Creating a new disk formatting scheme or altering an existing scheme

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Macbook not able to boot using OS X (Yosemite) after partitioning the Macintosh HD(hdd) while installing kali linux

I tried to partition the HDD using GParted but it didn't work out. Maybe because I messed up. So after cancelling the whole process, I rebooted my laptop. When I tried booting through OS X, it did not ...
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3answers
31 views

How to re-download Yosemite for creating second partition?

I have a paid Apple Developer account, and want to create a Beta-Partition with Yosemite. I thought the way is pretty straight forward: Downloading Yosemite Install it Choose second partition ...
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1answer
18 views

Is there a way to limit OS X when searching for apps?

My issue is that OS X is finding multiple versions of applications. When opening a file with the "Open with ..." option, I see multiple versions of an app. This is being caused by having multiple OS ...
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1answer
8 views

Late 2011 MacBook Pro Cannot format HDD

I have a Late 2011 MacBook Pro with 750GB HDD. I was running Yosemite 10.10.2. I had about 250GB of partitioned HDD that i wanted to add to my main partition 'Macintosh HD'. It let me remove the ...
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1answer
29 views

How to recover the name of a non-system volume containing all user folders in Mac OS X Lion?

I have done something stupid and need help: I have 3 external drives attached to my Mac and in an attempt to make the partition names more meaningful, I renamed them using finder/get info. My user ...
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1answer
59 views

Disk Utility message “Updating boot support partitions for the volume as required”

Finder crashed on a external drive which caused an abrupt eject. I rand Disk Utility over the drive and the operation finished with the message: Updating boot support partitions for the volume as ...
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1answer
68 views

Hard drive no longer accessible

This is a 4 TB hard drive formatted in Mac's Disk Utility as a single non bootable Exfat partition with the drive letter G. It worked fine before I decided to make a clone drive of my C bootable ...
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22 views

How do I create a bootable USB drive that will reinstall OSX Yosemite from a Windows 8 Computer

I deleted a system file on my Mac that made it stop working. When I restart, it just crashes midway and restarts again. If I hold shift to do a safe reboot, it freezes halfway through. When I reboot ...
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1answer
28 views

Force stuborn drive to unmount

I have a single partition disk whose filesystem will not mount properly. I don't care about the data and I would like to try reformatting the disk but I keep getting errors related to a failure ...
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21 views

MacBook Air boots into wrong partition

I have two partitions created, one called "Yosemite" and the other is my default 10.6.8 partition "Macintosh HD". I successfully installed Yosemite onto the "Yosemite" partition, but when I try and ...
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1answer
25 views

Does a bootable OS X drive need more free space than the installer?

I made an 8GB partition on my HD to serve as a bootable OS X Yosemite drive, but it seems to still have 2.63GB free after the bootable drive-making procedure. Does the bootable drive need that space ...
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1answer
39 views

Partition on External Hard Drive not showing in Finder

My external hard drive is partitioned into three parts - but somehow I made one of the parts go away/stop showing up in the Finder. I ran a set of recommended commands in terminal, and this is what I ...
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17 views

Brand new 15in retina

I bought the mac then hooked up Time Machine and started restore to Mac HD. All was fine until the end when the backup from on 6 minutes to go for a couple of hours. No progress at all. So after ...
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1answer
25 views

Resizing Macintosh HD partition to use free space

I recently deleted a partition and have 60GB of free space. I would like for my main partition to use that, but whenever I go to resize it, I get the error "You can’t perform this resize unless it has ...
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1answer
58 views

HFS+ invalid number of allocation blocks

Okay so a few days ago I wanted to install Ubuntu GNOME over regular Ubuntu and it gave me the option to automatically overwrite my Ubuntu installation (that I had on a separate partition from my OS X ...
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1answer
121 views

How to fix the error: “This disk doesn’t contain an EFI system partition”?

I get the following error and cannot start Bootcamp after accidentally deleting the EFI-partition of my main drive. This disk doesn’t contain an EFI system partition. If you want to start up ...
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1answer
42 views

Failed to mount partition of Mac OS Extended (HFS+)

As a matter of fact, my 1 TB External hard disk has three partition: "MAC OS", "NTFS" and "FAT32". All of the partitions worked very well in the past. However, I just discovered that my Mac OS ...
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1answer
34 views

Why don't Windows 7 bootable sticks start on MacBook?

On Macbook air ~2014 when I created the bootcamp partition and the Windows bootable stick, it made a stick that can start an install just fine on Windows computers. Why doesn't that bootable stick ...
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52 views

Mac OS X dosen't recognize hard disk

I have replaced my CD drive with a Western Digital 750GB hard drive using the iFixit guide. My Mac for some reason throws error on any interaction with the hard drive, for example on disk utility ...
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25 views

Partitions shows it is 2GB when it is actually 120GB

After messing with the partitions to install Ubuntu, the hfs+ partition which I use for my user data went from 130GB to 2GB (OSX is on a separate partition). Disk Utility shows this partition as ...
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1answer
31 views

Partition of harddisk lost/unusable

I'm using OS X Yosemite - version 10.10.2. I have 1.12 TB fusion drive on my system. Recently I wanted to make a partition on my system, while making the partition on the system using disk utility ...
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2answers
116 views

How to setup two OS X boot partitions plus Bootcamp and Data?

