Creating a new disk formatting scheme or altering an existing scheme

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1answer
31 views

My 2011 Macbook Pro won't start - folder with blinking '?'

My Mac will not start up. I went to recovery mode and made a backup of everything on an external drive. Now the Mac only starts up from the external drive. I have OS X 10.10, Yosemite. I tried to ...
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1answer
1k views

How could I install Boot Camp drivers to my Windows partition?

I've finally figured out how to install Windows without any stray network connection errors or invalid .iso file errors, but I've run into a bit of an issue. The Windows partition doesn't have any ...
1
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2answers
238 views

How do I regain unaccessible free space after a failed Boot Camp install on a non-Fusion drive?

Firstly - I know this has been answered, but I am hoping for a more broken down answer, as I am not quite so technically minded, but I can follow instructions! So in summary I have tried to install ...
2
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2answers
7k views

Can't partition startup disk in Mavericks for Boot Camp

I recently upgraded my computer to Mavericks (I believe I have the latest version, 10.9) and I've been trying for 2 days now to install Windows via Boot Camp on my computer, but it always fails at the ...
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2answers
126 views

How do I repartition my Mac to get rid of my dual boot setup?

I setup dual boot on my Mac (with Ubuntu) and want to get rid of it. The Disk Util GUI shows me: However attempting to remove the disk0s4 or disk0s5 partitions results in: Could not unmount ...
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1answer
7k views

How to merge two Mac partitions?

Recently I ran Boot Camp Assistant to install a copy of Windows 7. The "Partitioning Disk" process froze and I force quit it - I know, bad idea - and although I was left with a functioning Mac, I ...
6
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3answers
25k views

how can I delete a partition (coreStorage logical volume?) from the Terminal?

I finally understood why Disk Utility will not change the partitions on my HDD, even though I added the most recent one myself (maybe significant: to test Yosemite DP) with it. Now I see it says it ...
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0answers
20 views

SSD partitioning fails internally, external OK

I bought a Samsung SSD 850 EVO 250GB for my MacBook Pro 13'' Early 2011, but am unable to install OS X to it. (Yosemite 10.10.3) When installing the SSD internally, OS X doesn't find the drive, and ...
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2answers
4k views

Restore Recovery HD partition from Yosemite downgrade

I recently got back to Mavericks from Yosemite, everything went fine. As I normally do, I checked my HDD with the Disk Utility and found some trouble, then I boot on recovery mode to fix my HDD. I ...
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0answers
14 views

Making a Damaged USB Writable for Drive Genius?

Apologies for being (sort of) a repost from Unable to be Repaired & Further Problems but I had some further questions and I was worried they wouldn't be answered. I followed Froggard's advice and ...
2
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2answers
37 views

Split Macintosh HD into 3

At the moment I have 1 250GB partition on my mac (Macintosh HD). What I want to do is split my hard drive into 3 partitions. This is because I want to dual boot with Windows 8.1 and make a reserve ...
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2answers
24 views

Unable to be Repaired & Further Problems

I'll start off with some information about my USB. I use a SeaGate external hard drive USB with 1 TB. About ~250 gb of it is partitioned and formatted to create a Time-Machine compatible partition. ...
2
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1answer
38 views

The full size of the Fusion Drive is not available for repartitioning

Any help would be greatly appreciated, I've found so many similar questions but none that match mine exactly. I created a partion on my 2013 iMac in order to test out the Yosemite upgrade. I decided ...
1
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1answer
32 views

ExFAT partition on External HDD not showing up on Bootcamp Windows 7

So I partitioned one of my external HDD's for my bootcamp windows, just so I could install some Windows files without having to resize my partition by erasing it and reinstalling. Using disk utility ...
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2answers
5k views

Unable to Partition a new Macbook Pro

As a brand new Mac user this might be my naivety or an issue with the OS. I bought a new Macbook Pro today and wish to partition the disk to allow Windows to be installed and Linux too. I was ...
2
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2answers
3k views

Resetting MBR on iMac

I installed Ubuntu on my iMac (partially successfully) I had rEFIT installed but it did not recognize the Ubuntu installation. I removed the partition and rEFIT and now when I attempt to install ...
6
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4answers
23k views

