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

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Bootcamp system operating missing error after resizing partition

I resized my partition to increase my bootcamp drive few months ago on Disk Utility on Mac and after that I decieded to have more space on Bootcamp partition so I resized it again by set new size for ...
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1answer
165 views

Disk Utility reports “missing thread record” on my external HDD

I have an external 500 GB HDD that's about five years old. I just turned it on and it made a bunch of clicking noises and failed to spin up immediately, though it did so after a few seconds. To be ...
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1answer
203 views

Is SDHC Card compatible with a MBP mid-2009?

I have a Mac Book Pro, mid-2009 model that has a SD card slot. I just bought a SD Card from SanDisk, 8gb, SDHC. When I insert the SD card in the slot, it is recognized by the MBP: I have a new icon ...
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2answers
3k views

Replace a failed disk in a Disk Utility RAID 1

I have LaCie 2big thunderbolt 2-disk device configured as a RAID1 from Disk Utility. One of the drives appears as "failed", so I unmounted the raid, replaced the drive and plugged it all back in. Now ...
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1answer
441 views

Can't mount primary HD, Disk Utility shows Invalid Node Tree Size

There are similar lines of questioning in the forum, but few valid responses. Apologies for reposting. I've searched for hours on end... I'm a tech consultant (software, not hw) helping my relative ...
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7answers
7k views

Partitioning secondary internal hard drive failure

Looks like my 2nd HDD became a brick. I tried to partition it via Disk Utilities/booted from recovery partition/diskutil to no luck! I got vague/strange errors such as: unable to unmount, or: ...
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1answer
21 views

Encrypt backups

Is it better to encrypt the hard drive you will use for Time Machine backup with Disk Utility or with Time Machine itself? I have noticed the the dialogue is slightly different, wherein Disk Utility a ...
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1answer
643 views

Move of time machine backup: unable to “restore”

I want to use a new hard drive for time machine. I try to restore the old backup into the new disk using disk utility. It fails with the following error : source volume is read-write and cannot be ...
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1answer
43 views

Can one slice of a “Disk Utility” RAID mirror be moved to a new computer?

With a 2-disk RAID mirror created in Disk Utility, after one disk fails, can the remaining good disk be moved to a different Mac and used successfully?
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2answers
821 views

Which format for external disk for performance?

I'm using OS X Mavericks and just got a new external hard disk. I don't need to share it with a PC (so no need for FAT) but I do want it to have better I/O performance. I'm a bit confused by the ...
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2answers
168 views

Repair or reinstall Mac partition

I have a hard drive that is having problems on a Mac that doesn't use Time Machine or another complete backup system. I get this error when trying to repair the disk: Error: Disk Utility can’t ...
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1answer
626 views

External Hard disk 500 GB free but can't copy 8 GB data

I have WD external hard disk, which was working fine. Its MS-DOS formatted. I have downloaded a file in .mkv, which works fine, and isn't corrupted. Upon copying the 8 gb file, it says "The file is ...
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2answers
112 views

How do I remount USB Flash Drive or SD card?

I noticed that I could remount my USB hard drive through terminal after I eject it by typing diskutil list to find the drive and diskutil mountDisk /dev/disk"X"... So I tried to do the same with my ...
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1answer
87 views

Disk Utility does not show OK message after Verify Disk

Rebooted and Verified Disk twice. There is no OK message and stops here: Is it a new behaviour under Mavericks, or something wrong? How can I fix it?
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1answer
631 views

How to delete partition disk0s4?

A while ago, I dual booted with ubuntu linux and followed a tutorial on youtube to do so, but later I wanted all of my hard drive to be for osx, so I deleted the ubuntu partition, but now I am left ...
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0answers
93 views

Oops, I broke my MBR, what do I do?

I installed Mavericks a couple weeks ago and discovered to my dismay that last night, I couldn't boot into my windows install via bootcamp. I'd encountered this problem before, and without entirely ...
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0answers
59 views

Why does the diskutil shows I have two local hard drives?

