Creating a new disk formatting scheme or altering an existing scheme

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237 views

How to use Testdisk under OS X recovery mode?

I accidentally broke the GUID, I suppose, when I was trying to solve the incorrect EFI partition problem. What I have now is: Disk1 is a 4 GB thumb drive with a recovery partition (disk1s2) I ...
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505 views

Error: -69711 this operation couldn't proceed because the target's boot helper was mounted; you may want to try again

I have a MacBook Pro 8,1 (13", 2011 unibody) running Yosemite (no upgrades). Tried to partition my SSD hard drive and it threw an error when it was almost through saying it can't find the partition. ...
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130 views

how to resolve disk partition issue in OSX 10.10.5?

Using Boot camp assistant I have created a partition and installed Windows 7 OS to work on both Mac as well as windows (Dual boot). But later on deleted the windows OS partition(Could not remember how ...
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2answers
446 views

Repair MBR (Windows 10) from OS X

I've messed up my system yesterday. On my iMac I have installed OS X and Windows 10 using Boot Camp Assistant. The Windows MBR is damaged and I can't start it anymore. I get a black screen with the ...
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1answer
283 views

How to change the GPT partition type of an EFI partition?

I have a perplexing problem with the EFI partition on my boot SSD. The GPT partition type is "Microsoft Basic Data". On all other drives in my system, including my Carbon Copy Cloner clone of my boot ...
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1answer
100 views

Boot from external USB3

I've recently bought an usb3 flash drive where I've put a live kali linux distribution. When I try to boot my early 2015 mac book pro (with Yosemite) from this usb3 drive I have two options: windows ...
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1answer
96 views

Reclaim SSD space from deleted partition

I have a very similar problem to one that was answered here, but I don't know how to apply the answer to my mac. MacBook Pro 15", Late 2013, 2.3GHz/16GB/512GB, Yosemite 10.10.3 I was attempting to ...
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2answers
56 views

How do I restore a Time Machine backup after repartitioning the original drive?

My goal is to backup my data by Time Machine, perform a clean install of Yosemite, partition the disk and restore some of the data. Right now my setup is only one partition. After a new setup I want ...
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2answers
198 views

Rebuild partition table on external HDD - not writable

I have an external hard drive formatted with 3 HFS+ partitions. To cut a long story short I had it connected to a Windows PC and accidentally started formatting the drive to NTFS. As soon as I ...
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2answers
465 views

Minimum Space for Boot Camp Windows 8.1

I have a Macbook Pro 2014 13-inch 128 GB and I want to install Windows 8.1 and Visual Studio 2013 Community via Boot Camp. I am Mac user and use my Mac for iOS development. Now I have to learn Windows ...
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15 views

Use diskutil without firmware password

Diskutil found some problems on my drive that need to be fixed in recovery mode. However the it department installed a password in the firmware. Is there anyway to start diskutil without the ...
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0answers
7 views

How can I re-allocate the whole space for just one partition? [duplicate]

I'm running OX X 10.10.5 on my MBP with 500GB SSD. When I initially configured the computer I've created a setup with a boot loader so I was able to boot into Linux too. Since I'm using virtual ...
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2answers
1k views

Install windows 10 on bootcamp fails

Im trying to install windows 10 with bootcamp. But what i`m trying it wil not work. I hope some one can help me. When i create a bootable USB via bootcamp this all works wel. than i delete the ...
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2answers
99 views

Time Machine restore to new partition, different computer

I split my macpro disk into 2 partitions. I wish to continue to use partition 1 as a 10.6.8 (Mountain Lion) system. I wish restore everything (O/S, data, etc.) from a Time Machine backup, from a ...
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0answers
29 views

OSX Yosemite upgrade error: “a mismatch between the MBR and GPT partition maps…”

I started following the procedure that was given after installing gdisk and got to the point where I comparing MBR and GPT values. Unlike all the posts I have seen, my MBR Partition table shows 3 ...
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54 views

Bootcamp no longer bootable after I fixed GPT/MBR mismatch error

I had an error which prevented me from upgrading my system, so I did a few commands with gdisk to fix it, but now bootcamp is no longer bootable. When I boot into it, (it doesn't appear when holding ...
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1answer
676 views

How to create a new partition for OS X, then remove the original one

I want to clean install a new version of OS X, so I was thinking to create a separate partition, transfer all applications and settings from my old system and then remove the old partition and make a ...
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1answer
142 views