Boot into Mac from Windows after failed Bootcamp

Don't hate on me too much for this one... I put Win8 on my Mac Mini using Bootcamp, and all was well. I switched back and forth a couple times between the two with no problems. The problem started ...
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2answers
4k views

diskutil coreStorage in Lion fails to create a concatenated LVG, error -69886

I would like to create a logical volume group (LVG) with two physical disks. Issue The command: diskutil coreStorage create LVGNAME /dev/disk1 /dev/disk2 returns: Started CoreStorage ...
0
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1answer
22 views

Transfer files between partitions? [duplicate]

After using Boot Camp to install Windows on my Mac, is there any way to transfer files between the two partitions as each is only read only to the other. This is mainly because I have run out of ...
18
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8answers
66k views

Unable to Resize Partitions

I have recently created a partition on my macbook air running OS X 10.9, and this was to run install another OS instance (Yes, OS X 10.10 Yosemite, but that is an aside to the query I have) on it. I ...
1
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1answer
36 views

Can someone explain what 'diskutil cs revert' does?

so I was following some instructions to get my windows bootcamp partition to resize in disk utility, because after upgrading to Yosemite I was unable to resize my partition to give one side more space ...
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2answers
2k views

Merging partitions separated by Bootcamp

In the process of installing windows on my MacBook Pro, I managed to somehow partition the disk this way. Is there any way of merging the UNTITLED 3 segment with the Macintosh HD segment without ...
0
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1answer
20 views

Is it “mandatory” to partition a hard disk for use with Mac OS?

I have bad blocks on the internal Hitachi hard disk in my 2009 era MacBook PRO. I am reformatting the disk with the zero-out option to remap those blocks, but when it comes time to restore the ...
2
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2answers
2k views

How to fix messed-up MacBook disk partition table?

I have broken the disk of my Mac doing partitions with gparted. Now, nothing boots (except pendrives) and the OS X Rescue Disk recognizes the disk as Virtual Whole Disk. Nothing works, repairing or ...
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0answers
6 views

Cannot reclaim partition as free space

I'm trying to reclaim some free space for my main SSD but I'm having problem, the disk utility won't let me expand. Btw I checked for core storage and it said there wasn't any. I can't use ...
2
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1answer
364 views

Configuring SSD over-provisioning on Mac OSX

I'm in early investigation stages of adding a SSD drive to my MacPro. Fragmentation problems can lead to serious performance problems on an SSD. There are a couple answers to this problem: TRIM - ...
0
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1answer
47 views

Can I get bootcamp to use existing free space on physical disk?

When I installed my Macbook Pro, I had a 1Tb drive. When I formatted and partitioned the drive, I assigned 800Gb for OSX and left 200Gb free. I intended the free 200Gb to hold a Windows installation ...
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3answers
71 views

What are all these partitions on my Mac?

I know the purpose of "EFI", "Boot OS X", and "Recovery HD" partitions. But why are there three different "Macintosh HD" partitions? And should there be two EFI partitions? UPDATE Here is what ...
0
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2answers
4k views

Repartition hard drive with bootcamp on it

I currently have this setup on my Mac- OS X Mavericks 10.9.3, Windows (bootcamp) and a Recovery HD. My question is can I repartition my hard drive to have another partition, using disk utility (resize ...
0
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0answers
81 views

Mid 2012 15 inch MacBook Pro Yosemite 10.10.3 Grey Screen Startup Freeze w/ Bootcamp

Recently, I tried to log into a windows partition (created with Bootcamp) that I had not been on in a while. When I selected that partition from the boot options screen, it would freeze on a ...
0
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2answers
93 views

Accidentally used dd on my system drive

As is wanted to write an image to usb stick, I accidentally used my system drive (macintosh hd) as target. Command used: sudo dd if=/dev/zero of=/dev/rdisk1 bs=1024 count=1 Where disk1 was ...
0
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1answer
5k views

Cannot boot into Windows after Yosemite Reinstall

When Yosemite went live to all users, I updated but a week later I wasn't happy with the performance of the mac and certain apps. So I installed the OS from scratch, I made a backup, erased the ...
2
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1answer
84 views

Restoring Fusion Drive after error on partition erase

I think I'm lost and need some help with my Fusion Drive. I have new iMac Retina 5k with 3TB Fusion Drive and preinstalled Yosemite. Things I did so far: I was working on my iMac and had ...
2
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4answers
5k views

