Creating a new disk formatting scheme or altering an existing scheme

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26 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 ...
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308 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 ...
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399 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 ...
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1answer
116 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 ...
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2answers
159 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 ...
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1answer
258 views

El Capitan Fat32 partition problem

I have a strange problem in El Capitan. I have a second internal drive which is divided into two partitions: one Fat32 and one HFS+ Journaled. I do not see this drive in console when I type diskutil ...
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1answer
183 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 '...
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1answer
260 views

Are all installations of OS X (10.8+) Case Insensitive (by default)?

I'm going to be getting a refurbished machine and rather than keep my current OS (10.6.8), I need to upgrade to at least 10.8, in order to be able to communicate with devices that use iOS 9 (since you ...
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1answer
506 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 ...
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1answer
44 views

How to create a new partition on FileVault disk on MacOS

I have a 500GB disk on MacOS encrypted with FileVault 2. I have successfully resized the disk to 250GB. Now I want to create another partition to install another MacOS on the 250GB free-space of the ...
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1answer
110 views

How can I encrypt a disk where diskutil cs convert reports “a problem”, leaves disk unreadable?

I'm trying to encrypt my Time Machine backup volume, but diskutil refuses, and leaves the disk unreadable (but repairable using Linux). How can I proceed? It's a Western Digital Elements 107C 3TB ...
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1answer
854 views

How do you fix missing partition on OS X El Cap?

After trying to install Windows 10 via Boot Camp, my Mac automatically rebooted (supposedly to the newly created Windows partition). However, it just booted back my OS X 10.11.2. When I went to Boot ...
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1answer
418 views

Can’t increase partition size of cloned volume in Mac OS X 10.11 (El Capitan)

I have a MacBook with a 120 GB SSD. I bought a new one with 240 GB. I cloned the content from the old one over with an ICY BOX cloning device. I inserted new SSD in the MacBook and everything is fine ...
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1answer
38 views

Not able to get a partition that fills SSD

I installed a 512GB SSD in my Macbook Pro. Unfortunately, I cannot seem to get a partition over 256GB. I tried a couple of time to erase it in recovery mode but it does not work. I just want one big ...
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130 views

How to recover corrupted HFS+ partition in external HD?

I've got a 1 TB SeaGate FreeAgent Drive with following partitions: 700 GB ExFAT (labelled as FREEAGENT1) 300 GB HFS+ (labelled as FREEAGENT2) While moving data from 1 to 2, it got accidentally ...
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1answer
504 views

Bootcamp: 'No Bootable Device error' after resizing partition El Capitan

I have a Macbook Pro (Retina 15 inch end 2013) with OS X El Capitan 10.11.1. I have Bootcamp on it to run Windows 7, always using it without any problem. I wanted more space on the Bootcamp partition ...
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1answer
828 views

Can't see FAT32 and NTFS external partitions on OS X El Capitan when SIP is enabled

I've installed Homebrew, FUSE for OS X and NTFS-3G. It helped to see external partitions (FAT32 and NTFS) when SIP is disabled (OS X El Capitan). But when SIP is enabled, I can't see NTFS and FAT32 ...
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1answer
781 views

BootCamp can't partition

I had a problem with my Macbook that couldn't read the internal SSD and boot OS X, but I solve it: MacBook does not mount, does not boot, does not read drive . I used resizeStack method to get the ...
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2answers
2k views

EFI system partition repair

I'm having a problem with the internal SSD on one of my Macs running 10.10. It was working fine when I was browsing the web one day and then suddenly froze with the spinning beachball; I couldn't ...
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0answers
95 views

How To Perform External USB Disk Clone

This question is similar to this one: Partitioning Software I have two WD 2TB external USB disks. The first is formatted for use as a backup disk for a Windows 7 netbook. Mac OS Disk Utility does ...
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1answer
278 views

Expanding a Fusion Drive partition

I created a partition on my Fusion Drive when I first purchased my iMac running Yosemite, and I would like to now resize that drive ("Data" in the screenshot below), but Disk Utility doesn't allow it (...
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1answer
358 views

I erased the partition where Windows 10 was previously installed. How can I merge it with my OS X partition?

So I started up Disk Utility and erased my BOOTCAMP partition and set the format to OS X Extended (Journaled). This is how my partitions look like now: As you can see, I have a BOOTCAMP partition (...
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1answer
525 views

How do I fix a corrupted USB drive on OS X?

I accidentally bumped the drive while repartitioning it and it unmounted. After that when I tried to repartition with Disk Utility I got Partition Failed with the error: Could not open device Now I ...
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1answer
39 views

Attempting to dual-boot Windows on late 2011 Mac but the partition number is greater than 4

I'm not sure what I'm supposed to do here. For some background knowledge, my late 2011 Mac does "not have UEFI firmware and the ability to boot Windows installers from USB flash drives until the ...
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2answers
1k views

Can't reformat SD card (Yosemite)

I have a 2 GB SD card that I can't reformat. It seems pretty corrupted. If I go into Disk Utility, I get these various error messages for each option: Repair Disk: Disk Utility can’t repair ...
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2answers
328 views

Partition map rebuild

I have an external hdd that doesn't mount anymore. I think I screw up with all the research I done and things I try. I have vital info on this hdd and I'm really afraid to lose it. I tried this: ...
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19 views

Can't remove partition on Macbook

I can't delete a partition on my macbook. On my main hard disk, I selected the partition I want to delete however I can't click on the '-' symbole. I already read a topic talking about a similar ...
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65 views

How to fix GUID hard drive corrupted to MBR?

