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

learn more… | top users | synonyms

0
votes
1answer
514 views

Macintosh HD disappeared from finder after “disk damaged and cannot be repaired”

I have a MacPro 13.3 Inch mid2011 with 500GB storage and recently while performing a Mac update, it froze and was still stuck on a grey screen even after multiple restart attempts. I finally tried ...
0
votes
1answer
83 views

Mac Encrypted HDD Please help!

Hi everyone I have encrypted a partition of an external hard drive from the mac desktop. I pressed that key button then pressed memorable and it changed my entire password unknowingly. I need help. ...
1
vote
1answer
2k views

How to add free space to a Logical Volume Group? (Resizing Partitions)

I have two CoreStorage volumes on disk, one is 200GB the other is 50GB. I want to make the 1st 125GB and the second one 125GB. Currently I have been able to use the diskutil cs resizeStack command to ...
1
vote
0answers
3k views

Resizing and moving OSX partitions in Disk Utility

So, I have a Mac Mini with a 160GB drive (it's an old model but it's only for testing). It had 4 versions of OSX on it but one needed more space so I removed the oldest version (Lion) and want to keep ...
0
votes
2answers
135 views

Created a second OS X partition, erased the first, now can't delete old partition

I bought a secondhand macbook pro (early 2011). It was running Yosemite, but I wanted to do a fresh install, as initially I didn't have the password. I created a 2nd partition and installed a clean ...
0
votes
2answers
69 views

Resizing Partitions

I cannot resize the HD of a new Mac Mini. The Mac HD shows 700+ GB on one partition with Yosemite on it and another partition of 200+ GB named "Free Space" and I cannot figure out how it got there. ...
2
votes
2answers
1k views

Orphaned inodes in SSD in MacBook Pro Early 2011

I have a Macbook Pro 15″ Early 2011. Last year I changed the disk to put a new Samsung SSD (Evo). Recently my computer was really slow. I rebooted on the recovery partition, and tested my disk with ...
0
votes
1answer
152 views

I'm not able to re-size a HD Partition to utilize all its free space, how can I fix this?

I've seen a couple of questions on the exchange that are similar to the issues I am having. But I haven't been able to get things to work referencing those issues. I am ultimately looking to install ...
1
vote
1answer
80 views

Free Space Won't Delete [duplicate]

I am running OSX Yosemite. I had free space on my partition, (see picture below) but now it wont delete. I change the format to Mac OS Extended (Journaled), and then when I hit the " + " button it ...
2
votes
1answer
10k views

diskutil shows Macintosh HD is missing (with Recovery HD occupying the entire space)

So yesterday I managed to screw up my iMac 2012 (with Fusion Drive) by installing the Mac OS X 10.10.2 update... The installation stalled and when I tried to restore from an external drive using Time ...
1
vote
3answers
1k views

Clear free space in Disk Utility

So I recently removed Windows 7 from my iMac, but Bootcamp didn't let me do it. I used Disk Utility instead. The old Windows 7 partition now shows up as free space. I want to reinstall Windows 7 again ...
2
votes
2answers
2k views

Flashing folder at start up, all recommended troubleshooting has failed

I really hope someone might be able to help with this cause I am getting frustrated beyond belief. I have a MacBook Pro with Mavericks OS X 10.9. About a week ago it crashed while I was printing, ...
1
vote
1answer
906 views

Not possible to create a sparsebundle image on a SMB mounted Volume

I'm trying to create a sparse bundle image from Disk Utility directly on my NAS (through a mounted smb volume): I then get the following error after a few seconds: Creating a sparseimage the ...
1
vote
0answers
257 views

200GB of lost space! Difference in file size between finder and disk utility

I have installed yosemite and I am trying to have a backup using time machine. Time machine gives an error that the external drive size is not sufficient. And here begins the adventure... I have an ...
6
votes
3answers
34k views

I think I messed up the Fusion Drive on my 1TB iMac (with BootCamp)

this is a somewhat similar post to this one (Can't create partition on free space with Disk Utility) but not quite... It started with me creating a BootCamp partition (around 145 GB) for Windows ...
1
vote
1answer
4k views

What does “EFI system partition couldn't be created” mean?

