Apple's built-in disk management utility for the mac. Erases, formats, and restores volumes and drives.

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2
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2answers
6k views

Restore disk in single user mode

I wonder if it is possible to restore one partition to another in command line? The similar operation can be performed with Disk Utility, but unfortunately I cannot boot in graphics mode (even safe ...
1
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1answer
5k views

How to repair external hard drive that fails diskutil with 'Disk Full Error'

If I run fsck_hfs -y -d /dev/rdisk2s10 it putters along, rebuilds the catalog B-tree then fails when writing the new catalog to disk. bash-3.2# fsck_hfs -d -y /dev/rdisk2s10 ** /dev/rdisk2s10 Using ...
1
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1answer
1k views

What's the difference between enabling Time Machine's “Encrypt Backups” option, and encrypting my disk from Disk Utility?

I'm setting up Time Machine backups on a new external hard disk. I chose to first encrypt the disk via Disk Utility: But I also see these options: Is there any difference between an "Encrypted" ...
1
vote
1answer
408 views

Get the UUID from a mostly dead hard drive?

I have a mostly dead internal hard drive in my '07 iMac. I've switched the machine over to an external FW800 drive but every now and then, on reboot, the mostly dead internal drive will mount on boot ...
0
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0answers
113 views

Cannot partition hard disk although file system is OK

Here is what Disk Utility logs when I try First Aid → Repair Disk: Verifying and repairing partition map for “TOSHIBA MK3265GSXF Media” Checking prerequisites Checking the partition list Adjusting ...
0
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1answer
109 views

USB drives connected to hub disppearing

I've got four external USB drives connected to a 7 port powered dlink hub. All of them are externally powered, save for one of them. The hub is connected to a late 2012 Mac Mini. If I connect the ...
1
vote
1answer
2k views

Disk Utility not opening in Mavericks

I had used a Seagate external HD as Time Machine back up for a year or so. Since I got a gift of a better EHD now I wanted to erase all data in the old EHD. I thought a simple Format through Disk ...
0
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0answers
385 views

Unable to create new partition with Disk Utility on external drive

I'm trying to create space on an external drive to clone my mac as a bootable volume with CCC. With Disk Utility I cannot modify it for some reason (probably because the same disk is used with Time ...
1
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0answers
2k 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 ...
1
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0answers
89 views

Attempting to restore .img files to disk causes corruption

When I download .img files for writing to a CD or USB I've noticed a problem under OS X (including Mavericks). If Disk Utility recognizes the image and burns it, the resulting disk is corrupted. If ...
2
votes
1answer
234 views

Grow HFS+ partition at the end of harddrive without partition-manager-cd or moving to another drive

I've got two HFS+ partitions and would like to grow the latter one but neither disk utility nor the commandline diskutil allow that. I don't want copy the whole partition to another drive and then ...
0
votes
2answers
264 views

Delete and merge Partition

My MacBook's HDD has 2 partitions. One has OS X 10.8 installed, the other one 10.9. I'd like to delete the first partition and merge the free space afterwards to the 2nd partition. What's the easiest ...
0
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3answers
2k views

Unable to eject or erase USB drives

I'm unable to eject USB drives. When I try, I get this error: The disk "Untitled" wasn't ejected because one or more programs may be using it. To eject the disk immediately, click the Force ...
0
votes
1answer
334 views

How to unmount a locked volume?

Sometimes, a volume refuses to eject because some program is using them. Sadly, Finder doesn't give the identity nor gives a way to solve the problem. So, how do you solve this problem in a clean ...
1
vote
1answer
375 views

iMac restart issue

I've got a 21.5", late 2011 iMac which has been acting up lately: after a normal shutdown, the computer would hang at the Apple logo, with the spinning 'loading' wheel below it. I managed to fix this ...
4
votes
2answers
17k views

installation stuck in a loop due to damaged HD

Right off the bat I'll admit it was stupid to jump into trying to install a new version of OS X to the only partition without having taken adequate precautions (no backups or recovery disks), but ...
0
votes
0answers
272 views

Is Kext Utility a safe utility to use?