I have a micro SD that suddenly stopped working. I tried everything on the internet (believe me, everything). I don't mind losing the data on it, I just want to be able to use it again. So here I go: ...
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1answer
118 views

Boot camp install of Windows 7 issue, no bootable devices (virtualbox fix please)

I'm on a MacBookPro8,1, Late 2011 and I'm running latest version of El Capitan with SIP disabled (if that matters at all) @DavidAnderson I've been following the tutorial steps from @DavidAnderson ...
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0answers
26 views

2 Disks with the same name, how do I delete one?

I initially boot-camped a disk into a windows partition, and wanted to delete it. Initially I thought formatting it to free space would work, but it didn't. I tried again and accidentally formatted it ...
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1answer
589 views

Resize 'Macintosh HD" into unallocated space vacated by Bootcamp partition

I have a Boot Camp partition on my MBP. When initially setting up the Boot Camp installation I set this partition to be quite large but now I wish to utilise more of that space in the Macintosh HD ...
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29 views

Is there any way to boot from my BootCamp Partition after installing Ubuntu MATE?

So I've been running BootCamp on a 13-Inch Late 2007 MacBook for a while now using these instructions and everything was working fine. (Of course, I still have my Mac Partition.) However, yesterday I ...
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46 views

Time Machine Partition gone from external hard drive, can't repartition

I've got a 1TB external drive which used to have two partitions: One formatted in NTFS to share files between Mac and Windows, and one for Time Machine Backups. I haven't used it in quite some time. ...
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1answer
606 views

Mac Crashes During Boot Camp Assistant Disk Partitioning

The other day I was using Boot Camp Assistant to partition my 2015 MBP to dual-boot Windows 10. I came back to discover my Mac was had just crashed and rebooting. I knew this could have gone very ...
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1answer
261 views

How to format multiple exFAT partitions on USB drive?

I'm following the instructions in Creating a bootable Clonezilla dual partition USB device but using my Mac laptop running El-Capitan. I managed to create an MBR partition table and two partitions on ...
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41 views

I can't boot my iMac to Mac OS X

I have Windows (Boot Camp) installed. So I ran out of storage and thought about partitioning my Mac's part of drive. I partitioned my Mac's drive and set Windows to boot by default. Once I lost ...
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57 views

EFI Boot icon on startup menu

I completely removed Boot Camp partition from my MBP (by DiskUtil). Everything is OK, but now when I start the system with the boot menu I see the "EFI Boot" icon instead "Windows" drive. What does it ...
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49 views

MacPro internal HD unreadable when moved to external USB Dock - and vice-versa

Since I just installed a NAS, and I want to transfer several TB from my Mac Pro's internal hard disks (4 of them), I wanted to make it faster by connecting those hard disks directly to the NAS using ...
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1answer
275 views

Crashed when creating a partition - now missing drive space!

Just a couple of hours ago, while I was taking a GNU course, I decided to create a partition on my SSD to have ubuntu installed, meanwhile the disk utility was doing that, suddenly it just crashed and ...
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1answer
70 views

Cannot extend partition after failed bootcamp install

I got an error while trying to install Windows 10 on my Mid 2014 Macbook Pro via Bootcamp Assistant. The error occurred whilst partitioning the disk: Your disk could not be partitioned. An error ...
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1answer
188 views

Windows 10 will not boot anymore

Urgent! I have an existing Windows 10 installation via Bootcamp which has been on my Mac for months without issue. However for ages I have been wanting to read my Mac partition from Windows which it ...
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1answer
290 views

How to change the “Recovery HD” partition to type “Apple_Boot”?

Typing in the terminal diskutil list gives me this... /dev/disk0 (internal, physical): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme ...
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95 views

Cannot either mount or repair greyed out partition

As a likely symptom, I started boot camp earlier in today to install a dual boot Windows on my machine and the install/remove Windows option was greyed out and I could not select it. After that, I ...
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2answers
2k views

Can't Delete Partition

I created a partition to run Snow Leopard on my computer running El Capitan and no longer need it. I allocated 20GB to that partition. Here's what I've done. I first go into Disk Utility, select my ...
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1answer
308 views

Cannot unmount disk0 resource busy

I am unable to wipe my hard drive and install new OS X as the resource is busy. I would imagine this is because I have Recovery open on this disk and that's why it is busy. I've tried: diskutil ...
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1answer
693 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 ...
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540 views

Mac won't boot Windows partition after using disk utility

I needed more space on my Windows partition... So I used Disk Utility to free up some space from the OS X partition, and upon restarting to Windows in order to add the free space to windows, I ...
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1answer
80 views

Boot Into Recovery Partition After Installing Linux.

I want to install Linux on my mid 2014 Macbook Pro for educational purposes. However, I don't want this to be permanent. I've tried to partition the hard drive and install both OSs but I have not ...
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78 views

Free space not showing in Disk Utility after Boot Camp Error

I recently tried removing my Bootcamp partition via the Boot Camp utility. It gave me an error and did not restore my OSX partition to full size. I tried going into Disk Utility to manually restore ...
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34 views

Unsuccessful installation of Win 10 via Boot Camp

I've tried to install win 10 using Boot Camp but something went wrong, win installer couldn't create partition so I've canceled the process. Now I'm missing ~80gb of space and I have no idea where ...