Recovery HD present but can't boot from it

I fiddled with partitions on my MacBook Pro with OS X Yosemite, but now I'd like to reinstall the OS to restore original setup. Recovery HD is there, but if I press CMD + R at boot, Internet Recovery ...
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1answer
235 views

BOOTCAMP partition cannot be mounted

After working in Windows for a couple of days, then booting back to OSX - I cannot mount my BOOTCAMP partition in Mac OS X any more. Disk utility shows BOOTCAMP as "greyed out". Trying to mount throws ...
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48 views

Un-partition Core Storage MacBook Pro disk

I'm having serious issues with my MacBook Pro. For some reason it has been partitioned odd and I no longer have access to the recovery partition when holding the option key. I had a look at the ...
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0answers
49 views

How to recover a shared (OS X-Win) FAT partition?

How can I recover a FAT partition originally created under OS X and used mainly from Bootcamp Windows which now looks as follows: OS X diskutility shows it in grey, as unmounted partition disk0s4 ...
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1answer
2k views

Can't boot into Mac OS after Windows install via Bootcamp

I just installed Windows 10 successfully via BootCamp. Now I am neither able to boot into OSX, nor is its partition shown anywhere. Turns out the issue occurs because of a mistake I made during the ...
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43 views

Bootcamp problems have left my hard drive a mess

I have been trying to install Windows 8.1 via Bootcamp, and have had several problems that have resulted in failures (those are perhaps a different post). I'm using Yosemite. Currently when I run ...
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1answer
126 views

Resizing HFS+ volume after cloning

I cloned a disk containing an HFS+ volume to a larger disk using the command line dd utility. Now I want to grow the HFS+ volume to fill the new disk. There's an EFI partition before the HFS+ volume ...
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1answer
102 views

Can't delete empty partition

I've searched around on here and viewed posts such as: I deleted my Bootcamp partition but can't resize my OS X partition Can't ever remove partition? The second one looked most promising, ...
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1answer
267 views

Resize Mac Partition is Disabled - how to partition properly

I have two partitions on my mac book pro. One partition is running os Yosemite and other one is running bootcamp windows 8.1. Yosemite is 75GB and Bootcamp has 673GB. I shrinked the windows partition ...
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1answer
138 views

How to fix my partition table after messing it up trying to install Linux Mint

I tried to install Linux Mint alongside my working OS X Yosemite. I have a Macbook Air released mid 2013 with a 128gb SSD and 4gb of memory. Well to achieve my aim I first added a partition using ...
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66 views

Move the beginning of HFS+ partition

What I'm trying to do is move the beginning of the partition on an external HD drive. I have an external HD drive with two HFS+ partitions on it. I want to grow the first one at expense of the second ...
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1answer
131 views

Dual boot Macbook Pro MD101 (Mid 2012), with OSX and Bootcamp windows and a FAT32 shared partition

I tried this and my hard disk looks something like this: Vikrams-MacBook-Pro:~ Vikramguria$ diskutil list /dev/disk0 #: TYPE NAME SIZE IDENTIFIER ...
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1answer
41 views

How to remove windows partition without having to erase the other one?

I have an imac late 2013 with a fusion drive. I've created a windows 10 partition and I'd like to delete it. I tried with bootcamp and disk utility but as you've probably heard before, it came up with ...
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1answer
215 views

Disk Utility reading disk incorrectly; viewing ext4 as JHFS+ and seeing Recovery HD

This is imported from Superuser, I felt like I would have an easier time getting an answer here than in Superuser - it is copy pasted, as below. So, I have some strange issues in Disk Utility and ...
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139 views

HFS+ external drive missing EFI, will not mount on Mac

First off: Fear not, I have everything from this drive backed up. I'm just trying to reformat it, but I had someone else attempt it on Windows which doesn't look like it helped. I'm a novice but ...
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3answers
110 views

Can't create a partition

I'm trying to create a new partition for installing linux, but OSX won't let me. I saw this question: Unable to Resize Partitions, but my HD is not a CoreStorage Volume, so it didn't really help. ...
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1answer
49 views

Cannot Partition Disk with Disk Utility

I can't seem to partition my disk with Disk Utility or with the Terminal command (see screenshots). Something also happened to my other partition running Mavericks, where it just turned into an "empty ...
4
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1answer
706 views

how to fix GUID hard drive corrupted to MBR

I am on OS X 10.9.5 with a late 2013 iMac. I have a 3TB hard drive that has an unusual problem. It is a Western Digital 3TB Red WD30EFRX. I formatted it with two partitions, both 1.5TB. One was a ...
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2answers
183 views

Unable to install Windows 8.1 using Bootcamp, system volume doesn't contain required free space?

