Creating a new disk formatting scheme or altering an existing scheme

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1answer
167 views

Fusion Drive with missing partition

Initially my Fusion drive (1TB data disk + 240 GB SSD) consisted of a single partition where it was installed El Capitan, then I split the fusion drive into two partitions, the second partition I ...
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1answer
40 views

Unable to access neither Partition Layout nor Option tab in Partition tab on Disk Utility

I have a problem that I cannot select Option tab in Partition tab as shown in above screenshot. I wanted to convert my external hard disk to GUID partition table. Thank you in advance for your help. ...
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0answers
13 views

Unable to install El Capitan on my MacBook Pro [duplicate]

I have a MBPR Mid 2014, 8 GB RAM, Core i5 This is how my Macintosh HD looks like: And every time I try to install "El Capitan" final App Store release version I get: "This core operation is not ...
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0answers
55 views

External disc partitioning gone wrong

I would appreciate any help as this situation is beyond my skills. I was trying to follow an internet instruction for putting an OS X Installation on my WD external drive using my MacBook, to ...
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2answers
134 views

Disk Utility stuck at exit code 0 during partition restore (in Recovery Mode)

I have an iMac running OS X El Capitan. I tried to use the disk utility in normal boot to restore two partitions into one but it would exit with an error (exit code 8) and delete the second ...
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1answer
3k views

Unable to install Boot Camp 6 Update for Windows 10 due an invalid signature

I previously upgraded to Windows 10 on my MacBook Pro (Mid 2012)'s Windows (former W7) Partition. Sadly I'm unable to install the BootCamp 6 update - it fails during the installation. Following error ...
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0answers
59 views

Scripting a Partition Scheme for CoreStorage - Mac

I've read a lot of information about the CoreStorage/Fusion Drive setup. In our environment, we work on a multitude of configurations of Macs, many with multiple operating systems on them. As such, ...
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1answer
173 views

Boot Camp failed and reduced Macintosh HD partition from 3TB to 1,46TB

What went wrong? I created a new partition with Boot Camp Assistant (OS X 2,25TB | WIN 850GB), but during the partition process, the iMac suddenly restarted. When it got back on the Fusion Drive's ...
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1answer
173 views

Help partitioning “free space” with utility disk

I've been trying to partition my harddrive to have ~50 gb of unallocated space (right now there's one partition with the operating system on it, so I would like to have that plus the free space). This ...
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1answer
54 views

Is there an easy way to install Linux similar to Boot Camp?

I've so far been using Disk Utility to partition my Mac's drive and install Linux, but is there an easier way to do it, using something similar to Boot Camp, or a third-party software application that ...
0
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1answer
70 views

How do I install Windows with Bootcamp?

I am using El Capitan on a 15" MacBook Pro mid 2015. I downloaded a Windows 10 iso file from the Microsoft website. Then I used Boot Camp Assistant and selected the file. I allocated 120 GB to the ...
2
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1answer
1k views

Can I restore one partition of OS X El Capitan?

I'm trying to install Windows 10 on El Capitan using Boot Camp, I could create the partition, but I need to remove this partition. When I try to enter in Boot Camp again, it shows next error: You ...
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1answer
78 views

How to resize the main volume to its original or full size?

I followed the instructions mentioned in one of the threads on this community to expand the Macintosh HD volume to its full volume. I rebooted with cmdR to Recovery Mode, opened Terminal, entered ...
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0answers
19 views

How to fix this hard disk on a virtual machine?

I have been using OSX on a virtual machine for some time, for developing purposes. From today, I'm starting to have hard disk issues. The Disk Utility Tool says that the hard disk has 107.37 GB, but I ...
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1answer
3k views

Bootcamp Failing with Error: “The startup disk cannot be partitioned or restored to a single partition.”

I have a 21.5" Mid-2010 iMac i3 in which I am trying to install Windows 8 on. When I went into bootcamp, I received the ever so common error of: When I went to the newly designed disk utility, it ...
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0answers
72 views

How to create (the missing) El Captain recovery partition? [duplicate]

I upgraded from Snow Leopard to El Captain. Before upgrade I had a bootcamp partition, and a third FAT32 partition. this caused some complications in the upgrade process and I had to delete the El ...
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1answer
1k views

Can't partition SSD

Hello I tried to install Windows 10 on my Mid 2012 13' MacBook pro with a Samsung SSD 850 EVO 500GB installed. In Boot Camp it won't partition my SSD. I also tried it in disk utility but it doesn't ...
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0answers
14 views

can I recover merged HFS+ partition with TestDisk

I have merged three HFS+ partitions into one using diskutil. The partition in the middle has some very important files. Using Stellar Phoenix Recovery's recover lost partitions option, I could see ...
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0answers
18 views

does os x store logs with offset of the drive during mount?

