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

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7
votes
2answers
68k 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 ...
2
votes
1answer
17k views

Disk Utility message “Updating boot support partitions for the volume as required”

Finder crashed on a external drive which caused an abrupt eject. I rand Disk Utility over the drive and the operation finished with the message: Updating boot support partitions for the volume as ...
0
votes
4answers
14k views

External HDD can be seen in Disk Utility but not in Finder

I've been using my external HDD a lot of times before on my Macbook Pro 13" OS X version 10.9.5, but it doesn't seem to appear in my Finder anymore. It can be seen in Disk Utility, though. Can anyone ...
0
votes
0answers
47 views

Drive stays mounted for just a couple of seconds

I have an externa WD My Passport Pro disk configured as two individual 2 TB disks. After I erase it (Journaled, Encrypted, Case insensitive) it is mounted and immediately unmounted. Disk Utilities ...
1
vote
0answers
30 views

Can a Standard User format an encrypted drive?

I have recently partitioned my drive into a trap OS. If my Macbook is stolen I want to give the users access to use the device to increase the chances they will connect it to the internet and I can ...
1
vote
0answers
39 views

Cannot resize OS X startup parting (both diskutil and Disk Utility GUI freeze)

I'm trying to shrink my Yosemite partition and create a new one. Trouble is that the Disk Utility gets stuck "Preparing to partition disk" (same thing when run in recovery), and diskutil in a ...
1
vote
1answer
277 views

Why did an “Untitled” partition appear that uses up half the disc space and how do I get rid of it?

On a Mac OS X Server, I realized today that the 1TB disk has all of the sudden two partitions, both of them around 500GB large: 1TB APPLE HDD ST1000LM024 Macintosh HD2: Mount Point: / ...
0
votes
1answer
45 views

Force Finder and Trash to stop using external drive so Disk Utility can erase

I want to reformat an external disk, but in Disk Utility "Partition" is grayed out and when I click Erase it says it cannot unmount the drive. I think Finder is not allowing the disk to be unmounted ...
0
votes
1answer
191 views

Add/Delete/Modify files within a Disk Image (.dmg)?

I know this may stem from a fundamental misunderstanding of the way disk images are intended to work, but even when full permissions are granted on a .dmg file, I am unable to add or remove files on ...
1
vote
2answers
57 views

Creating partition on USB drive

I have been following directions to create a bootable USB drive from here: http://borgstrom.ca/2010/10/14/os-x-bootable-usb.html Here is the relevant screenshot: However for my case on the USB ...
0
votes
1answer
100 views

How to partition 128 MB space on El Capitan?

I'm trying to dual boot Ubuntu with El Captain MacBook Pro mid 2012 following this guide: How to Dual-Boot OS X and Ubuntu I want to partition a 128 MB space called Ubuntu Boot Loader along side my ...
0
votes
0answers
26 views

Can I make my external drive stop being busy so I can repair it?

I have an external drive that shows up in Finder (Yosemite -- 10.10.5) with it's top-level folders visible and correctly named, but the folders are shown as empty even though the drive shows the ...
2
votes
1answer
455 views

Repair an exFAT drive on Mac OS X after it's been improperly disconnected

Very often an exFAT external disk stops appearing in OS X. It doesn't appear in Disk Utility, Finder, diskutil list or About this Mac/System Report/USB. The only way I have found to fix it is to boot ...
1
vote
1answer
91 views

How do I format a usb drive on a PC or Mac?

I have a USB drive that was formatted for a Mac and now I want to use it for a PC. How can I do to make it?
1
vote
1answer
77 views

Internal (Apple SSD) hard drive problem

I'm having terrible issues with my Mac since I tried to restore the entire system from a Time Machine backup, which ended up showing a "an error occurred while adding a recovery system to the ...
0
votes
1answer
242 views

How to increase Macintosh-HD main drive partition size?

