Creating a new disk formatting scheme or altering an existing scheme

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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 ...
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4answers
2k views

How to delete partition disk0s4?

A while ago, I dual booted with ubuntu linux and followed a tutorial on youtube to do so, but later I wanted all of my hard drive to be for osx, so I deleted the ubuntu partition, but now I am left ...
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1answer
29 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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3answers
13k views

Bypassing Boot Camp to install Windows using a non-standard partition scheme

My new Retina MacBook Pro is on its way, giving me time to contemplate setting it up. Good thing I got started—I had no idea how difficult it was going to be to install Windows and create an auxiliary ...
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2answers
2k views

Why does Disk Utility create EFI partitions on external disks?

A technical told me about the EFI partition that... ...it's only there in case your computer will do an EFI update so the update files can be loaded onto the EFI partition. This is consistant with ...
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3answers
5k views

Resizing or expanding a CoreStorage volume

I bought a new SSD with 750 GB and made two partitions: 600 GB and 150 GB. The smaller one was thought to be a Bootcamp partition one day, but to date it was just another unused partition. When I ...
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1answer
76 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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3answers
4k views

partition map check failed because no slices were found

I own an early 2011 MacBook Pro running Mac OS X Mavericks. Recently, I tried to make 50 GB partition using Disk Utility but the whole process didn't complete, and I had to restart the system as it ...
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1answer
4k 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 ...
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1answer
790 views

Disk Utility won't let me create or resize partitions

My MacBook Pro 13" Late 2011 is running Yosemite. I am trying to install a Linux distribution on a partition of my hard drive. I used Disk Utility to resize the main partition on my hard drive and it ...
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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 ...
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1answer
23 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
94 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
59 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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2answers
3k 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 ...
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0answers
35 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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1answer
104 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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3answers
8k views

BootCamp, can't partition SSD

I've upgraded my OS X to the latest Yosemite GM Candidate and cannot for the life of me figure out how to partition my SSD for BootCamp. Here are some screenshots of the problem: And when i try to ...
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1answer
123 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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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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2answers
6k 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
934 views

Erasing partition doesn't give me free diskspace

I'm using a Macbook Air and until today I had two partitions on it (not counting the restore partition). I had my OSX partition and an Ubuntu partition. As I don't use Ubuntu anymore, I decided to ...
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5answers
4k views

Disk Utility hangs prior to resizing partition

When trying to shrink the size of a partition, the period before the actual resizing happens (where Disk Utility says "Preparing to partition disk") hangs forever. I dug into Console to see what was ...
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1answer
24 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 ...
0
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1answer
665 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
68 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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2answers
30 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
200 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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0answers
65 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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3answers
2k views

What is the minimum partition size for Mac OS 10.10 Yosemite?

I'm about to set up a Mac mini to dual boot Mavericks and Yosemite for software development purposes. What's the recommended minimum size of a Yosemite partition?
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2answers
3k 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 ...
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2answers
33 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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2answers
3k 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 ...
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1answer
4k 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 ...
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1answer
344 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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1answer
51 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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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 ...
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1answer
160 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 ...
3
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2answers
436 views

I think I messed up the Fusion Drive on my 1TB iMac (with BootCamp)

this is a somewhat similar post to this one (Can't create partition on free space with Disk Utility) but not quite... It started with me creating a BootCamp partition (around 145 GB) for Windows ...
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1answer
32 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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3answers
3k views

How to repair Mac partitions without Internet Recovery and Rescue USB?

Resizing the C:\ drive under Windows(bootcamp) corrupted mac partitions. Neither Mac OS X nor Windows are able to boot. Holding the Option(ALT) key shows only Windows, which can't boot. Internet ...
12
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7answers
43k 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 ...
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3answers
6k views

Are there any advantages to partitioning a SSD on a Mac?

I have a Macbook Air with 128GB SSD. It's used to be a best practice to put the OS on a separate partition from data. Does that make any sense? What are the advantages to partitioning an SSD?
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3answers
205 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 ...
0
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1answer
78 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 ...
0
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2answers
221 views

Unable to shrink a partition in osx 10.10

Hi, I installed windows using bootcamp, but i made the mistake to make the bootcamp only 20gb, so i want to expand it. I found a way to do so, but firstly i need to shrink my other partition - ...
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2answers
79k views

What is the 'Mac OS X Base System' disk image on my 2011 MacBook AIr?

On my 2011 MacBook Air with Mac OS X Lion, and I boot into Recovery mode via holding the command-R key during startup, if I go into Terminal and do a diskutil list, I get a list of 12(!) logical ...
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1answer
13k views

Black screen when installing Boot Camp?

I recently did a complete wipe of my late 2009 MBP and restore using a Time Machine backup, so I would have uninterupted space at the end of the drive for creating a Boot Camp partition. The Boot Camp ...
3
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3answers
3k views

Yosemite Disk Utility: You may only split this volume in two

I just upgraded to 10.10- Yosemite. I have an external 4TB hard drive. These are the problems I see with Disk Utility: No more than two partitions are allowed. Changing the partition size I can ...
0
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1answer
154 views

Problem while trying to export iTunes library to an xml file (on OS X 10.8, iTunes 11.1.3)

Short version: When I try to export iTunes library to an xml file, iTunes creates a temporary file (called iTunes export.tmp) and it quickly disappears and I don't get any xml file... Long version: I ...