Creating a new disk formatting scheme or altering an existing scheme

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2
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1answer
33 views

How to create a FAT16 partition on an SD card with OS X El Capitan?

I want to prepare an SD card for use in an old camera using CHDK. The card needs to be FAT16 formatted. This doesn’t work from Terminal anymore, maybe already for years. Disk Utility provides ''FAT'', ...
0
votes
0answers
16 views

A new ExFAT partition prevents bootcamp from starting windows

I'm trying to create a shared partition that I can use from both Windows and OS X. I made a new partition, but if I make it FAT or ExFAT Windows does not start. I get Error code: 0xc000000e. I assume ...
0
votes
0answers
19 views

Need help fixing hard disk partition map

I have a 500GB Samsung 840 PRO SSD drive. Until recently it was the primary hard disk in my Macbook Pro (late 2011 17"). I got a 1TB SSD which I decided to use as my primary drive instead, and put the ...
1
vote
2answers
324 views

Unable to delete the core storage local volume group

Currently, I'm trying to delete one of my partitions but for some reason it's giving me this issue: Does anyone know how I could go about clearing this?
1
vote
3answers
3k views

Couldn't Modify Partition Map using external disk

Seems the most common relationship to this error is using Windows on a separate partition. Here is my problem. I have a 1 TB external disk that was used half for Time Machine and half for general ...
0
votes
1answer
20 views

How to partition a pen drive with Disk Utility in El Capitan?

I've a 16 GB pen drive and I want to partition it like this: two MBR partitions: FAT - 1GB default (HFS Plus journaled) - remaining. How to do this in El Capitan?
0
votes
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 ...
4
votes
1answer
75 views

Remove Ubuntu and grow Mac partition

I'm new to the whole Mac world, and the first thing I did when I got my MacBook Air 2015 was I installed Ubuntu, but have regretted it now and want to remove it and get my space back into the Mac ...
0
votes
0answers
19 views

Delete button for partition not clickable in Disk Utility

I had another partition on my MacBook where I had Windows installed (the partition is called BOOTCAMP). I am not using Windows at all any more, so I would like to delete the partition on my hard disk ...
0
votes
0answers
18 views

Way too many disks in rEFInd?

I'm using rEFInd on my mac that is installed on its own partition. Everything works fine except when I boot into rEFInd (the "EFI Boot" option under the disk selection menu on startup) it shows my OS ...
0
votes
1answer
25 views

How to mount ufsd_NTFS partition

I have a USB disk and when I try to mount get the following error mount: /dev/disk3s1: unknown special file or file system. diskutil shows /dev/disk3 (external, physical): #: ...
3
votes
2answers
6k 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
votes
2answers
5k 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
votes
1answer
38 views

How to remove partition on SD card using a Mac?

I got Raspbian on a SD card, and then accidentally wiped it. Now I have 2 visible partition. How do I get rid of the partition on a Mac.
1
vote
1answer
54 views

Cannot use Disk Utility to create partition from free space on external USB drive

I have a 3 TB Western Digital red disk in a USB hard drive dock. The drive is GPT, and I have two volumes on it (one volume is "Microsoft Reserved", other volume is NTFS). The other part of my drive ...
0
votes
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 ...
1
vote
2answers
9k views

How to partition an SSD that fails with error 69888 - couldn't unmount disk?

I erased the SSD drive in my MacBook and was reinstalling Lion when it failed about 75% through the install. Now in Disk Utility, sometimes I see the SSD drive and sometimes I boot and it's not there ...
-1
votes
0answers
51 views

How to restore my Macbook Air thoroughly without a OS X recovery partition?

I brought my Macbook Air(Mid 2015) July 2015. Then I started endlessly installing different linux distributions on it. One day, I make a mistake and my OS X recovery partition was deleted. Now I ...
0
votes
1answer
24 views

External drive is damaged and freezes my Mac. Any way to recover?

I'll explain everything in a clearer way. I have a WD My Passport Studio external hd, since a while it's impossible to read it and here's the symptoms: When I mount it and try to open the main ...
3
votes
3answers
6k views

Mount Ext4 on El Capitan

I recently installed OS X 10.11 on my Mac. I tried to read a SD card with an Ext4 partition which wasn't even shown in Disk Utility, although diskutil did show it as a Linux partition. I can't seem ...
0
votes
0answers
36 views

Delete bootcamp from my Mac HD

I've been trying to install Windows onto my Mac but it didn't work. It shows me an error after it was installing, I click on formatting the Bootcamp on the drive where they asked me where I wanted my ...
2
votes
2answers
3k 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 ...
0
votes
1answer
68 views

Ghost partition, Windows BSOD

Today I was trying to set up Windows on my MacBook Pro (15", Late 2011) over BootCamp. I used the modified Info.plist-trick to create a bootable Windows 8 USB-drive and create a Bootcamp partition. ...
1
vote
2answers
963 views

How to install Windows 10 on external SSD that currently runs OS X?

