of source 100.03 GB Ext Hard Disk Media on destination 5TB Lacie ST5000DX000-1H2170 there is greater than 1TB remaining on the destination disk. The Disk Utility progress ...
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2answers
70 views

Use free space on a Mac (with a SSD)

I have a MacBook Air with a 128GB SSD, I installed Yosemite on a second partition then removed it and now I have that: 50GB of free space and I can't find how to give it to Macintosh HD (the ...
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22 views

usb hard disk can be read by device manager not be read by disk manager?

Today when i format my usb hard disk ,the power is off ,when power is on again ,i reboot my pc ,something wrong with my usb hard disk. The usb hard disk can be seen in Device Manager ,but can not be ...
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19 views

I looking for clear and concise steps to copy a regular DVD onto my Desktop then burn the copy to a blank DVD

I'm looking to insert a DVD/movie into the disk drive and copy it to my mac in a file formatted in a way that will allow me to insert a blank DVD and burn previously mentioned file onto just mentioned ...
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27 views

OSX partition smaller than 16 GB

I'm trying to create a new partition because I need a case-sensitive filesystem for web development. But the Disk Utility won't allow me to create one smaller than 16.84 GB. What am I doing wrong?
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110 views

Remove hidden content from EMTEC 16GB flash drive

I purchased an inexpensive EMTEC 16GB USB flash drive with the intent to using it for a myriad of purposes (initially, as a start-up to install Windows via Bootcamp) and have been unable to remove the ...
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71 views

AppleScript shows “Document could not be opened. You don’t have permission.” but file can be opened?

I am getting a "The document [filename] could not be opened. You don't have permission" when attempting to access several files in an AppleScript. However, I can open these files manually without ...
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112 views

Mount Core Storage partitions on image of hard drive created with ddrescue

How do I mount a whole-disk image with an encrypted CoreStorage partition? Update: I found the answer! It was super-simple: hdiutil attach -nomount somePath.img The "nomount" flag is critical ...
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282 views

Why would re-formatting an external disk drive stop random drive disconnects in OSX Mavericks?

My old MacBook Pro Retina was over heating, so after a long story omitted, I got a new MBP Retina with Mavericks pre-installed, and my Seagate Thunderbolt(TB)/USB3 drive started unmounting and ...
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3k views

Getting the diskutil command to work in OSX Mavericks Single User mode

I'm currently writing some single user mode maintenance scripts. My current goal is to be able to perform permission repairs and disk formatting using the diskutil command in Single User Mode. ...
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507 views

Partition corruption, still can see files in single user mode, would like to retrieve files

The problem started after forcing the mac to shutdown. Since then, when trying to boot, it stays stuck at the grey apple with spinning wheel. I've tried a few generic things to be able to access my ...
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1k views

zpool: pool I/O is currently suspended

I'm using ZFS on OSX and I've zpool which is active and online: NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT WD_1TB 931G 280G 651G 30% 1.00x ONLINE - but I can't ...
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92 views

unrecoverable root partition when used as a second hard drive

What I did with my Macbook, I removed DVD driver ant mounted my old macbook hard drive there. BTW, my old disk was split into 2 partitions: root and data. root partition is where system files and my ...
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198 views

How to make bigger Macintosh HD partition

I installed OS X Mavericks Server as a virtual machine to ESX. I'm doing some testing and now I need more space. Macintosh HD partition is 50 GB and I have expand it to 100 GB total in ESX but I need ...
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820 views

Delete EFI Partition

I run diskutil list and have this schema: /dev/disk1 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *1.0 TB disk1 ...
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2k views

Why is Disk Utility / diskutil taking so long to zero out data?

