Creating a new disk formatting scheme or altering an existing scheme

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24 views

Bootcamp [in another partition] running as Virtual Machine on Mac

I have OS X in partition disk1s2 and Windows/Bootcamp in disk1s3. Is there a way of running this Windows (disk1s3) as virtual machine while I am on OS X? I read something like that for Linux + ...
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1answer
45 views

Boot Camp won't work: why don't I have disk0s0 or disk0s1 partitions?

I'm trying to use Boot Camp after resolving a partition mess. I've gotten back to a single partition after receiving the The startup disk cannot be partitioned or restored to a single partition. ...
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36 views

Accidentally Deleted BootCamp Partition. How to recover files and merge partition?

I accidentally deleted the BootCamp partition through Disk Utility on MBP 2012 Yosemite 10.10.5. I had some important files on the BootCamp partition. Unfortunately, I have no backup of the Windows OS....
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1answer
89 views

OS volume shows as type 'FFFFFFFF-FFFF-FFFF-FFFFFFFF' after attempting to delete some Linux partitions—cannot log in

I was unable to just delete the partitions left by an old Linux Mint installation by pressing the '-' button in disk utility. I looked online and read that I could reformat them to a journaled format ...
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1answer
61 views

Upgrading one partition to El Capitan while leaving the other on Mountain Lion

We have an iMac that is barely still compatible with El Capitan. Right now it runs Mountain Lion okay, and actually it has a smaller partition on the hard drive for another clean installation of ...
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127 views

After stuck “Partitioning disk” by Boot Camp

I use a MacBook Pro Late 2011 with OS X El Capitan (10.11.4). I wanted to install Windows using Boot Camp Assistant. However, I got stuck at Partitioning disk.... It seems that it is a very common ...
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305 views

'the 'grub-efi-amd64-signed' package failed to install into /target/' during Linux Mint installation on an iMac

I have a Mid 2007 iMac, I've installed rEfind on the mac and the Linux Mint (Cinnamon 17.3) installer on an USB thumb drive . rEfind sees the USB thumb drive, sees grub installed on the key, I boot ...
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20 views

Lost disk space after partitioning w/ disk utility crashed

I made the mistake of deleting a bootcamp partition thru disk utility in hopes of making a larger partition with a fresh windows install. As I tried making a new FAT partition in disk utility I ended ...
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75 views

Problems Making a USB Windows Boot Drive - Then Booting my Mac from it

I've seen tutorials on how to make a windows usb/flash boot drive on a mac using a windows iso & bootcamp. I've also seen tutorials on how to boot a mac from a usb drive (hold down alt when ...
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2answers
86 views

How to read GPT drive in Mac?

I've a 500GB external drive. First partition is 199.58GB (blue) and the second partition is 277.4GB (pink). I use this drive in my Windows 10 laptop before this and both partition are GPT type. I ...
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1answer
39 views

How to reformat Macbook Pro SSD to regain “Free Space”

I just tried installing Windows 10 through Boot Camp. Before it actually started installing (but after I had partitioned my disk), I realized I had not plugged in a USB (which apparently you are ...
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28 views

El Captan disk utility did not see erased partition after fail bootcamp install

I try to get my full drive after fail a bootcamp install of Win. Now I have removed extra partition from my fusion drive, but can’t see empty space using the el captan disk utility. Using shell, ...
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1answer
70 views

How to install a bootable ISO onto a single partition of a usb stick?

Previous questions/answers dealt with the simple case of a single partition on the USB disk that was just overwritten with dd. Also it looks like the disk utility gui doesn't allow creation of ...
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17 views

macbook ssd hard partition unmount

Yesterday my fiend used my macbook to set his flash memory bootable but he made mistake and select my mac disk volume instead of his flash! Now when I restart macbook it shows a slasher question ...
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1answer
81 views

HFS+ Partition of Mac OSX is not recognized in Windows 10 Bootcamp

I installed triple systems (Mac, Windows, Linux) on my Macbook Pro retina mid 2014 with rEFInd boot loader. Hfs+ partition used to be visible in Windows 8.1 Bootcamp. But after updating to Windows 10,...
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1answer
95 views

Messed up my 1TB Fusion drive on my iMac with Disk Utility

Soooo something bad happened recently with my 1 TB Fusion drive on my 5K late 2015 iMac. I was creating a new 100 GB partition on my disk. So while the disk utility was busy scanning etc (doing its ...
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1answer
24 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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37 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 on ...
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32 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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48 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 drive,...
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2answers
71 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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16 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
61 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
90 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
135 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
63 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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65 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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17 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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36 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
51 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 ...
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1answer
83 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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653 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
156 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
106 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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18 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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38 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 ...
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1answer
27 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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79 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
356 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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14 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 ...
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1answer
48 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? Note:...
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24 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
93 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
28 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 ...
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3answers
86 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 ...
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1answer
39 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 them....
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1answer
67 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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2k 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
96 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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111 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 ...