I've download Kext Utility from this site and I wonder if it is a safe utility to use and if there are any case of damage after using it. I have to install PS/2 driver in my Mountain Lion for using a ...
0
votes
0answers
311 views

Disk Utility won't let me partition a disk

I'm trying to add a partition to my Macintosh HD using Disk Utility. However, whenever I try to do so, I get "the target disk is too small." I'm using OS X 10.8.5 on a Retina MBP, and there would be ...
2
votes
3answers
6k views

Can't change folder permissions

I'm running Mountain Lion and I have a folder in ~/sites that has a red icon on the folder and I can't open it because 'access is denied'. What I've tried: Get Info > unlock with admin password, ...
2
votes
2answers
1k views

What is the real working method of making a bootable usb drive?

Always when I need to make a bootable usb drive on a mac I struggle, I end up switching to windows because none of the below works for me, I'm using MacBook Pro: running sudo dd if=Debian.is ...
0
votes
1answer
145 views

Expanding a partition at the end of a drive to fill the entire drive

I have an external HDD connected to a Lion iMac (though I can use my Mountain Lion Air if it will make the process simpler) that was split right down the middle with two partitions. The first was ...
2
votes
1answer
186 views

Very strange partition table: Missing a sector between Main and Recovery partition

So I have been trying to get Windows 7 on my machine using no DVD or USB (I have only an ISO to work with). I used various combinations of Boot Camp, Toast Titanium, Virtualbox / VMWare, Disk Utility, ...
2
votes
0answers
103 views

Broken FileVault Drive

I'm coming to you having a few issues with my old hard drive. Basically, my MacBook crashed a few days ago. It seems like my disk has some bad sectors and has started a kind of autodestruction ...
1
vote
3answers
430 views

For bad and/or marginal blocks on hard disks, can anything be more effective than a single pass of zeros?

There's a good discussion in Apple Support Communities – Disk Utility: for bad blocks on hard disks, are seven overwrites any more effective than a single pass of zeros? (2011-04-21) A highlight: ...
7
votes
2answers
4k views

hdiutil convert/rsize resource temporarily unavailable

When trying to convert or resize a dmg image I get the error: hdiutil: convert failed Resource Temporarily Unavailable error or hdiutil: resize: failed. Resource temporarily unavailable (35). ...
1
vote
1answer
390 views

RAID 1 with a Mac - how to avoid formatting one of the drives

I have an iMac with an external 2TB HDD. I recently bought a second 2TB HDD in order to build a RAID 1 (mirrored) with the two drives. The problem is that Disk Utility forces me to create a new RAID ...
2
votes
1answer
88 views

How can I wipe an encrypted volume when the password is forgotten?

I have encrypted disk volume that is in the way and the passphrase is gone. How can I erase the contents and reuse the disk space?
0
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0answers
55 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 ...
1
vote
1answer
798 views

How to reformat the latest iMac?

I need to reformat my work mac. My boss bought it about a month ago, so it's one of the newer ones that didn't come with an installation disc. It's running mountain lion and has a bluetooth keyboard ...
1
vote
1answer
188 views

Seagate 4TB, 3,5" / SATA III (ST4000DM000) and SK-3500 Super-S Combo

I bought a 4TB 3.5", SATA III Seagate Desktop HD and put it into a SK-3500 Super-S Combo. My iMac (late 2009) did, however, not detect the HD when I connect it. Since I cannot see it, I am unable to ...
4
votes
2answers
4k views

How do I recover an “invisible” OS X boot option in BootCamp (running on a 2013 MBA)?

Summary Unable to boot into the OS X partition of a 2013 MBA which dual-boots OS X and Windows 8 via BootCamp. Could "Repairing Disk" via "Disk Utility" damage the working Windows 8 partition? What ...
1
vote
1answer
378 views

Safely destroying Apple Software RAID 1

If an Apple Software RAID (RAID 1, mirrored) exists and one of its members is failed. It is possible to destroy the RAID and keep the data on the functional disk intact? If so, how is this ...
2
votes
0answers
433 views

Time Machine and case-sensitive HFS

Time Machine defaults to formatting a new drive to Journaled HFS+ (case-sensitive), if you set up the drive from within Time Machine itself. However, my main drive (the one Time Machine will be ...
3
votes
2answers
835 views

SSD reporting incorrect amount of free space, not due to local snapshots

I recently created a file of just over 20GB and then deleted it shortly after, however my free space did not increase at all. I am using a 2012 MacBook Air with a 128GB SSD and I've had problems ...
1
vote
2answers
443 views