In my mac mini, It’s containt 500 GB HDD. It is a four partition and size described below. Please review below attached image. 1. Macintosh HD - 150 GB Main Drive 2. D-Drive - 125 GB 3. ...
3
votes
6answers
17k views

Unable to mount Time Machine partition

I have a WD external HDD which is plugged into my MacBook Air more or less all the time; it has two partitions one of which is my Time Machine disk. Just today I noticed that the hard drive is not ...
1
vote
0answers
558 views

an error occurred while adding a recovery system to the destination disk

I have a late 2013 retina macbook pro that came up with OS X mavericks. I have tried to restore my macintosh hard drive from timemachine backup, I followed these steps: rebooted mac holding cmd+R, ...
0
votes
2answers
3k views

Can't restore Time Machine backup to Macintosh HD

Today I found my Mac shut down. It won't boot again anymore. When I try to turn it on, it just shows the Apple logo, a loading bar and after 1/3 progress it just shuts down again. After some research ...
0
votes
2answers
346 views

Why do I have /Volumes/Storage Drive?

In Terminal, I noticed I have /Volumes/Storage Drive. On my mac, I have no drive named Storage Drive. Furthermore, no Storage Drive appears in Finder or Disk Utility. When I cd inside Storage Drive ...
1
vote
1answer
186 views

Fusion Drive lost space after bootcamp-fail. resizeStack throws an error. What can I do?

I have a 2 TB Fusion Drive in a 5K iMac (Late 2015). Two days ago, I started the bootcamp assistant to create a partition for Windows 10. It got stuck (let it run 30 minutes), however, which forced me ...
6
votes
5answers
20k views

“Couldn’t create temporary file.” error when erasing free space on external disk

I was trying to wipe the free space of an external USB 3.0 disk in OS X (Yosemite) disk utility. However, I receive the following error: EDIT: The disk is formatted as GUID / Mac OS Extended (...
0
votes
0answers
58 views

Need help fixing hard disk partition map

I have a 500GB Samsung 840 PRO SSD drive. Until recently it was the primary hard disk in my Macbook Pro (late 2011 17"). I got a 1TB SSD which I decided to use as my primary drive instead, and put the ...
0
votes
1answer
62 views

How to partition a pen drive with Disk Utility in El Capitan?

I've a 16 GB pen drive and I want to partition it like this: two MBR partitions: FAT - 1GB default (HFS Plus journaled) - remaining. How to do this in El Capitan?
4
votes
1answer
280 views

Remove Ubuntu and grow Mac partition

I'm new to the whole Mac world, and the first thing I did when I got my MacBook Air 2015 was I installed Ubuntu, but have regretted it now and want to remove it and get my space back into the Mac ...
0
votes
0answers
57 views

Delete button for partition not clickable in Disk Utility

I had another partition on my MacBook where I had Windows installed (the partition is called BOOTCAMP). I am not using Windows at all any more, so I would like to delete the partition on my hard disk ...
0
votes
1answer
24 views

Formatting mac and encrypted memory

Currently I have a 128GB SD for data in my macbook, but is encrypted using utility. If I format my mac, the stored key will be gone. How can I do this safely? Is there any way to do this without ...
1
vote
1answer
231 views

Cannot use Disk Utility to create partition from free space on external USB drive

I have a 3 TB Western Digital red disk in a USB hard drive dock. The drive is GPT, and I have two volumes on it (one volume is "Microsoft Reserved", other volume is NTFS). The other part of my drive ...
1
vote
0answers
54 views

Can not resize disk image file .dmg

I've found that OS X supports .img files which might be resized after it was created. Interesting thing is I can not resize more than 1 time :) is it real limitation or I'm doing something wrong ? I'...
0
votes
1answer
139 views

Why can't I format my blank SSD from OSX Recovery?

The SSD in my Macbook Pro died suddenly. I bought a blank one, installed it as the internal drive, and booted into recovery mode by holding Command + R. After letting it connect to WiFi and download ...
3
votes
1answer
177 views

Accidentaly converted from a basic disk to a dynamic one

I got a MacBook Pro (13-inch late 2013 retina) So I installed Windows 7 using bootcamp and all was fine. I then needed to create a 32MB FAT16 partition, when Windows prompted me to convert to a ...
1
vote
2answers
206 views

Fusion drive is not working although the system can find the SSD

I own an iMac late 2013 with a fusion drive. Recently I installed Windows 8.1 using Bootcamp on a separate partition on my disk. After a few days, the booting process of OS X started failing and I had ...
0
votes
2answers
864 views

Cannot format SSD in optical bay

I tried to install a new SSD with higher capacity in the optical bay. But OS X cannot format the SSD. I also tried to swap with an HDD but same problem with HDD. Failure format or something like this. ...
1
vote
1answer
138 views