Is it possible to set up he following combination of partitions; how? two OS X partitions, each bootable (one for the main system, another for testing new OS X releases) a Bootcamp bootable ...
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1answer
47 views

Is undoing Yosemite's CoreStorage conversion dangerous?

I tried to make an 8 GB partition on my hard drive so I could make it into a bootable drive, like Recovery HD but without the need to redownload the OS, but for some reason Disk Utility wouldn't let ...
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1answer
33 views

Remove partition and restore the space without erasing

Time ago I split the hard drive (500gb) in two partitions (250 each), now I don't need them anymore, so I have first erased successfully one partition and now I have still the second one (Mac HD 2) ...
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2answers
39 views

How does disk utility work while the system is live? (e.g. partitioning/resizing the OSes partition)

How is it that Disk Utility allows you to resize the partition that OS X is botted from live, while the OS is running? Can there be problems doing this? I would have thought that booting into recovery ...
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1answer
86 views

Partition SSD in Yosemite for Dual-Booting Ubuntu

I've just bought a new Macbook Air (running Yosemite) and I am trying to create a partition from my Macintosh HD SSD for dual-booting Ubuntu. However when I try to create a partition in Disk ...
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1answer
52 views

Fix formatted GPT in SSD

I accidentally formatted my SSD's GPT while formatting a USB in Linux's gparted. Now, when running gpt in Mac's command line, this is how my SSD looks like: My-MacBook-Pro:~ user$ sudo gpt -r show ...
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1answer
103 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 ...
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1answer
50 views

Replace Recovery HD with a “bootable drive” formatted partition?

A while ago, I had the idea to use the bootable Mac OS X USB drive-making procedure on a hard drive partition, so that I could basically have a version of the “Recovery HD” that doesn’t need to ...
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1answer
119 views

Disk Utility not letting me partition my SSD or modify the current ones

Just yesterday I finally got my hands on a MacBook Pro in which I was planning to install Ubuntu and Windows aside from OS X for studying purposes. I was barely beginning by partitioning the disk, or ...
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1answer
42 views

GPT looks valid. Diskutil sees empty disk

External 3 TB disk. Stopped working after a power bump. GPT reports as follows: bash-3.2# gpt show /dev/disk6 start size index contents 0 1 PMBR ...
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1answer
37 views

Data recovery after interrupted partitioning

My MacBook Pro was working fine until my friend stopped the Disk Utility from partitioning and force quit the application. Ever since it seems that the problem has grown larger and larger as I used ...
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1answer
100 views

What is the recommended partition scheme for mac os x?

I did a clean install of yosemite on my MacBook Pro. I have not partitioned my hard drive and have left everything by default. I would however like to use the recommended schematic for Linux systems ...
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55 views

Fix Recursive Partition (Boot Camp Windows Partition Still Detected After Deletion)

I recently deleted the Windows Partition I had on my Macbook Pro (Mid 2014) which I had installed using Boot Camp. I followed the uninstall instructions in the second section of Apple's website, here. ...
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123 views

re expand a partitioned disk

The internal disk of my Mac book pro is partitioned as follows: % diskutil list /dev/disk0 #: TYPE NAME SIZE IDENTIFIER 0: ...
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1answer
183 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 ...
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1answer
235 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 ...
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1answer
42 views

How can I choose a specific location for Logic's 40GB of additional content?

I have an SSD onto which I've installed the operating system OS X 10.10.1, as well as my applications. I also have a much larger and much slower internal HDD for storage and other rarely-accessed ...
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1answer
108 views

Dropbox Install in Data Partition between OS X and Windows 7 Boot Camp

I have a Data partition between OS X Mavericks and Windows 7 Boot Camp. I have my Dropbox folder in the partition. I have tried using it in the past formatted as exFAT. This was unsatisfactory in that ...
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138 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 ...
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2answers
40 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 ...
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1answer
367 views

Fixing my external hard drive's partition map

Okay, so something really strange has happened, and it's a doozy, so please bear with me. Problem: I need to fix my hard drive's partition map So let me fill you in on what happened here. I ...
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2answers
44 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. ...
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1k views

Can't reduce size of OSX partition in bootcamp

I'm trying to install Windows 7 Pro (64 bit) onto my new macbook air (OSX Yosemite 10.10.2). I'm using the Boot Camp Assistant and am at the point where it's asking me to create a partition for ...
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1answer
674 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 ...
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1answer
61 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 ...
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37 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 ...
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307 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 ...
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1answer
94 views

Does Windows, running on latest Apple computers, see boot disk partitioned as MBR or GPT?

From my understanding, the newest apple computers boot Windows in EFI mode. Traditionally, Windows has seen the boot disk as an MBR partitioned disk. In fact, the boot disk (i.e. /dev/disk0) has aways ...
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3answers
369 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 ...