I've tried with Disk Utility.app and diskutil at the commandline to zero out a 3TB external USB hard drive, and both work at about 1%/1hr. In Disk Utility.app I am using the 1-pass mode, and with ...
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483 views

Unable to delete or re-partition internal drive using Disk Utility

When using Disk Utility, after booting onto the recovery partition, I can't... Re-partition Delete partitions Repair partitions
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36 views

Restoring mac to pre OS install attempt

I recently tried to install the new OS X maverick, but about 4 min into the process it told me my disk needed to be repaired. That I should back up my stuff and restore the drive. I will do that, but ...
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84 views

Retina MBP won't recognize Archboot flash drive

I'm trying to install Arch on a flash drive. To do so, I'm trying to first get a bootable, "live" version of Arch on the flash drive I'm going to install it on later. I've followed the instructions ...
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1k views

Mac OS not allowing for disk partition

I tried adding a disk partition through Disk Utility on a Retina MBP under OS X 10.8.4. It was supposed to be a small, ~20 GB ExFAT partition on a 512 GB disk. For some reason, my disk was ...
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62 views

Disk Utility not finding disk

I have an external drive that was dropped. It doesn't mount anymore on my OS X box and Disk Utility doesn't see it. Is this the point where I'd need to bring it somewhere for expensive data recover?
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116 views

Screwed drive permissions, share between OSX and Ubuntu

I was looking on how to share files between my OSX and Linux systems, with this in mind, I've formatted the file system to HFS+, disabled journaling in OSX, and finally dumped all my files as ...
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7k views

Mac OSX - Why is /dev/rdisk 20 times faster than /dev/disk

According to the rasbery pi documentation, You can load your OS to a flash card with either /dev/disk or /dev/rdisk. rdisk stands for raw disk. /dev/disk is a block level device, why would rdisk ...
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6k views

MacBook Air startup disk not found, but verified

I have a MacBook Air that has suddenly stopped booting at all. I booted into recovery mode and see the harddrive fine in Disk Utility. The partition is there as well marked: Mac OS X Base System. I ...
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257 views

palimpsest not opening the disk management

I am using Ubuntu. I found from web search that to open Disk management below command is needed: sudo palimpsest But when I am trying it in the terminal and result was : command not found. I also ...
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320 views

Is CHKDSK a warning sign of failing drive?

This morning CHKDSK ran on its own during boot. It scanned 1 out of 3 HDDs in my PC. Is it a warning sign that that particular HDD is about die?
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187 views

Not enough disk space when doing a SOAP request on mac osx

I'm on Mac osx, I'm sending a SOAP request and the response is: There is not enough space on the disk. <s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"> <s:Body> ...
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200 views

is there a remote version of KDirStat

I love KDirStat (or equivalent) but I would like to be able to run it on remote host (which doesn't have X11 installed). Is there anything avaible (and free) which will allow me to get a treemap of ...
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5k views

I want to reformat my external hard disk but disk utility said it could not be unmounted

Hi I wanted to reformat my HP 500GB hard disk to MS DOS (FAT) by using Disk Utility but Disk Utility kept saying that the hard disk cannot be unmounted. I tried googling it but nothing seems to answer ...
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159 views

Cannot run diskutil, sudo or not

I cannot run diskutil on my brand new Retina Macbook Pro 2012. When I try to run it, (including sudo), the terminal says "command not found". I looked in usr/bin and usr/sbin and could not find ...
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176 views

Frequent Mac lockups due to fsck_hfs

My Macbook Pro (10.6.8) locks up every day at noon for several minutes (and often after sleep). I put 'Activity Monitor' up front right before noon sorted by %CPU, and saw that it ran 'fsck_hfs'. ...
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115 views

Use sparse image bundle instead of split and concat

Is it possible to use sparse image bundles on the Mac in the same fashion as I would use files splitted with Terminals split command? If I show the package contents of the sparse image bundle in the ...
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6k views

I forgot my encrypted disk password on OS X

My disk is formatted with Mac OS Extended (Journaled, Encrypted). I have a super long and random password. It won't let me paste my password in and I keep manually typing it wrong. There is nothing on ...
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2answers
10k views

How do you format a 2GB SD card to FAT32? (Preferably with Disk Utility)

