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

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2answers
20 views

Change drive “block size” to 4096

I just bought a 4tb hard drive and enclosure and attempted to encrypt it with truecrypt. I errored with a message saying the block size must be 4096 bytes for >2TB drive. How do i alter the drive to ...
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0answers
13 views

Impossible to join free space on main Machintosh HD [duplicate]

I've removed Windows deleting the partition because from BootCamp Assistant it gave me error that couldn't partition the disk. The problem is that now I have 100 GB of free space (which are from the ...
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1answer
44 views

Apple Hardware Disk Utility Unallocated Space on my Hard Drive

While trying to get bootcamp set up on my macbook pro 15 inch retina 2015 it asked me to partition my mac hard drive. Doing so I partitioned my 1 TB hard drive so that it dedicated 750 gb to mac and ...
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1answer
19 views

Expanding Flash Storage with SDXC

I see on a Macbook Pro, you can expand your current storage space with SDHC or SDXC. Being a Linux user I know you can use RAID to expand storage with 2 disk, so storage looks like 1 HD. However, most ...
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2answers
52 views

Can I build a VM and use the image on a MacBook?

We are going to have over a hundred MacBooks in our school. We would like to create a master image with all our base settings and applications so that it can be installed on every new MacBook that ...
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0answers
24 views

Lost partition on WD 1.5 TB external drive

My 1.5 TB WD drive failed out of nowhere and now it shows up saying "The disk you inserted was not readable by this computer" This is how it shows up on Disk Utility This is what sudo gpt show ...
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0answers
35 views

Unknown disk found using diskutil, cannot delete

Using the command line, I wanted to see all available drives on my machine. So, I type diskutil list and besides Recovery HD and Macintosh HD, I notice this: /dev/disk3 #: ...
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2answers
66 views

Partition my HD with Disk Utility, cannot resize the partition WITHOUT installing Windows. WTF?

I am installing Ubuntu on my Mac to exist as in parallel with OS X Yosemite, version 1010.3. The screenshot looks similar to previous questions, e.g. How can I resize a partition with Disk Utility? ...
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0answers
29 views

Disk Utility won't let me create new partitions?

I had a 500gb HDD installed in my Mac running OS X 10.9.5 Mavericks. Being an older drive it started to have some issues, so yesterday I went out and purchased a new 1TB hard drive to replace the ...
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1answer
30 views

Fixing a broken hard drive's partition map

I have a drive that is corrupted. Disk utility could not repair the disk, so I attempted to follow some tutorials and repair the partitions using pdisk and testdisk, but things have gone south. Now ...
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0answers
22 views

How can i delete a partition in Terminal when I can't simply combine because 'The given partitions are not on the same whole disk'?

Before I partitioned my HD, the only one I had was "Macintosh HD". The partition created one called "Macintosh HD2" I used terminal to erase "Macintosh HD2" somehow, but it returned as "Untitled." ...
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1answer
29 views

Questions regarding disk format

I'm doing a fresh install of Yosemite on my mac, but stopped at format step: I noticed various options: plain format encrypted case sensitive So, I'd like to know: Is it possible to install ...
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1answer
37 views

Error with Android usb. Working Macintosh HD not repairable. Alternatives to backup?

I have to say first, I have almost zero experience is the use of Terminal, an usually I'm very careful with what command I use. I have tryed to create a bootable Android x86 usb and it was a success, ...
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1answer
48 views

Erase partition without recreating one?

I've got an external USB hdd that I wish to use entirely as a TrueCrypt volume. There was one pre-formatted partition, so I'm trying to erase that with Disk Utility. But no matter what I do or try, ...
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0answers
23 views

Volume encryption takes *hours*, is it possible to fix it?

I'm encrypting an empty volume. Internet articles say that is must be almost instant — but it's not the case. It's probably doing a kind of wipe (securely erasing free space), but if I really don't ...
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0answers
67 views

Cannot resize Macintosh HD

I currently have elementary OS installed alongside Yosemite. When I try to resize Macintosh HD to give space for a Windows installation, I get the "filesystem support for resizing required" error even ...
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0answers
146 views

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

When I tried to erase space on Disk Utility, it couldn't create a second temporary file for my startup disk.
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1answer
57 views

Where is my disk space going?