Disk utility won't let me use the restore option to get a .dmg image onto a USB

I'm tying to make a bootable Debian USB drive. All I need to do is restore the USB drive from the Debian dmg. I get this error. The debian.org documentation is not helpful with this specific issue. ...
0
votes
0answers
300 views

Can't make new partition due to error “volume Macintosh HD was found corrupt and needs to be repaired”

When I run Disk Utility on my 2012 MBP (SSD, running El Capitan) I sometimes get the error: The volume Macintosh HD was found corrupt and needs to be repaired. Other times, I get no errors. ...
0
votes
0answers
22 views

El Captain Partition removal won't work

I want to remove a partition but the disk utility won't let me and I can't figure out why. Here is the terminal output I want to remove the untitled partition I have created a backup... If I start ...
0
votes
1answer
24 views

Copy not possible from ssd to another ssd

We want to move 30GB of data located on a 128GB ssd to another 120gb ssd. This is not possible as disk utility says that /dev/disk2s2 doesn't have enough space. The data we want to copy is os x ...
0
votes
1answer
87 views

Disk utility will not allow me to resize a partition on an unencrypted external hard drive

I want to back up a copy of Windows onto a new partition of external hard drive currently formatted in exFAT. I don't know how to use Windows, so I want to use my Mac (mid-2009 MacBook Pro, running ...
0
votes
0answers
43 views

Regain access to OR get rid of Windows, Linux partitions

(Note: this question is regarding an early 2015 MacBook Air (256 GB 2.2 GHz) running OS X Yosemite 10.10.3) I have happily been running my laptop dual booted with windows - installed as 8.1 Pro, ...
1
vote
1answer
43 views

How to image USB drives without having OS X mount them afterwards

I am using OS X to write USB drives. I have a disk image and am using dd to the raw device to create the drive image. The problem I'm having is that OS X is automatically mounting the drives as soon ...
0
votes
0answers
346 views

Reclaim unallocated disk space on El Capitan?

So I decided to dual boot Ubuntu and OS X using rEFInd a few month ago. I originally partitioned about 15 gigs for Ubuntu, but I later decided I didn't need that much space. I used a live stick to run ...
0
votes
0answers
17 views

Mount dmg at a specified path

IS there a way to mount a particular dmg at a specified path. I don't want to mount it at /Volumes; just testing something.
2
votes
1answer
38 views

Large (800 GB) Disk Image on Time Capsule as pseudo-NAS?

I am considering getting a new Time Capsule (2TB) as a basic/pseudo NAS, in addition to a target for Time Machine for two macs. My macs each have a 500 GB ssd. Neither are currently even half full, ...
2
votes
1answer
696 views

Can't delete Logical Volume Group on Fusion drive

I have a 2014 iMac Retina running OS X Yosemite and a 3TB Fusion drive. I am attempting to restore it from a Time Machine backup, but when I try to do so, I get the error message, "The disk can't be ...
0
votes
1answer
133 views

How can I encrypt a disk where diskutil cs convert reports “a problem”, leaves disk unreadable?

I'm trying to encrypt my Time Machine backup volume, but diskutil refuses, and leaves the disk unreadable (but repairable using Linux). How can I proceed? It's a Western Digital Elements 107C 3TB ...
-1
votes
1answer
71 views

Modifying bootcamp (link include) - Error when writing Iso on USB stick

Thank you for your tutorial for modifying bootcamp for Early 2008 MacBook Pro... Bootcamp - No ISO Option On my side, modifying Bootcamp to add the new option have worked perfectly, but i always got ...
1
vote
2answers
471 views

Disk utility detecting error in single user mode, but not when disk utility is opened via recovery mode

I verified the integrity of my Macintosh HD (MacBook Pro 13" 2012, OS X Yosemite) with Disk Utility when I was logged in as a user and it reported this problem: Invalid volume free block count ...
0
votes
2answers
404 views

Unsuccessful attempt to repair permissions with OnyX on El Capitan

I'm trying to execute the maintenance script in OnyX and I keep on getting the same errors at each pass: Permissions in the X11 folder are constantly being repaid (i.e. OnyX is showing that it ...
1
vote
0answers
34 views

Rsync for backups

I have gotten into the habit of using rsync to do my own backups of an encrypted volume containing my personal info onto an external hard drive. I did not use Time Machine, because I do not own the ...
2
votes
1answer
697 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 ...