When trying to click "Repair Disk" on an external hard drive from Disk Utility, I got the following error message: ... Repairing the EFI system partition's file system Updating boot support ...
0
votes
2answers
8k views

Partition issues after deleting Core Storage Logical Volume Group. Everything prompts an unmount error. HELP!

I followed the instructions on this link (last answer) to delete the Core Storage Logical Volume Group via terminal while pressing Cmd+R during startup. These are the functions I used in terminal: ...
4
votes
1answer
10k views

Can't make more than two partitions

I want to multiboot my MacBook Pro, I'm trying to make partitions but in Disk Utility I can't make my partitions, only can divide by 2? Why? It's a normal SSD not a fusion drive (SSD+HD). Now I'm ...
0
votes
1answer
272 views

How do I resize an ex-CoreStorage volume?

I've got a Macbook Pro Retina (with the PCIe drive ‘blade’, instead of a traditional 2.5" laptop drive). I've recently upgraded the internal drive from 500GB to 1TB, and dd'd the old drive over the ...
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 ...
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-...
0
votes
1answer
49 views

disk become empty after delete a large file

I have a 2T mobile disk with the format of NTFS. I store 1T files on it, including a large file with the size of 260G. After I delete the large file, all the file was gone. I remount the disk again ...
1
vote
0answers
393 views

Why does hdiutil fail on symlinks when creaing an image of a Time Machine backup?

I am trying to create a compressed disk image of a Time Machine backup (that is stored on an external HDD) on Yosemite. hdiutil fails on the first symlink it comes across. Before the failure, there ...
2
votes
1answer
3k views

How to create a Mac bootable gparted or Parted Magic thumb drive?

Is it possible to create a Mac-bootable thumb drive containing gparted or Parted Magic without installing a full Linux distribution? I tried several methods like unetbootin (some blogs suggest this ...
0
votes
0answers
785 views

WD My Book Media shows up in diskutil, but doesn't mount or show up in Disk Utility

Initially this drive was connected (via FireWire) to my wife's Mac (still running OS X 10.7), but she it would not mount any more and she asked me to look at it. After reading suggestions on-line, I ...
1
vote
3answers
6k views

how do I “un-partition” my MACINTOSH HD into one big hard drive?

So I was derping around on my computer (it has a 250 gigabyte hard drive) and thought,"hmm I wonder what happens if I partition off 75 gigs of this". believe it or not, it partitioned off 75 gigabytes ...
1
vote
0answers
44 views

Partition failed performing a fresh installation

I'm trying to partition a samsung ssd and want to perform a fresh OS X snow leopard install from dvd. When I try to partition the disk in diskutil I get: Partition failed POSIX reports: The ...
0
votes
3answers
1k views

Unable to shrink a partition in osx 10.10

Hi, I installed windows using bootcamp, but i made the mistake to make the bootcamp only 20gb, so i want to expand it. I found a way to do so, but firstly i need to shrink my other partition - ...
1
vote
1answer
3k views

How Do I Partition A Raid 0 Using Disk Utility?

I have just purchased a WD My Passport Pro. It comes in a striped RAID 0 configuration comprising of two 2TB drives. I want to partition the drive into 3: Photoshop Cache Lightroom Catalogue Video ...
1
vote
1answer
582 views

How to locate “other” files on an Imac [duplicate]

When I look at my available disk space on my imac it says ive used 700 gigs for "other" files. How do i find these files and delete them?
1
vote
2answers
244 views

Why can't I delete the second partition

So I was playing around with Disk Utility today. I created a second partition. Format is Free Space. How do I undo this? As in, I want to have just one primary partition "Macintosh HD" I've tried: ...
1
vote
1answer
214 views

Mounting a RAM disk on startup, but seems to be unmounted automatically

I wrote a simple script that mounts a ram disk: %> cat /System/Library/LaunchDaemons/ramdisk.plist <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//...
0
votes
2answers
538 views

Disk Utility can't repair external hard drive, tried fsck whats the next step?

When I try and repair my external hard drives (I have two corrupt now some how both I think from improperly ejecting from the same machine), I get this message: Disk Utility can’t repair this ...
4
votes
3answers
542 views

How to convert a DVD to ISO?