My available disk space seems to «vanish» magically. OmniDiskSweeper tells me that 69.5 GB data is on my hard drive, but how come Finder and Terminal (and OmniDiskSweeper's drive list itself) tell me ...
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1answer
38 views

Can't format o repartition any USB or Flash Drive

I am trying to format an SD card and an USB flash drive. When I use the Disk Utility application I receive the following message: "Couldn't open device" I also tried via terminal and the message I get ...
0
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1answer
48 views

Reformat a Partitioned Mac OS Extended External Disk?

One of my backup disks is full. How can I Erase & Reformat the drive? I use Yosemite OS. The External Hard Drive was formatted as Partitioned Mac OS Extended (case sensitive, Journaled, Encrypted ...
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0answers
20 views

Extracting files off sparsebundle with read errors

I have a large sparsbundle disk image on a drive that is reporting read errors. I am able to mount the image although it can sometimes take several minutes. I would like to copy any readable files ...
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2answers
32 views

how do i remove Ubuntu from my macbook? [closed]

i just bought a Macbook from someone off of Craigslist but it has Ubuntu software on it, but I want the regular Apple OS. how do I remove Ubuntu without damaging the computer and its files?
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1answer
52 views

Mac Mini can't unmount disk in Recovery Mode

I need to wipe my Mac Mini and reinstall OS X. Booting into recovery mode (holding command+option+R), I try to erase the disk in Disk Utility but it says it cannot unmount the disk or gets stuck on ...
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0answers
67 views

Is it safe to convert Core Storage partition to HFS+?

I just got my new Macbook Pro, I tried to make two new partitions using Disk Utility but I could only create one. After googling I found out that I can't create more than one additional partition in ...
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0answers
7 views

Why does disk utility want to erase my RAID 1 set?

I have 2 disks, the first a 2 TB and the second a 5 TB the 2 TB is split into 2 partitions and the 5 TB into 3 partitions with one 2TB RAID0 set, one 1TB RAID1 set and one single 3TB partition. I now ...
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1answer
53 views

Backup Disk 'doesn’t contain an EFI system partition'

I have a 750GB Western Digital external HDD which I use for Time Machine backups (MBP, OS 10.10.3). Today I had the need to boot to recovery, which I did from said backup. But I was unsuccessful in ...
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2answers
155 views

Hard Drive Issues with MacBook Pro 13-inch mid-2012

I'm trapped in a HDD nightmare with my MacBook Pro mid-2012. I updated to Yosemite 10.10.3. A couple of days after the update, I was watching a movie on my TV screen via HDMI. In the middle of the ...
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2answers
22 views

Recovery HD left in the middle

I did some partitioning to install Linux. Then I decided to erase that partition altogether. Now I am left with a configuration like this: How can I add the free space to main partition?
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1answer
48 views

Flashing question mark when I start my Mac

https://support.apple.com/en-us/HT204323 I tried everything in here didn't work. I am using a 13" macbookpro retina, latest OS. Stuff I did that might have cause this: I updated 3 apps 1 of them ...
0
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1answer
84 views

USB Drive Will Not Mount, Not Listed in Disk Utilities, but Found In System Profiler

I have a Seagate FreeAgent Go drive with the optional docking station. I use it to keep files that I don't access on a regular basis and as a place to do "quick backups" of things like my Paperless ...
0
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1answer
29 views

Apple MacBook Air mid-2012

A few days ago, I got my Macbook Air battery changed at an Apple store. Since then, about once a day, I've had a "kernel panic" crash, which seems to happen randomly while I'm working. (I've never ...
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0answers
33 views

New Pro can not create netboot set in deploystudio

I tried creating new DeployStudio NetBoot Set. For some reason after it starts creating it, I get the error "DeployStudio NetBoot set Creation Failed! An error occurred while trying to create the ...
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1answer
20 views

OSX partition failed

I stumbled upon errors when I tried to partition my HD for an ubuntu partition. First it kept saying Partition Failed: Filesystem Verification failed That problem did disappear after a while. Probably ...
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4answers
118 views

I can't shrink my OS X Yosemite partition [duplicate]