I made the mistake of purchasing a MBP w/ only 128 GB of storage. When I ran out of space on the internal drive, I purchased a 512 GB external SSD, transferred all the data over to the SSD, and now ...
2
votes
4answers
6k 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 ...
3
votes
1answer
81 views

Accidentaly converted from a basic disk to a dynamic one

I got a MacBook Pro (13-inch late 2013 retina) So I installed Windows 7 using bootcamp and all was fine. I then needed to create a 32MB FAT16 partition, when Windows prompted me to convert to a ...
1
vote
2answers
75 views

Fusion drive is not working although the system can find the SSD

I own an iMac late 2013 with a fusion drive. Recently I installed Windows 8.1 using Bootcamp on a separate partition on my disk. After a few days, the booting process of OS X started failing and I had ...
1
vote
1answer
163 views

Missing Mac partitions - unrecognized file system

Apparently, I installed Windows 7 via bootcamp and created a new partition in Windows (which probably affected the partition table). After restart, I can't see Macintosh HD in startup disk (it only ...
1
vote
2answers
39 views

Missing disk space after repartitioning

I tried to make a partition and then tried to undo it. Now, I don't know how to get the missing disk space back. As you can tell, I have 751.28 GB disk. Macintosh HD and Recovery HD have 557.4 GB. ...
0
votes
1answer
1k views

how can i reformat the hdd in HFS+ using Ubuntu without using mac

I have input a HFS+ hard drive which is mac osx into ubuntu because while booting up mac there a error of blinking folder with a question mark so i searched in google and the information say that the ...
1
vote
1answer
180 views

Partition Map Failed Because No Slices Were Found

I have an external hard drive that I've used with my Mac for years, with no issues. Today I tried to plug it into my work PC to get some files off it (Windows 8), and it wasn't recognized. I tried to ...
0
votes
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: ...
1
vote
0answers
30 views

Recover deleted filevault2 partition

I accidentally deleted my partition with my main OS. The partition is FileVault-encrypted. I formatted the hard drive while starting from an external OS X. I am using Mac OS X Yosemite. I still know ...
0
votes
0answers
57 views

Can't make new partition due to error “volume Macintosh HD was found corrupt and needs to be repaired”

When I run Disk Utility on my 2012 MBP (SSD, running El Capitan) I sometimes get the error: The volume Macintosh HD was found corrupt and needs to be repaired. Other times, I get no errors. ...
0
votes
0answers
38 views

El Capitan issue reclaiming Free Space using Disk Utility

This morning I attempted to remove my BOOTCAMP partition of size 65gb. I believe I was successful in that the BOOTCAMP partition is no longer bootable and the disk space was erased. However, I am ...
16
votes
2answers
6k views

Can you make OSX mount just certain partitions when you connect an external HDD?

I have an external HDD with 4 partitions. My question is the following: is there a way of telling the OS to mount just two of them (One FAT and one HFS+) when I connect the HDD? It is rather annoying ...
0
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0answers
6 views

Unmount disc (partition) on connection [duplicate]

When I connect my external harddrive, I don't want my "Dual Boot" partition to show up.
0
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0answers
11 views

El Captain Partition removal won't work

I want to remove a partition but the disk utility won't let me and I can't figure out why. Here is the terminal output I want to remove the untitled partition I have created a backup... If I start ...
0
votes
1answer
18 views

MacBook turned off during Time Machine initial back up - What do I do?

My external hard disk was partitioned to 3 partitions and one of which (300 GB) was set up with Time Machine. The initial back up started and was 3 hours through (around 65% of 211 GB complete). I ...
2
votes
1answer
6k views

Boot Camp Windows partition lost after El Capitan upgrade

I upgraded through App Store, and after the upgrade, the boot select screen no longer shows my Windows partition, nor the recovery disk. Running diskutil list yields the following: /dev/disk0 ...
0
votes
1answer
30 views

Disk utility will not allow me to resize a partition on an unencrypted external hard drive

I want to back up a copy of Windows onto a new partition of external hard drive currently formatted in exFAT. I don't know how to use Windows, so I want to use my Mac (mid-2009 MacBook Pro, running ...
0
votes
0answers
26 views

Regain access to OR get rid of Windows, Linux partitions

(Note: this question is regarding an early 2015 MacBook Air (256 GB 2.2 GHz) running OS X Yosemite 10.10.3) I have happily been running my laptop dual booted with windows - installed as 8.1 Pro, ...
4
votes
4answers
13k views

How long should Boot Camp formatting selecting drive take?

I'm trying to install Windows 7 using Boot Camp Assistant. Now the boot camp is on task "Formatting the selected drive" and it has been going on three hours and it is not even on the half way. How ...
0
votes
1answer
3k 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 ...
0
votes
0answers
22 views

Unable to boot into mac or bootcamp

Installed bootcamp and wanted to share files with the mac side. One of my friend told me to create a FAT partition so that I can share files between mac and windows easily. I was stupid to create a ...
0
votes
0answers
72 views

Reclaim unallocated disk space on El Capitan?

So I decided to dual boot Ubuntu and OS X using rEFInd a few month ago. I originally partitioned about 15 gigs for Ubuntu, but I later decided I didn't need that much space. I used a live stick to run ...
0
votes
0answers
54 views

bootcamp - stuck at “Partitioning Disk”

I tried to quit bootcamp, open recovery mode then verify & repair disk and both run smoothly without any problem. But when I run bootcamp, the process always stuck at this same point I have ...
0
votes
1answer
39 views

Can I enable FileVault and then partition my hard drive later?

I just bought a 2014 MacBook Pro with a 512GB SSD. I updated to El Capitan today and when it booted up for the first time, it asked me if I wanted to enable FileVault. I chose not to because I wasn't ...
0
votes
0answers
7k 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 ...
0
votes
1answer
77 views

Problem with 3 TB Fusion Drive, it can't be deleted, formatted or partitioned

I want to clarify that I already followed the instruction with I think I messed up the Fusion Drive on my 1TB iMac (with BootCamp) but I think I have mayor problems. I followed the instructions to ...