I was trying to get my NTFS drive to work today and I discovered that the diskutil thinks I have two local hard drive. This phenomenon is not occurred on my Macbook Pro. Do anyone know why? Here is ...
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9answers
16k views

Macbook HD “Other” all the Sudden Almost Full

As you can see in the below image, my HD "Other" category is almost full. A couple of days ago, I randomly kept getting a popup saying that my disk was almost full. Then I went in and noticed the ...
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0answers
163 views

Mounting SMB network share from Mavericks recovery mode

I would like to be able back up my macbook on a weekly basis doing the following: boot into recovery mode mount a windows SMB network share use disk utility to save a disk image to the network share ...
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1answer
201 views

How to restore Applications & Files from HD Backup (Migration Asst won't read it)

I recently had a problem with my MBP which wouldn't start up. After the chime it would shut down. I started using ⌘ cmd+R and ran Disk Utility. Had issues with my boot partition but no issues on my ...
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2answers
14k views

What are next steps when fsck reports “could not be repaired after 3 attempts”?

My Mac Book Pro 13.-" doesn´t get past the grey booting screen with the apple and the spinning wheel (The loading bar appears but when it´s done nothing happens) I have 220 GB in one single ...
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0answers
75 views

Disable auto mounting drive in OS X

I have two hard drives inside my MacBook, and I only want one to be auto-mounted at boot. I'm running OS X 10.7.5. I tried creating /etc/fstab with this line: ...
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1answer
516 views

Can't format 2nd HDD in optical bay on Mid-2012 Macbook Pro 13

I have recently bought an SSD and a HDD caddy to do a SSD+HDD setup. After installing, I can't format or reliably use my HDD while it's in the optical bay. I installed the SSD in the place of the ...
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1answer
989 views

How to reformat/install new SSD on MBP late2010 using OS X Internet Recovery

I had been saving some money to buy an SSD and finally I did. My old HDDs motor shut down so I had to replace it. I put it in the macbook all good but it isnt recognized by the system as a hard drive ...
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0answers
31 views

Equivalents for genisoimage and qemu-img on Ubuntu

How do I achieve the same result on OS X 10.9 as I do on Ubuntu with commands: $ genisoimage -output init.iso -volid cidata -joliet -rock user-data meta-data and $ qemu-img convert -O raw disk.img ...
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1answer
913 views

Disk Utility stuck around 50% when formatting SSD

I bought a SSD drive for my early MacbookPro 2011, since my old HDD was very slow and with crazy IO activity when idle. I started the Internet Recovery Mode and opened the Disk Utility to format the ...
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1answer
30 views

What does it mean when Repair Disk takes just a few seconds to complete?

I have the flashing finder icon problem. When I boot from DVD, I cannot choose the disk as Startup Disk. However, it appears in Disk Utility. When I run Repair Disk I can see the disk, and that it has ...
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2answers
564 views

Can I make an OS X ESD (or other USB drive) read-only?

I have a USB Flash drive onto which I've used Disk Utility to restore the Mac OS X Install ESD: Is there a way I can make the result read-only, in order offer it at lease some semblance of ...
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1answer
54 views

Backing up files from corrupt disk from Windows Bootcamp

So, mysteriously with no previous bad behavior my computer stopped booting, stuck in the gray loading bar cycle and then shutting down, the problem I believe wasn't obvious at first. I booted to ...
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1answer
52 views

Can OS X Combine Physical Disks

I have OSX Server 10.5.8 installed on a drive and I would like to combine 2 USB drives together to act as one drive. Is that possible?
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1answer
216 views

Enlarge Mac OSX disk

How can I enlarge my start up partition? I cannot drag the MAC OSX box (see below)
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2answers
1k views

Disk needs repaired… but it doesn't?

I've been noticing some oddities with my computer lately. Applications running slower than normal. Hanging. I decide to run Disk Utility and I get the following statement: So I do what it says and ...
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0answers
46 views

Can't accees a NAS (LaCie type) external drive after booting from a USB

I would like to make a dmg image of my drive and store it in a NAS drive - one that is accessed only via the local network. When working normally, I can access the drive, but I am not allowed by the ...
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1answer
3k views

How to recover my harddrive if I can't see it in the disk utility

I have a 2007 aluminium iMac which I upgraded months ago to Mavericks. Today it locked up and I held the power button to shut it down and cannot get it to start again. I get the flashing folder ? icon ...
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2answers
91 views

Which drive to I select to completely erase my system's hard drive?