I recently reformatted my machine and am trying to shrink my OS X partiton to make room for a linux partition, following instructions at http://www.makeuseof.com/tag/install-linux-macbook-pro/ . I am ...
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0answers
35 views

Formatting & partition problem

Today I ran into a big problem: I was trying to make a bootable OS X thumb drive with Unibeast but haven't been able to format or partition it. The error shown when i try to format or partition in ...
0
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1answer
49 views

How do I repair a hard drive that was being written to while my MacBook Air crashed? (Drive will not mount)

My external backup drive will not mount. I have tried to mount it in Disk Utility via the app and the command prompt but the attempt times out. Any suggestions? I backed up my HD the day before ...
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0answers
19 views

How do I transfer unallocated space from volume A to volume B?

Let me just clarify it with the picture below. As you can see, there is much free space on the 'SSDaeffer (1)' partition, but as this was my OS X Beta partition, I want to transfer that free space ...
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0answers
37 views

how to mount internal hd after booting with external drive?

I am running macosx 10.6.3 and trying to mount/access the internal hd through diskutility: it does not show up here. I tried this: ...
2
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2answers
82 views

Resize FusionDrive to fill empty space?

Context: I wanted to install Windows 8 onto my Mac by repartitioning my FusionDrive. Using the partition BootCamp provided didn't work, so I found a "solution" on Apple forums to create empty space ...
0
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1answer
55 views

Disk space lost after quitting disk partition

My MacBook Pro came with a 500 GB hard disk, and I used about 250 GB. I was trying to get a new logic partition using the OSX disk utility, and then my Mac Book Pro froze and I had to quit the Disk ...
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0answers
15 views

Rename the Disk, not the partition [duplicate]

I recently bought a MacBook Pro 15" of mid 2015. It has a SSD named 'This mac' but I want to rename it. I have two partitions, one called 'Macintosh HD' and one called 'Windows HD' since I have a ...
0
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2answers
84 views

Move Bootcamp to external drive - restored, fdisk - still not recognized as bootable!

I want to copy my W7 Bootcamp partition to an external HDD, and be bootable of course. It is currently functioning fine alongside Yosemite on a different HDD. DiskUtility Restore works... I marked ...
1
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1answer
15 views

Can a disk's catalog directory be recovered after a Quick Erase?

A disk's data directory seems to me to be the most vulnerable Achilles's Heel to protecting data. With the 2 clicks of an accidental quick erase and format via Disk Utility, the roadmap to ...
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0answers
67 views

Create Iso from directory

I'm trying to create an iso from a directory on my computer. I've tried using both the Disk Utility method and just Terminal but I keep getting Operation not permitted errors regardless of my method. ...
0
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1answer
93 views

Recovery HD Is not showing up. Is it because of FileVault?

I have a problem. On my mac, when i start and hold the ALT key, or the Command-R Key, then it doesn't boot into Recovery HD or even show it. I need it to repair, mount etc. my disk. I tried disk ...
0
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1answer
21 views

Continuous volume shows too much available space

I have a continuous volume of two identical SSD drives. 2 terabytes, 1.92 terabytes in practice. I plugged it in via USB today and finder and disk utility show that all the space is available. ...
0
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1answer
58 views

repair disk - unmounted encrypted disk partition

In Yosemite 10.10.2 after verifying my startup disk in disk utility I got this message... "This disk needs to be repaired using the Recovery HD. Restart your computer, holding down the Command key ...
0
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1answer
59 views

Seagate Slim 2TB Not Recognized

I recently purchased a Seagate Slim 2TB external HD. I connected it to my 2010 iMac, formatted it as exFAT, and moved a bunch of files. I don't remember exactly what process I went through with ...
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0answers
38 views

Mac OS X Mavericks starts with question mark

Yesterday, I was using my Mac OSX and some applications were using a lot of memory. It wasn't possible for me to finish my Mac correctly and I decided to turn off the computer with the On/Off button. ...
0
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1answer
93 views

macintosh HD missing from Disk utility

I've purchased macbook pro 13 retina, wanted to migrate data from my mba. So I formated drive, installed spanking brand new osx from recovery disk. And launched migration assistant. Migration ...