Boot Camp Assistant crashes when partitioning drive (exception: EXC_BAD_ACCESS)

I run Mountain Lion, a fresh install, brand new Macbook Pro. HD: Samsung 840 Pro 512 GB SSD. When trying to go through Boot Camp Assistant / Setup it works fine until it wants to repartition my ...
1
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1answer
38 views

Impossible deactivate the disk

Some time ago I split the hard drive (500gb) in two partitions (250 each), now I have first successfully erased one partition but I still have the second one (Mac HD 2, which runs Mavericks) but I can ...
1
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2answers
991 views

can't partition hard drive

I tried to make a partition on my macbook for windows. I was unable to do so, because, apparently, the hard-drive has been damaged. Since I do not have osx installation cd, I tried to recover using 1) ...
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0answers
16 views

Is it possible to boot an installed partition through Virtual Machines?

My native Mac OS partition has Mavericks installed. I created another partition and made a fresh install of Yosemite on it. Is it possible to boot the Yosemite partition in a Virtual Machine or is ...
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0answers
25 views

How to split fusion drive?

I have MacBook Pro late 2012. Instead DVD I made SSD and Fusion Drive by some instructions from web. As you know it's logical drive and looks like one. But now I need second logical partition for ...
0
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1answer
2k views

How to use “diskutil corestorage revert lvuuid” on Yosemite if disk says it is not reversible?

I would like to make a partition for Linux. Here's what diskutil coreStorage list gets me (identifiers omitted): CoreStorage logical volume groups (1 found) | +-- Logical Volume Group ...
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0answers
44 views

Lost 32GB on my Macintosh HD

I created a 32 GB partition on my Mac where I installed Ubuntu, then I've deleted the partition from disk utility having errors, I restarted my mac and now I can't see the 32 GB space anymore. As you ...
0
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0answers
24 views

Partitioning a Hard Drive using “Logical Core Volume Group”

I have a series of scripts I use for repartitioning hard drives before a DeployStudio reimage. They're really simple: #!/bin/sh diskutil partitionDisk /dev/disk0 GPT JHFS+ Mac\ OS\ 10.10 100g JHFS+ ...
0
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1answer
20 views

Unable to change volume size on WD My Passport Wireless

I have been trying to partion my WD My Passport External harddrive that has already got data on it. All of the guides I see on the internet tell you to resize the current volume to do so. I don't have ...
1
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1answer
2k views

No bootable device after failed Windows 7 installation via Bootcamp

While trying to install Windows 7 via Bootcamp on my MBP Retina today I really messed up. After getting into the drive selection in the Windows installation utility I deleted the other partitions (3 ...
0
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3answers
10k views

Why I can not see mac partition under windows installed with bootcamp?

I installed a windows 7 on macbook using bootcamp. Everything looks fine, but one thing. Here is stated that "Apple’s Boot Camp driver package automatically installs an HFS+ driver for Windows, which ...
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votes
1answer
98 views

How to use Boot Camp Assistant to create a dual OS X, Ubuntu system?

I would like to use Boot Camp Assistant to partition my HD, reserving around 30 GB for Ubuntu. I would then have a dual OS X Yosemite and Ubuntu Linux system. This used to be fairly easy. Boot Camp ...
0
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0answers
31 views

Can't resize external hard drive partition

I remember very clearly back when I formatted the drive, that I chose everything that St. Steve prescribed me to, GPT table, HFS+ partitions, even though other platforms can't write to HFS+. Now, ...
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3answers
123 views

Can one create a multi-partition USB Stick with Mavericks, Yosemite, Snow Leopard installers?

Does anyone have any experience creating a multi-partition USB Stick with bootable partitions for installing Mavericks, Yosemite and Snow Leopard? I have a 32Gb stick I'd be perfectly willing to ...
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0answers
15 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 ...
2
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0answers
37 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 ...
0
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0answers
27 views

Installed rEFInd Boot Manager, it seems HD re-ogranized

Before I installed rEFInd, I believe there were three partitions to my Mac, disk0, disk1, disk2. Now, when I run in the Command line diskutil list This is what remains: /dev/disk0 #: ...