Apple's instructions for completely erasing a system say to "select your startup disk". But my system shows a hardware drive icon and some gobbledygook as a name, and under that another icon and name ...
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0answers
58 views

Diagnose if corrupted volume is due to hardware problem

This morning when turning on a Mac laptop, it suddenly announced that an external backup disk (which was connected overnight) "can't be repaired". Disk Utility also says: Disk Utility can’t ...
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1answer
95 views

Cannot boot Mac Mini with stripped RAID -fsck hangs

Today we coould not get one of our machines running. After several hours of doing the 'standard' tasks like fixing permissions etc. we hit a dead end. Here's what's going on: Machine starts, we can ...
2
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1answer
2k views

partition map check failed because no slices were found

I own an early 2011 MacBook Pro running Mac OS X Mavericks. Recently, I tried to make 50 GB partition using Disk Utility but the whole process didn't complete, and I had to restart the system as it ...
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2answers
31k views

How can I delete everything from my MacBook Pro before selling it?

I have a Mac that runs Snow Leopard and I intend to upgrade it to Mountain Lion and sell it on ebay. However, I only have one hard-drive, and I'm sure I can't use something in my OS to delete my OS ...
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0answers
96 views

Files seem corrupted after transfer from usb drive

I recently switched Macbook so I transferred the files from my backup to my new computer, but it seems most of the files are corrupted. A few mp4 files aren't corrupted but everything else is! ...
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2answers
234 views

Can't resize main partition even in G-Parted

So I had an old partition that I deleted, and now moved all my stuff to the new one. Now I am out of space, and I want to resize it to fill the whole hard drive. But Disk Utility wouldn't let me ...
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0answers
33 views

Can I enlarge a RAID10 with Disk Utility?

I have a 4TB RAID10 (4x2TB disks) created with Disk Utility. I also have 4x4TB spare disks. Can I enlarge the RAID10 to 8TB (4x4TB)? This post suggests that I can break each mirrored set, and ...
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2answers
105 views

Cannot erase and reformat Mt Lion on Mac Book Pro

I am trying to erase and reformat my mac book pro. It has mt lion installed already. I have a usb w mt lion ready to go. When I go through the erase steps in the disk utility, the erase button ...
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1answer
783 views

How do I erase partitions on a drive that's been protected with FileVault 2?

I want to completely wipe a USB thumb drive, re-partition it, and reformat the partition as ExFAT, not JHFS+. Unfortunately, I used FileVault 2 on it when I made it and that seems to be preventing me ...
2
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1answer
4k views

Do persistently incorrect disk permissions indicate a disk should be replaced?

Something is wrong with my Mac, as indicated (and still unresolved) in the question: What is the Sixth Step of MacBook Repair? One possibility is that the main disk is faulty. Disk Utility reports ...
2
votes
1answer
5k views

How can I modify a DVD image (ISO) and then burn a new DVD?

I have a (legit) copy of Star Wars Battlefront 1 for the Play Station 2 (PS2). There are game mods available (different character skins etc) that I'd like to try. Apparently this can be done but I'm ...
2
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1answer
4k views

Restoring an SD card using a multi-partitioned DMG

I have a linux distribution that I installed on an SD card. After the lengthy installation was finished I created a DMG backup of all the partitions using the Mac's built in disk utility. The recovery ...
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3answers
836 views

Write .iso to USB on Mountain Lion [closed]

I'm trying to create a bootable USB for Windows using Disk Utility on OS X 10.8.4. Downloaded CentOS 6 for 32-bit and tried to use Disk Utility to create a bootable USB drive. This method failed with ...
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2answers
514 views

CoreStorage: what does LVG status 'offline' and PV status 'checking' mean and how can it be fixed?

I converted a partition to a CoreStorage volume using this command: sudo diskutil cs convert disk0s2 -passphrase test123 Now when I run `diskutil cs list' the output shows that I still only have a ...
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1answer
678 views

Can I “restore” an iso image to my hdd to be bootable?

I removed my superdrive a while back but now I want to install a linux partition on my macbook. I installed rEFInd as my boot manager but now I need to boot into the arch linux iso. Normally I would ...