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

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3
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1answer
143 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
127 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
34 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 ...
28
votes
3answers
32k views

How do I get detailed SMART disk information on OS X (Mavericks or later)

I'm trying to get a detailed SMART status report on the drives in my Mac. I'm not talking about "Verified," I'm talking about the detailed report that's about 100 lines long listing all the vital ...
1
vote
1answer
41 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 ...
2
votes
1answer
1k views

Accidently deleted some small sized partitions when installing WIndows(Bootcamp). OSX Partition wont boot

I tried to install Windows 8 into my Mac via Bootcamp. I booted into the Windows 8 Installer and had issues formatting the drive that I partitioned for the OS. Like an idiot, I deleted all of the ...
1
vote
0answers
18 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
90 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 ...
0
votes
0answers
52 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 ...
13
votes
3answers
83k views

Disk Utility won't Unmount HD for formatting

I have two internal drives in my 27" iMac (10.8.5). An SSD system disk and a 1TB SATA drive. The HDD has been acting up recently, very slow performance, bad behavior etc. Tech Tool Pro and Disk ...
1
vote
1answer
279 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
284 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 ...
2
votes
3answers
14k views

Disk Utility vs Carbon Copy Cloner - How to clone your drive with Apple's built-in app

What is the point of using commercial apps like Carbon Copy Cloner when disk utility can also clone your drives? This article here http://www.macworld.com/article/2461362/drive-cloning-utilities-the-...
1
vote
0answers
52 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 ...
1
vote
2answers
1k 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 ...
12
votes
4answers
6k views

How much data has been written to my SSD over its lifetime?

Is there a Terminal command which will show me how many GB has been written to my SSD through the whole lifetime of the disk? I'm asking because I want to find out how many cycles have been done. SSD ...
2
votes
3answers
19k views

Changing a Volume's “Device / Media Name”

I know a Mac volume can be renamed... obviously. But if you look at the output of diskutil you will see that a volume also has a "device name" that corresponds to the name it was given when it was ...
0
votes
1answer
116 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
0answers
22 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 ...
6
votes
6answers
25k views

How to identify and fix files with corrupted / inaccessible disk blocks

I have a late 2011 Macbook Pro, running Mavericks 10.9.2. Its sole HDD is a 750GB drive, formatted with Bootcamp. It's still running reasonably well, but in running a defragment pass on it, I've ...
7
votes
2answers
65k 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
16k 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
13k 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
40 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
34 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
168 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
40 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
126 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
54 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
1k 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: ...
0
votes
1answer
93 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
330 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
88 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
57 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
185 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
16k 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
448 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
2k 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
343 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
164 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 ...
5
votes
5answers
19k 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
54 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
59 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
197 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
54 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
164 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
44 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'...