On Mac OSX 10.9, how do you convert a DVD into an ISO that I can use with players such as VLC. I wish to achieve this without buying a program. Steps I have tried: Downloading Mac app Burn. It ...
1
vote
1answer
1k views

Is Disk Utility's “Repair Disk” a viable TRIM solution for Mac OS X Yosemite?

I'm upgrading a 2010 Macbook with an Intel 730 SSD. Since Trim Enabler is still available but more risk, I'm trying to get by with just Disk Utility. My question was prompted by this hint which ...
0
votes
1answer
128 views

How can I format a USB stick that's falsely marked as read-only?

I was trying to create a bootable disk with Windows on it through bootcamp, but something went wrong during the installation. Now I have a read-only USB stick with corrupt files I'd like to fix. My ...
0
votes
0answers
978 views

Can't add more than 2 partitions

I'm trying to create more than 2 partitions on my mac book pro retina 2014, 256ssd but disk utility only permit me to add one partition. Last login: Tue Dec 30 17:24:32 on console Joses-MacBook-Pro:~ ...
2
votes
2answers
293 views

Why does Finder see volumes which are not under /Volumes?

If I navigate as high as possible in Finder (under 10.10.2, but this did not appear only recently), I see this window, with many volumes which are long unmounted, ejected and erased. But if I tried ...
1
vote
2answers
331 views

After erasing 200 GB I need to repair it using the Recovery HD

I was cleaning my MacBook Pro, erasing all unused files I had on it. After that I decided to erase the free space, so I will have all my files organized and cleaned the "used space". After that I ...
1
vote
0answers
77 views

WD Drive Cannot be Repaired but program still running

I have an external hard drive that I use to run my iTunes, iPhoto library and store various other documents. Recently, it stopped connecting to my MacBook Pro. I can only see my WD Ultra external ...
1
vote
1answer
87 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?
2
votes
1answer
1k views

Problem after erasing the HD of a brand new Mac (OS X Yosemite) with Disk Utility

I cannot reinstall OS X Yosemite now, as there's no hard drive I could see. I had erased the HD with the idea that it will create a new partition but it didn't, so now I can't see a hard disk on ...
0
votes
0answers
1k views

Drive name red in Disk Utility: Core Storage Drive offline. How to bring back?

Yesterday, my mac wouldn't boot up. When I restarted, I could get the whole way to the User login screen. No matter what user I chose, the boot bar would get about 1/3 way finished and I would get ...
3
votes
2answers
2k views

Format External Disk in FAT, NOT FAT32

I have an external device which mounts as an external drive and which I must format in FAT, not FAT32, for use elsewhere. Is there a way to do that from Snow Leopard?
2
votes
0answers
3k views

Disk Utility: Invalid Disk Label @ cksum mismatch

I have a WD external hard drive. I've been running the routine tests to make sure all my stuff is safe lately. In Disk Utility, I did Verify Disk on both the disk itself as well as the main partition, ...
3
votes
1answer
198 views

Interesting partition Map with missing HD space

I have the latest generation Macbook Pro running Yosemite, I bought this computer used I don't know if the last person attempted to install linux or what the story is but I believe my partition map is ...
0
votes
1answer
603 views

Can not reinstall Windows7 (using Boot camp) after i've removed Bootcamp partition via Disk Utility

I've removed Windows partition (might be label as Bootcamp) using Disk Utility. and after that i found that i made some mistake because in actually i should remove it via Bootcamp Assistant. What's ...
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 ...
0
votes
1answer
847 views

OSX Yosemite can't resize partitions?

A few weeks ago I installed OS X yosemite.I did it on the standard partition, but I had a dual-boot with ubuntu. I realised that the ubuntu boot was gone so I tried to redo it. But in disk utility, ...
0
votes
1answer
3k views

Macbook Lion Recovery Disk Utilities cannot detect newly installed SSD

I just installed the SSD and I cannot detect the SSD in Disk Utilities of the recovery disk. Even trying to restore from time machine backup it cannot find any disk it can restore to. I am restoring ...