Creating a new disk formatting scheme or altering an existing scheme

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1answer
10 views

Recovering a confused partition table?

So I've got a MacBook Pro which I use for work (and thus every file is precious information) and my BootCamp partition was getting a bit small, so I resized it with GParted, but not before resizing ...
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0answers
21 views

My partition is using negative space. Should I worry?

As you can see, according to Disk Utility, I'm using negative space in /dev/disk0s7. This is obviously incorrect, however, I am slightly worried as to what this may mean for the partition's effects ...
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0answers
18 views

Mac OSX 10.6.8 Failed Boot Camp Partition Cleanup

I'm working with a late 2007 Macbook (A1181) running OSX 10.6.8. I do not currently have a working OSX disk I could recover off of This afternoon I was using Boot Camp to create a large windows ...
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0answers
14 views

Boot Camp - frozen during hard drive partitioning - iMac 27” w/ 3TB Fusion Drive

(iMac 27” late 2012, 3.4GHz, 3TB Fusion Drive, running El Capitan 10.11.4.) I've gone through the Boot Camp Assistant steps with all of the recommended options (created a bootable Windows flash ...
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2answers
29 views

Create hybrid MBR/GPT just like Bootcamp Assistant does

Currently I have two partitions with data on them I would like to keep (marked with a *): /dev/disk0 (internal, physical): #: TYPE NAME SIZE ...
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0answers
13 views

Isolate Partitions

I'm trying to partition my HD into a 'anything is ok' development/beta type drive and a no bs allowed drive. Not a fan of these drives having access to each others applications and file systems. ...
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1answer
23 views

Deleted Bootcamp partition and it just disappeared. Nothing to merge with OSX partition

I had Windows 10 Bootcamp on my MacBook Pro 15" 2015. I just tried to remove the Bootcamp with Bootcamp assistant by clicking "restore" and it gave me an error saying "The disk cannot be partitioned ...
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1answer
68 views

Create El Capitan install partition

I went through a lot of articles on how to create bootable os x install partition but eventually I ended up with a need of making resize of my system partition - unfortunately DiskUtility shows this ...
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1answer
66 views

Partition sharing - messed up with GPT/MBR

First of all, sorry for any English mistakes or print screen in French... I'm Belgian. I've had a lot of problems with an iMac 2009 27", mostly with Mac OS. Strangely, Windows (10) works with little ...
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2answers
29 views

Merge partitions with Macintosh HD

This is my diskutil list. I wish to merge Misc (disk0s4) with Macintosh HD (disk0s2) leaving only Macintosh HD (disk0s2). Normally I would use this command to merge the two disks: diskutil ...
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0answers
24 views

Format usb drive into ext4 and swap partitions

I have been trying to create a model of a passive WiFi tracker by following the steps given in the following link: http://edwardkeeble.com/2014/02/passive-wifi-tracking/ One of the steps requires me ...
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0answers
11 views

OS X stopped recognizing my HFS+ Time Machine partition on my USB GPT disk

I have a 2 TB USB drive that's using GPT, but OSX (10.11.4) on my macbook pro (early 2015) stopped recognizing my HFS+ partition after I inserted a partition before it ("TESTPART"), effectively making ...
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0answers
21 views

Partition map check failed because no slices were found for SD Card

When I connected my sd card to macbook, I got the error "The disk you inserted was not readable by this computer". I ran following commands ~ diskutil list /dev/disk2 (internal, physical): #: ...
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1answer
35 views

How to restore OS X drive to factory defaults?

I turned off the Core Storage volume manager on my OS X partition (i.e. diskutil cs revert). Now my Recovery HD displays in Disk Utility and in Startup Manager. I don't like this and would like to ...
3
votes
1answer
57 views

Reformatting disk with no partition map

I have a 250GB hard drive that I tried to "burn" an ISO to (to make it bootable). Something went terribly wrong.This is what the disk looks like in Disk Utility (unmounted). When I mount it, this ...
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1answer
70 views

Cannot delete or merge old boot camp partition in El Capitan

So i've battled with this for quite some time, look up various topics with various solutions, however i have yet to succeed with merging my partitions into one. I had previously installed windows 10 ...
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1answer
41 views

How to fix bootcamp boot after removing hybrid MBR

I've updated bootcamp to Windows 10 which should support GPT with protective MBR without any hybrid tricks. I have 6 partitions on disk0 so hybrid MBR is also inconsistent with GPT and it's somewhat ...
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1answer
27 views

corestorage failure: missing disk, how to recover data?

