Creating a new disk formatting scheme or altering an existing scheme

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22 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 ...
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152 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: [...
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1answer
50 views

Unable to partition internal disk on El Capitan

I'm trying to install Linux on my MacBook Air but seem to have fallen at the first hurdle and am unable to partition my disk. I open Disk Utility, I have ~70GB of free space and when I click ...
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3answers
213 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) ...
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1answer
121 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 ...
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1answer
33 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 ...
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2answers
12 views

How to take backup of a partition from another partition

I have two partition one for Yosemite OS as Macintosh HD and another for El Capitan OS as El Capitan Now El-capitan part is not booting up and I have to take a data backup of El-Capitan from ...
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1answer
85 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 ...
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1answer
131 views

Different partition configuration between gpt and fdisk

After resizing my HFS partition (to solve a case sensitive/insensitive problem) I found out my BOOTCAMP partition was no longer accessible. As I navigate the web, I found out this is a common issue ...
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1answer
38 views

Unable to resize/create partiion using gpt

I have a Mac Server running 10.10. The sole purpose of it at the moment is to take time machine backups from multiple devices. The server itself uses a Thecus NAS AFP share to store the time machine ...
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2answers
85 views

Recovering OS X partition: wrong boundaries calculated, can't mount disk0s2

I followed the strategy of Klanomath (see link) in order to recover my lost OSX (el Capitan) partition (MBR overwritten by bootcamp Windows). In this procedure you have to find the right boundaries of ...
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3answers
152 views

Recover deleted Encrypted OS X Extended volume

I accidentally formatted an external 1TB HD to FAT file system using Disk Utility in Mac OS. The disk used to be HFS+ encrypted. Encryption was done when I created the OS X Extended partition, not ...
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55 views

Can't boot to OSX after resizing the Bootcamp partition

I had set up a Bootcamp partition on my Mac, which I needed to increase in size. Something must have gone during the process because after the successfull installation of Windows I'm no longer able to ...
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1answer
1k views

How do I restore my missing partition and install Windows 7 64-bit?

I previously had a Windows 7 32-bit installed on my Mac using Boot Camp Assistant. I recently upgraded it to Windows 10 (followed Microsoft update message), but later after I saw some drivers are ...
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1answer
254 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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0answers
15 views

Macbook Pro Early 2011 Filesystem Corruption, Weird SATA GPT Boot Issue

For the past couple of days, I'm experiencing filesystem corruption and a really weird switch of my SATA drive numbering on an early 2011 Macbook Pro (8,2). So I've got Linux, Lion, and Bootcamp ...
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2answers
268 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
49 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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3answers
238 views

Missing space on Fusion Drive (partition problem)

I know this or similar problems have been discussed, but (to be honest) I can't see the trees for the wood. I tried to create a partition on my fusion drive (1TB Hd + 240 MB SSD). No partition was ...
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1answer
253 views

How can I change an NTFS Volume UUID?

I just upgraded my Mac to Mac OS X El Capitan and I wanted to update my Windows 7 to Windows 10. But, before that, I need to make a backup of my Windows partition. As I've done it before, I have a ...
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0answers
20 views

Running into bootcamp partitioning issue on MBP Late 2013

I'm trying to use the Boot Camp Assistant to partition ~60GB for a Windows 10 install on my Late 2013 15" Retina Macbook Pro with a 512GB SSD. I'm following all the steps, it takes ~1 hour to create ...
2
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1answer
106 views

How do I remove everything Parallels?

Background: Mac Pro 4.1 circa 2009, specs: OS X El Capitan Version 10.11.3 (just updated last weekend) SN - H09440CK20H 2 - 2.93 GHz Quad-core Intel Xenon processors 32 GB RAM 2 - 1 TB HD 1 - ...
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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 ...
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1answer
163 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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29 views

Recover Boot Camp partition

I have a MacBook Pro 13" 2015, I used this with OS X + Windows 10 on Boot Camp. I prepared all to remove Boot Camp and yesterday finally removed this partition using Disk Utility and Boot Camp ...
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3answers
247 views

2012 MacBook Pro OS X El Capitan wont boot into windows 8.1 after a HD partition change

I had windows 8.1 installed with bootcamp and it was running fine but I ran out of space on the partition I originally created. I had read online that I could free up space from OSX by creating a new ...
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1answer
92 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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1answer
176 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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1answer
693 views

How to create a FAT16 partition on an SD card with OS X El Capitan?

I want to prepare an SD card for use in an old camera using CHDK. The card needs to be FAT16 formatted. This doesn’t work from Terminal anymore, maybe already for years. Disk Utility provides ''FAT'', ...
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0answers
78 views

A new ExFAT partition prevents bootcamp from starting windows

I'm trying to create a shared partition that I can use from both Windows and OS X. I made a new partition, but if I make it FAT or ExFAT Windows does not start. I get Error code: 0xc000000e. I assume ...
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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 ...
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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?
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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 ...
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57 views

Way too many disks in rEFInd?

I'm using rEFInd on my mac that is installed on its own partition. Everything works fine except when I boot into rEFInd (the "EFI Boot" option under the disk selection menu on startup) it shows my OS ...
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1answer
78 views

How to mount ufsd_NTFS partition

I have a USB disk and when I try to mount get the following error mount: /dev/disk3s1: unknown special file or file system. diskutil shows /dev/disk3 (external, physical): #: ...
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1answer
160 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
55 views

How to remove partition on SD card using a Mac?

I got Raspbian on a SD card, and then accidentally wiped it. Now I have 2 visible partition. How do I get rid of the partition on a Mac.
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1answer
190 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
62 views

External drive is damaged and freezes my Mac. Any way to recover?

I'll explain everything in a clearer way. I have a WD My Passport Studio external hd, since a while it's impossible to read it and here's the symptoms: When I mount it and try to open the main ...
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0answers
75 views

Delete bootcamp from my Mac HD

I've been trying to install Windows onto my Mac but it didn't work. It shows me an error after it was installing, I click on formatting the Bootcamp on the drive where they asked me where I wanted my ...
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1answer
182 views

Ghost partition, Windows BSOD

Today I was trying to set up Windows on my MacBook Pro (15", Late 2011) over BootCamp. I used the modified Info.plist-trick to create a bootable Windows 8 USB-drive and create a Bootcamp partition. ...
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2answers
55 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
158 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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106 views

El Capitan issue reclaiming Free Space using Disk Utility

This morning I attempted to remove my BOOTCAMP partition of size 65gb. I believe I was successful in that the BOOTCAMP partition is no longer bootable and the disk space was erased. However, I am ...
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232 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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6 views

Unmount disc (partition) on connection [duplicate]

When I connect my external harddrive, I don't want my "Dual Boot" partition to show up.
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21 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
26 views

MacBook turned off during Time Machine initial back up - What do I do?

My external hard disk was partitioned to 3 partitions and one of which (300 GB) was set up with Time Machine. The initial back up started and was 3 hours through (around 65% of 211 GB complete). I ...
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41 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
71 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 ...