I'm unable to install Windows 8.1 using Bootcamp on my 2015 MacBook Air. The installer says setup was unable to use the existing partition because the system volumes doesn't contain the required free ...
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1answer
4k views

Create Windows 10 installer USB without bootcamp

I have recently wiped my hard drive and partitioned my hard drive like this: /dev/disk0 (internal, physical): #: TYPE NAME SIZE IDENTIFIER 0: ...
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1answer
149 views

Why can I only have 2 partitions on my 3TB Apple Fusion Drive?

According to Apple, I can only have 2 partitions on my 3 TB Fusion Drive. I do not understand why. Techtool Pro made an eDrive, their emergency boot drive, and Apple made their Recovery HD. It ...
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1answer
20 views

I cannot do bootcamp but my hard disk only have machintos HD and Data

The bootcamp said that my disk cannot be partitioned or restored as single partition. I am using macbook pro 15" but idk the version but the graphic card said gt320m 256 MB and 350 GB HDD i5 do i ...
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4answers
16k views

Windows on BootCamp cannot start upon a fresh installation

I have a Windows 7 .iso I always use for BootCamp installations. It works. I have a MacBook Pro Retina 15" Mid-2014, and I have installed Windows 7 in it successfully in the past. Throughout the ...
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1answer
45 views

dd cloned NTFS partition not working

I have a MacBook Pro with OS X 10.10 and a Windows 7 Boot Camp install. I just bought a 64 GB flash drive that I would like to put a bootable copy of Windows on, to reestablish the hard drive as OS X ...
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1answer
114 views

Can't edit partitions with Disk Utility in OS X 10.10

I'm having trouble accessing about 50GB of space on my computer after a failed partitioning attempt. Before you ask, I don't know what went wrong, I just know that now, I can only turn the free space ...
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1answer
53 views

Disk Utility not letting me Partition Disk

A bit of background before I start. I'm trying to install Ubuntu onto my Macbook Pro and so far I've stumbled into a bit of a roadblock. I've also already installed Windows 10 with Bootcamp, I'm not ...
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1answer
647 views

I think I accidentally erased Macintosh HD?

I was trying to install OS X on my Mac that had OS X removed. I wrongly erased Macintosh HD and it changed to "Untitled". After that I restarted my Mac and it just shows an image of "?" in a folder. ...
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1answer
147 views

Boot Camp disk can not be partitioned

I'm trying to install Windows 10 on my Mid-2012 MacBook Air running OS X 10.10.5 "Yosemite". When creating the partition, Boot Camp stops after a short while displaying that the partition can not be ...
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455 views

Boot Camp Partition Unavailable After Windows 10 Upgrade

I have a simple problem for you today. I have been using Boot Camp with my Mac Mini for about two years and now, after upgrade from Windows 8.1 to Windows 10, the Boot Camp partition doesn't seem to ...
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2answers
730 views

OSX Yosemite upgrade error: “a mismatch between the MBR and GPT partition maps…”

My MBP's HDD is half OSX and the other half is Bootcamp. While booted into OSX I decided to let Software Update install Yosemite. I left the room. Upon returning a while later I found the following ...
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1answer
152 views

How can I prevent an exFAT volume from mounting on OS X?

I have two partitions, one is HFS+ and the other is exFAT. I'm used to opening the /etc/fstab file, and inserting this line: UUID=NUMBER none hfs rw,noauto Note: The "hfs" stands for HFS+. Now I ...
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0answers
21 views

How do I resize my partition on my Mac? [duplicate]

I'm having trouble resizing my hard drive partition. Before, I was running OS X Lion in the free space above Macintosh HD 2. Now that I deleted the Lion partition, I am unable to resize Macintosh HD ...
0
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1answer
53 views

Bootcamp Installation Space

I'm installing Windows via Bootcamp but during the partitioning, my MacBook Pro crashed and now after the reboot I'm seeing that I only have 15GB of free space left. I had 33GB before partitioning. ...