This morning, my iMac show me the prohibit sign. After hours of struggling, I'm facing this: the Mac does not want to boot up. I have a lot of recent files to recover, but have this issue: root# ...
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0answers
15 views

How to run multiple versions of Mac OSX on my MacBook

I recently bought a Macbook 4,1 from early 2008. (as it says in system information) I need to run multiple versions of osx, like on two partitions. I currently have installed os x 10.7 and need to ...
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0answers
34 views

OS X El Capitan renames Windows volume on every boot by appending increasing numbers to the volume name

I have installed Windows on a separate hard drive on my MacBook Pro running OS X El Capitan. OS X is running on an SSD and Windows is on another physical hard drive. I named the other hard drive ...
0
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1answer
25 views

File types in EFI partition

In El Capitan, I mounted the EFI partition using sudo diskutil mount /dev/disk0s1 and instead of finding apps that I can run, I found .scap, .smc, .epm, and .efi files. What are these? The reason I ...
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0answers
42 views

Increasing size of boot camp partition without reinstalling windows (free)

I have installed windows 10 on mac book pro (256 gb) size of boot camp partition according to default, now is 32 gb. I would like to increase size of that until 100 gb. I found some different solution ...
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2answers
98 views

Failed bootcamp partition, now can't remove it

Tried to set up Windows 10 on my Macbook Pro 15" (Mid 2014). Running El Capitan 10.11.3. Windows refused to install (GPT partition only problem?). I followed steps elsewhere to remove and reformat the ...
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0answers
13 views

main partition 'not mounted' problem

After crashing, main partition is greyed out and 'not mounted'. Here's the detailed info on this disk: I wanted to install Ubuntu on my Macbook Pro Retina (early 2013), so I could run some specific ...
0
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1answer
40 views

Boot Camp problem on MacBook Pro (2015)

I installed Windows 10 with Boot Camp Assistant, but when I press the option key on boot, it shows only the Macintosh HD partition. Why is that happening? Is the BOOTCAMP partition not bootable? ...
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0answers
20 views

Index partition on Time Capsule and open on Startup

I recently reinstalled the OS on my MacBook Pro. All of my files are backed up on my Time Capsule. However, as my Mac is now running a zillion times faster without all the files on it, I decided not ...
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1answer
68 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) ...
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1answer
24 views

How to automat the selection of usb disk based on size

I am trying to automate a process where teachers delete content on memory sticks with different name then put the right content back (same each time) and rename the memory stick to UDISK. I want to ...
0
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3answers
50 views

New SSD can't be initialized

I have an old Macbook Pro for which I bought a new SSD and replaced the HDD with the SSD. Can't go further, see below. I really don't know what to do. I could return the SSD which, finally, might ...
0
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1answer
28 views

How to remove a partition that fails to remove. [closed]

I failed installing Ubuntu, the remaining partitions are un-removeable, when ever I try and remove them I get operation failed. How can I resolve this issue? I need to either remove them or erase ...
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1answer
56 views

Can I use the free space on an NTFS Hard Drive to make a “Mac OS Journaled” partition to use as a backup space?

I have a 1 TB NTFS HDD which has 350GB free space, how would I format that 350GB to use it as a backup space for my MacBook? diskutil list output: /dev/disk1 (external, physical): #: ...
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1answer
125 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 ...
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2answers
56 views

Seagate is not allowing me to make partition on MS-DOS (FAT) Or ExFAT!

I just bought an external hard drive (Seagate Backup Plus Slim 2 TB) for my Mac (Yosemite installed) for professional photography. I wanted to make partitions for both Mac and Windows, but it only ...
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0answers
65 views

Revert Apple CoreStorage volume back to Apple HFS

I have a computer that is encrypted with Symantec PGPWDE. A scripting error occurred when trying to decrypt the system and remove PGP and convert the disk to CoreStorage to prepare for using file ...
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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 ...
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0answers
17 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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0answers
96 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
35 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
133 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
54 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
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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 ...
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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 ...
3
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1answer
47 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
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1answer
92 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 ...
0
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1answer
33 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
74 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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2answers
98 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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0answers
41 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 ...
3
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1answer
507 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 ...
1
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1answer
87 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 ...