I've been looking around for a way to do this for a while, but haven't been able to find the answer. I need to format my 2GB SD card to FAT-32, but I don't see the option in Disk Utility. If I ...
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23 views

How to back up “The disk has S.M.A.R.T. errors” and fix the errors [duplicate]

Possible Duplicate: Repair or recover drive from Mac OSX recovery mode My computer won't start up past the login screen so first i tried Safe Mode [Shift+Start up] didn't work . Then I ...
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348 views

Recover from botched full disk encryption using FileVault2

I decided to enable full disk encryption using FileVault2 in OSX Mountain Lion, but near the end of the encryption process, I get a message telling me that it failed, and that I should disable and ...
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270 views

Verifying permissions on OSX

Last week i was having trouble installing homebrew onto a new mac running mountain lion, i tried adding command line tools for xcode and installing X11 aswell as following a load of other things i ...
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185 views

System Does Not Boot From Various Bootable Recovery Disks

No matter what recovery system I have used, be it Acronis recovery disk or some other recovery disk that is intended for emergency system restoration, my system just stalls but still responds ...
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154 views

Safe and fast way to move a partition to begining of disk?

How can I move a partition to beginning of the disk in a fast and safe way?
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175 views

Create .img of a disk from command line?

I need to create a .bin or .img of a disk from the command line. I have tried using rawcopy (an .exe that I downloaded from the internet), but that is rubbish. Does anyone know of other ...
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4answers
9k views

How do you access the contents of a mounted DMG drive mounted through hdiutil and diskmout

My external USB drive failed. I made a .dmg image file of the drive using disk utility. Later I was not able to mount the .dmg image. I used terminal hdiutil attach -noverify -nomount name.dmg ...
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485 views

Mysterious “media” volume mounted on desktop Mac OS X

I have a mysterious volume mounted on my desktop that I can't seem to forcibly unmount. I've tried using umount and also diskutil, but it seems to automatically remount itself. I've copied my hdd with ...
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347 views

OS X 10.7 and 10.8 continuously going corrupt on several machines, disk unable to repair, requires clean install

I'm managing about a dozen iMacs varying in age from 3 years to 6 months. Every iMac has an afterparty 256GB Crucial M4 SSD, which have all been installed since roughly the beginning of the year. ...
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1answer
1k views

Create disk image from flash drive

I have a 16 gb flash drive that is formatted using my mac, made bootable, and an OSX installation image put on it. I'd like to keep that drive around so I can do it again in the future, but I don't ...
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4k views

What can I do when I get a “Cannot Allocate Memory” error after restoring a disk image?

I've downloaded Mac OS X Mountain Lion today and wanted to backup the installation image to a USB drive for later. I've created a new empty partition of at least 8 GB size on the external drive using ...
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312 views

External USB hard drive acting like internal drive

The power went out and my external hard drive got pretty messed up. After several repair attempts I gave up and tried formatting the thing. I wasn't watching, but I believe Disk Utility hung on ...
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230 views

How can I create a partition for OSX without erasing other partions on the disk?

I'm trying to install OS Lion on my desktop using uniBeast. I want OSX to be on the same disk as my Windows 7 installation, but the installer's disk utility won't let me create a new partition out of ...
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1k views

Carbon copy cloner vs Disk Utility save disk image

im trying to replace my macbook pro hard drive and want to migrate the lion and windows 7 partitions to the new drive without having to reinstall anything my question is.. What's the difference ...
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1k views

What does the Boot Camp Assistant do to my drive that I can't just do with Disk Utility?

What I understand is that Windows 7 will not install on GPT (GUID Partition Table) drives. Of course, all new Macs have their drives partitioned that way, and when you run the boot camp assistant, it ...
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86 views

Zerofree never ends. Is it doing anything?

I have been trying to use zerofree to reduce the size of my VM. It worked fine for one filesystem, but the other was mounted on / so it wouldn't let me. Then I figured I could use the 'recovery ...