I have messed up my partitions, I would like to know the offset of a partition before I messed it up. Does OS X log it somewhere for me to find out? Thanks
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2answers
129 views

I deleted my OSX partition, and have no patitions formatted to bootcamp, so I can only access BIOS

I recently created a windows 7 partition on my mid-2009 mac-book pro. It then corrupted, so I was forced to delete the partition and attempt to reinstall windows 7, but in the process I also deleted ...
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0answers
60 views

Bootcamp no longer able to boot to OS X

I have a Macbook Pro 2014 with a Boot Camp partition for Windows 10. I decided to create a partition for data. I created and re-sized the partition in Disk Utility (OS X) but formatted it using a ...
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0answers
3k views

Windows 10 partition no longer boots after El Capitan upgrade

I have a triple boot MacBook Pro (mid-2014 model) with separate partitions for Mac OS X, Ubuntu Linux, and Windows 10 (recently upgraded, without any issues, from Windows 8.1). Before, everything ...
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1answer
86 views

USB Hard Drive HFS+ Encrypted Partition Formatted / Recovery

I have a WD 1TB USB External Hard Drive that was accidentally formatted. I had formatted the disk and started writing an ISO to the disk (less than 5 seconds), when I realized it was to the wrong one. ...
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1answer
893 views

How to make Macintosh HD size the same as SSD

So today, I tried dual-booting my late 2013 rMBP on El Capitan with Windows 10. I got to the step within Bootcamp where it was partitioning my SSD, and I went ahead and played a game of Super Smash. ...
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2answers
853 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?
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4answers
11k 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 ...
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0answers
23 views

Can't find storage after fixing EFI system partition error

I followed How to fix the error: "This disk doesn’t contain an EFI system partition"? In the final step sudo dd if=/dev/disk1s1 of=/dev/disk0s1 I cloned an existing ESP from an internal ...
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0answers
92 views

Disk utility reports wrong partition size

I am running El Capitan and recently deleted a bootcamp partition. However, I have noticed that Disk Utility is giving me erroneous values when it comes to partition size. When I click on the HDD, it ...
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2answers
898 views

Upgrading OSX on a three partition hard without losing bootcamp

I have a three-partition hard drive on my MacBook pro mid 2009: 1) Snow leopard (10.6.8) on Macintosh HD with 175GB free, 2) DATA on a FAT32 partition, and 3) Windows 7 on a Bootcamp partition with ...
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1answer
2k views

OS X can't unmount disk

My 1TB LaCie Rugged THB decided it was a good idea to stop working all of a sudden. If I open it in disk util I sometimes see an actual name of a partition, but most likely it's not the real name. In ...
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0answers
27 views

I am having problem creating a partition in unallocated space

I have 500 GB of total storage and its only available 38 GB.. What can I do? I want to create a new partition but I don't know how.. I am really new to OS X and I need help.. Sorry for my english. I ...
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0answers
110 views

Boot Camp partition won't show

I had Windows 10 installed on Boot Camp and updated Mac from Yosemite to El Capitan. Afterwards, I could no longer boot to Windows... I want a way to get to Windows or at least get to data on the ...
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5answers
22k views

Paragon NTFS for Mac 14 doesn't see NTFS disk (OS X 10.11 El Capitan)

I upgraded my Yosemite to El Capitan few days ago. Also recently Paragon sent me an e-mail with an offer of free upgrade from version 12 to 14. Since I bought ver. 12, I decided to install version 14. ...
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1answer
1k views

Deleted all partitions on Fusion Drive. Don't know how to recover

I'm kind of a novice here, and I think I got in over my head. I was trying to do a clean install of El Capitan on my 5K iMac. It has a 1TB Fusion drive. I booted from a USB drive, entered Disk ...
2
votes
1answer
1k views

Creating a partition in unallocated space

I left some unallocated space on my external HD (around 200 GB) and now I would like to create a partition on it using gpt in terminal since the Disk Utility tool on El Capitan is not even showing the ...
2
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3answers
3k views

How can I resize a partition on OSX 10.10.5

I have a Mac with OS X 10.10.5 on a HD which had 4 partitions. Using Disk Utility I deleted one of the 4, intending to slightly grow the 3rd (containing the OS), leaving space for a new partition to ...
2
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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 ...
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0answers
119 views

Can't get Windows to boot after editing partitions

When I attempt to boot Windows I get the error 0xc000000e. This happened after I made a partition in Windows and then deleted it in Mac OS. Here's my current set up. Is it possible to repair it using ...
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0answers
37 views

After installing Windows 8.1 I was asked to install Boot Camp

I have Mac Book Pro Retina with OS X Yosemite and Windows 8 partition with size of 50 GB. lately, I had installed Avast security software and this made a crash for Windows partition . I could see the ...
2
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0answers
758 views

Partition hard disk not working on El Capitan

Here's my situation: I currently have a Macbook running OS X El Capitan. Prior to my upgrade to El Capitan, while running Yosemite, I had two partitions of my hard drive: one for my base Yosemite ...
0
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1answer
178 views

Recovery partition in the middle of the file system

I have a problem with my recovery partition. Before update to the el-capitan I had both osx and windows on the same ssd disc created with Boot Camp. The problem is that something went wrong during the ...
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0answers
260 views

Missing SSD space on MBPr 13, El Capitan

I have the following problem: I had two partitions, one was ~190 GB, and another ~60GB. Then I wanted to delete the second partition and resize the first one. The deletion went well (I suppose), but I ...
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0answers
442 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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1answer
770 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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0answers
155 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
1k 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
587 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 ...
0
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1answer
130 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 ...
0
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1answer
116 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
63 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 ...