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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1answer
80 views

How to format a Seagate HDD to OS X Extended (Journal) with Disk Utility

I have just got a new external hard disk, the Seagate Expansion 2 TB, and I am trying to format it to work on my Mac. I was told that I had to erase the disk and format it to OS X Extended (Journal) ...
1
vote
1answer
256 views

Not enough free space on OS X Base System while installing El Capitan with VirtualBox

I am getting an error while installing OS on Virtual Box machine, that there is not enough free space as shown in the image. I allocated 20GB while setting up virtual machine, and 8.8GB is what apple ...
1
vote
2answers
615 views

How do I pass the following error message in the Boot Camp Assistant: “Please format the USB drive as single FAT partition.”?

I am running the Boot Camp Assistant on El Capitan. Whenever I reach the third screen, titled "Save Windows Support Software", on which I can select an storage medium to save the Windows support ...
1
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1answer
29 views

OS X Disk Utility shows more data

On OS X El Capitan Disk Utility shows me that I have 48 GB Movies, but I don't have this films really. Where can I find these movies that shows Disk Utility?
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0answers
95 views

Lost disk space after boot camp

The title is self explanatory, I lost disk space after a fatal Boot Camp manipulation. I deleted the Boot Camp partition, I did a fdisk -fy command and I ended with ~50 GB of unallocated disk space. ...
2
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0answers
11 views

Manually copy .ISO to bootable USB (without Bootcamp) [duplicate]

I want to create a bootable Windows USB from my Macbook manually as an alternative to Bootcamp. I've downloaded the Windows 10 ISO file. Formatted an 8GB USB with MS-DOS(FAT) with a Master Boot ...
1
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0answers
13 views

Boot Camp says there is a partition when there isnt one

My boot camp is keeping me from using it because it says there is more than one partition (which i may or may not have made in the past). When i go into the disk utility it only shows the internal ...
1
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0answers
20 views

iMac partition grid screwed. Please help?

So yeah i guess i screwed up my iMac 5k retina's (late 2014) partition grid big time and i need your help. It all started yesterday when i tried to format my computer. I'm selling it tomorrow, that's ...
2
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1answer
45 views

About This Mac > Storage shows 10GB Backups, but Time Machine is Disabled

I'm trying to figure out what's going on with my storage. About This Mac > Storage shows that there's ~11GB of Backups. Disk Utility seems to sort the same files as "Other". Googling tells me that ...
0
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0answers
112 views

Missing space in OS X El Capitan after removing a failed Boot Camp partition

I'm trying to help my girlfriend after a failed Boot Camp partition removed approx. 100 GB of visible space from her OS X volume. The main volume is encrypted with FileVault2. Partition table: ...
1
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2answers
73 views

Mount all mountable partitions of a removable disk with diskutil

I have a USB drive containing 2 FAT partitions which are automatically mounted when the drive is plugged in. If I run diskutil unmounDisk <device> and then diskutil mountDisk <device> I'd ...
3
votes
3answers
166 views

Command line equivalent of Disk Utility, which is not diskutil, to obtain UUID

Following on from the answer to Can you make OSX mount just certain partitions when you connect an external HDD?, all of the sites that I have checked (CNET, OSXDaily, Apple Support community threads) ...
1
vote
1answer
83 views

El Capitan Resize VM Partition

So I have this VM in my VMware Fusion, I add 5GB of space to the HDD but then I got this message saying resize the partition: But when I login to my VM and launch Disk Utility, I am not seeing the ...
2
votes
1answer
30 views

Error while unpartitioning hard drive?

I've tried to install Ubuntu (and gave up), but now there's a stuck partition, of 24.22 gigabytes. The pink shows the partition. I want to unpartition it, but when I try to delete it, an error ...
3
votes
1answer
111 views

Cannot reformat external drive with no file system

This whole mess started with trying to encrypt Time Machine backups. I have a 4TB Lacie P9230 external drive which has been working for about a year just fine. The drive has been partitioned into two ...
1
vote
1answer
34 views

Is it possible to get the text log for Disk Utility First Aid check?

Does/can the standard Disk Utility in OS X (El Capitan) log the "First Aid" disk check results in text file? Copy paste does not work on this control and to record the whole log I had to take 22 ...
1
vote
4answers
205 views

El-capitan crashing while booting

Objective: Somehow I want to fix the issue and should be able to login to the El-Capitan without reformating as so many valuable files are there Find what has caused this problem so that I can avoid ...
1
vote
0answers
15 views

Unable to reformat USB drive used for El Captian boot disk

I finally got a USB drive (PNY 128 GB) as an installer for El Capitan using instructions from Frakes' article in MacWorld. The installer seemed to work but I halted the installation process. When I ...
3
votes
1answer
68 views

External hard drive disconnected during reformat: now will not format

Using disk utility, I was erasing and re-formatting to FAT. During that process, the usb cable was removed. Now, the hard drive will not format. When recognizing the hard drive, a window shows up ...
1
vote
1answer
58 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 ...
0
votes
0answers
44 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 ...
1
vote
1answer
163 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 ...
5
votes
2answers
190 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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0answers
36 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 ...
0
votes
1answer
99 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 ...
0
votes
1answer
206 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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0answers
34 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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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
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0answers
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 ...
1
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1answer
103 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
38 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
62 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
52 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
72 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
25 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 ...
0
votes
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 ...
1
vote
1answer
37 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 ...
1
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0answers
336 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
1answer
116 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. ...
0
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0answers
53 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 ...
2
votes
1answer
236 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 ...
0
votes
1answer
55 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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0answers
49 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
23 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
140 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 ...
0
votes
1answer
133 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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0answers
34 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
votes
1answer
154 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
1answer
119 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 ...
0
votes
1answer
788 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: ...