Repartitioning after Bootcamp problems

When I first got my MacBook Pro, I installed Windows 7 via Boot Camp. A couple months later I wanted to install Ubuntu and have a triple boot. I followed this tutorial: triple-boot After I finished ...
0
votes
1answer
171 views

How do I Create a Macro or Shortcut to run a Command Sequence Terminal

The following was posted as an answer to a question of read/write difficulties on NTFS drive which worked perfectly. Thanks Codler. My question is, is there a way for a noob like me to create a ...
0
votes
1answer
295 views

AppleRAID 0+1 failure: [corestorage] LVG missing and cannot repair mirror

I just recently created a corestorage LVG and an encrypted volume that used an AppleRAID 0+1 array, but something has gone horribly wrong. I had four 1TB disks, and created two 2TB stripes, cbs1 and ...
2
votes
1answer
134 views

Editing Partition

When trying to edit a partition on my hard drive, Disk Utility says: Couldn't modify partition map because the file system verification failed. So I booted into single-user mode and typed in: ...
1
vote
1answer
97 views

I can't boot into single user mode

A while back I partitioned my hard drive into two equal parts. I completely forgot about it and then realized that I only had half of my original drive space available. I startup disk utility and ...
3
votes
1answer
3k views

Unable to read last block of the device

I'm mid way through replacing the hard drive in my MacBook Pro (mid-2009). I've created a boot disk (10.8) on a SD card which I am booting from. On trying to format the new drive with disk utility ...
3
votes
1answer
110 views

Does using “rm” command cause journaling corruption?

Some time ago I had some problems with my Mac drive, so I went to the recovery partition and used Disk Utility to check for problems. It reported a huge discrepancy between the journaled free blocks ...
0
votes
1answer
842 views

Is it safe to reformat drive during Recovery Mode install?

I've inherited an almost brand new 13" Macbook Pro Retina. I'd like wipe the hard drive clean and start with a fresh install of Mountain Lion. I've done this a million times before... but never while ...
3
votes
1answer
475 views

In Disk Utility, what advantages do “read/write disk image”s have over “sparse bundle disk image”s?

If I want a read/write disk image, then aren't sparse bundle disk images always the way to go? They start at 0 kb in size, and grow to accommodate whatever you add to them, and if you delete stuff, ...
0
votes
1answer
158 views

How do I copy an NTFS partition to a writable disk image?

I have a drive from an old Windows computer. The drive is now in an enclosure, so it's accessible as if it were an external drive. It is formatted as NTFS. I would like to convert this drive (about 50 ...
0
votes
1answer
314 views

Merge two disks to RAID 0 and keep my installation

I've got two 128Gb SSDs installed in my MacBook Pro. Originally I had one for the system (named Calcium), and one for the /Users folder, symlinked into the first (named Users). As I ran out of space ...
0
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0answers
19 views

Password Protecting Folders in OS X? [duplicate]

What methods exist (either inbuilt or via third party) to password protect (encrypt) folders within OS X ?
2
votes
1answer
287 views

Is my SATA cable damaged?

Macbook Pro Mid 2012, original SSD. TLDR; Why could I clone my unmountable drive from an external enclosure but not internally? My SSD broke down a few days ago. It was detected, but I was unable to ...
1
vote
1answer
209 views

When creating a RAID 1 mirror set, do you need to have both disks available or can one be added later?

I'm planning my transition to Mac OS and I have a pair of mirrored drives I would like to move to my future computer. Since they are currently formatted as NTFS they will need to be reformatted during ...
6
votes
3answers
6k views

Creating boot disk for Windows 7 on MacBook Pro

EDIT: I gave in and burned the DVD from a windows PC and I was able to install Windows on my MacBook Pro with Bootcamp. Sorry, that I don't have a satisfying solution. My goal is to install Windows 7 ...
1
vote
0answers
146 views

Increased the Size of Bootcamp Partition but Winclone Restores Old Size Partition

I followed all documented steps to increase the Bootcamp partition size on the Mac OS 10.5.x. I used Winclone, Disk Utility and Bootcamp Assistant to perform this operation. In short, I cloned Windows ...