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

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51 views

Disk image of OS + Recovery partition?

I'm working with multiple OS X versions frequently and I'd like to have an image which contains a particular OS version's system partition and its recovery partition. Is this possible? (the disk where ...
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40 views

“Your startup disk is almost full.” message appears but the available space is ~60G

I have enough available space as shown in the attached image but the message "Your startup disk is almost full." appears when I save files. Also my MacBook Air is slow and buffering when I print a ...
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1answer
90 views

How can I fix Error: -69877: Couldn't open device after interrupted formatting process?

This question, possibly the same question, has been asked: Couldn't open device However, my question hopefully demonstrates a more specific scenario as the situation in which caused the error ...
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2answers
164 views

How to fix Mac hard drive partition showing as Fdsik_partition_scheme

My situation seems very similar to how to fix GUID hard drive corrupted to MBR but with enough differences that I haven't been able to put together a confident solution. I have a 3TB Toshiba drive in ...
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33 views

Cannot Repair Macintosh HD, after loading into OSX, it become a [X]

When i restart the computer and loading with the apple logo, wait for few second, and the apple icon become [x] My Mac is OSX EL Capitan (v10.11.3) I used Disk Utility "First Aid" and found that ...
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1answer
78 views

OS X 10.11 Disk Utility, encrypted dmg password and keychain

In previous versions of Disk Utility there were checkboxes whether to store the password in the keychain or not while creating an encrypted dmg image. Now there are less options. Does the new version ...
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1answer
138 views

Unmounted hard drive times out ejecting or mounting

I have a Drobo connected via Firewire to my MBP which is causing me some issues. Here is the diskutil info: Device Identifier: disk2s2 Device Node: /dev/disk2s2 Whole: ...
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25 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 ...
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28 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 ...
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32 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 ...
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1answer
68 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: / ...
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1answer
34 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 ...
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1answer
48 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 ...
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2answers
45 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 ...
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1answer
60 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 ...
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0answers
22 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 ...
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0answers
20 views

Might have spoiled the flash drive while trying to create a bootable disk on Yosemite

Basically I was following the steps given in the following site: How to create a bootable USB stick on OS X I did not get a screenshot of the terminal, but when going through step 8, it was ...
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1answer
28 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 ...
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0answers
266 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, ...
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1answer
81 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. ...
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49 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 ...
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1answer
167 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 ...
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1answer
52 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?
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43 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 ...
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1answer
22 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 ...
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1answer
122 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 ...
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1answer
108 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 ...
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26 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 ? ...
4
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1answer
125 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 ...
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1answer
100 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 ...
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1answer
456 views

Couldn't open device

I can not partition nor use a removable USB disk without file system. I obtained the following informations: sh-3.2# diskutil info disk2 Device Identifier: disk2 Device Node: ...
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2answers
47 views

Missing disk space after repartitioning

I tried to make a partition and then tried to undo it. Now, I don't know how to get the missing disk space back. As you can tell, I have 751.28 GB disk. Macintosh HD and Recovery HD have 557.4 GB. ...
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1answer
123 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 ...
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1answer
93 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. ...
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143 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. ...
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19 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 ...
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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 ...
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35 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, ...
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1answer
57 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 ...
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1answer
32 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 ...
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0answers
222 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 ...
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0answers
14 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.
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2answers
106 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 ...
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2answers
66 views

Prohibited sign - Can't boot after trying to open Raspian SD Card

So I was following this tutorial https://www.youtube.com/watch?v=Eo4HphBdR10 and opened the folder of the SD Card. The Screen went black and I rebooted. Now I get a Prohibited Sign on boot up. In ...
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1answer
84 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 ...
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2answers
196 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 ...
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33 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 ...
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2answers
230 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 ...
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0answers
90 views

How to recover corrupted HFS+ partition in external HD?

I've got a 1 TB SeaGate FreeAgent Drive with following partitions: 700 GB ExFAT (labelled as FREEAGENT1) 300 GB HFS+ (labelled as FREEAGENT2) While moving data from 1 to 2, it got accidentally ...
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0answers
108 views

Time Machine Backup Failing with Error 11

I've been trying to run a Time Machine backup for the last couple of days (OSX 10.7.5 and Porsche LaCie 2TB); however, it has been constantly failing. Console is producing the following crash messages ...