Questions tagged [partition]

Creating a new disk formatting scheme or altering an existing scheme

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3answers
4k views

New SSD can't be initialized

I have an old Macbook Pro for which I bought a new SSD and replaced the HDD with the SSD. Can't go further, see below. I really don't know what to do. I could return the SSD which, finally, might be ...
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1answer
379 views

Partition of harddisk lost/unusable

I'm using OS X Yosemite - version 10.10.2. I have 1.12 TB fusion drive on my system. Recently I wanted to make a partition on my system, while making the partition on the system using disk utility ...
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1answer
707 views

Do I have an SSD and a hard drive on my MacBook Pro?

I looked at the details provided in my system report/storage and I noticed that it appears I have a hard drive of 499.05GB and an additional SSD drive of 499.42GB. Does this mean I have 1TB of data? ...
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1answer
391 views

Failed paritiong resizing partition in Mojave via Disk Utility (Planning to add it to Bootcamp) [duplicate]

(Using Mojave 10.14.1 on MBP Mid-2012) I was trying to resize my AFPS partition to add it later to my Bootcamp partition (in Windows) but the operation failed. What I did was to use Disk Utility's ...
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1answer
2k views

Missing Space on Drive using Core Storage after Boot Camp Assistant Failure

Using Boot Camp Assistant, I started to create a 50 GB partition, but it hung on partitioning. After waiting about 30 minutes without the progress bar moving, I quit the Boot Camp Assistant, thinking ...
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1answer
1k views

What is EFI in partition scheme?

Recently I changed my partition scheme from MBR to GPT, and during after conversion I saw a another partition named EFI ... I don't have a good idea what does it do or its purpose ... but I think it's ...
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2answers
6k views

Failed bootcamp partition, now can't remove it

Tried to set up Windows 10 on my Macbook Pro 15" (Mid 2014). Running El Capitan 10.11.3. Windows refused to install (GPT partition only problem?). I followed steps elsewhere to remove and reformat the ...
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2answers
2k views

Lost Windows Bootcamp boot entry after resizing the partition

I have a 2011 iMac that I had used Bootcamp utility to install Windows 7 on. I got overzealous and tried to triple boot Windows, Mac and Linux on the iMac. I no longer need Linux on this iMac but the ...
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1answer
6k 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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1answer
1k views

Yet another corrupted partition table on macOS Mojave

I've seen a couple of posts on here addressing similar issues. Since I don't have in-depth understanding of what went wrong I have to describe what happened in my case and hope you'll help me. Thanks. ...
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4answers
21k 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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4answers
74k views

Missing Yosemite Recovery Partition

After doing a standard, App Store upgrade of Yosemite it seems that the recovery partition is still Mavericks-specific. Whether I hold Cmd+R or Option and select the recovery partition it takes me to ...
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4answers
40k views

Remove “Windows” Entry from Mac Boot Loader

Background A while back, I installed Windows 8 on my MacBook Air (mid 2013 model) using Bootcamp. It never really worked, (it would freeze all the time, the WiFi would cut in and out, etc.) so I got ...
10
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6answers
70k views

How do I delete a BootCamp partition using Terminal's diskutil?

For some reason, the BootCamp Assistant app won't let me delete my BootCamp partition. How can I do so using Terminal and the diskutil terminal app?
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5answers
43k 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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3answers
34k views

Install 2 different OS X versions on the same machine/hdd

OK, here's my situation : I am a developer needing to debug under different OS X versions I currently own 2 macs : a MacBook Pro and an iMac the iMac has Snow Leopard (10.6) on it - it came pre-...
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1answer
70k views

Install windows (bootcamp) without CD or USB Flash Drive

I'm currently trying to install windows on my macbook (13in, 2011), but without any success. My CD drive is dead (as a matter of facts its ruining any cds I put in it), and I simply cant boot via USB. ...
2
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1answer
12k views

How to fix the error: “This disk doesn’t contain an EFI system partition”?

I get the following error and cannot start Bootcamp after accidentally deleting the EFI-partition of my main drive. This disk doesn’t contain an EFI system partition. If you want to start up your ...
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3answers
16k views

Disk Utility Cannot erase USB Drive (Error: -69877: Couldn't open device)

I have a PNY 128gb flash drive that I can no longer modify (can't delete files). I've tried to reformat it using Disk Utility but I get the following message and my usb is unmounted: I've followed ...
5
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2answers
43k views

Partition problem with APFS containers in macOS High Sierra

As always I'm so impatient and migrating with my main devices to the first developer previews the day they are available. Which as always bring me only problems but I just cannot help myself. So ...
5
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2answers
18k views

How to Install Windows 8.1 on Haswell Mac?

I have a Haswell retina MBP, but following the installation process with Bootcamp Assistant v.5.1.1 results in an error when Windows attempts to install. Are there any guides available that walks one ...
4
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1answer
45k 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 ...
4
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2answers
829 views

I have `/usr/bin/env` in my “Macintosh HD” but not in the recovery partition. Is this normal?

I'm working on a MacBook Air, that's currently booting to macOS High Sierra 10.13.6. It also has an Ubuntu 16.04 partition, that I am currently trying to reach. I was trying reinstall rEFInd, which ...
4
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1answer
16k views

Bootcamp: no bootable device – insert boot disk and press any key

I installed Windows 7 on my 2011 MacBook Pro (MacOS High Sierra) successfully. It was recognized at boot time by the computer and had no problems. Then I used Disk Utility to create some free space ...
3
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1answer
2k views

macOS + Windows 10 + shared data partition

How can I setup my Mac with three partitions, one with macOS, one with Windows 10, and one data partition that can be used by both macOS and Windows?
3
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3answers
3k views

Why does my 3TB Seagate HD keep formatting as a Logical Volume Group

This is really annoying. I have a brand new Seagate 3TB 7200 RPM hard drive that I am trying to format/partition in Disk Utility. Every time I change any settings or erase the drive, it changes it to ...
3
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3answers
6k views

Can one create a multi-partition USB Stick with Mavericks, Yosemite, Snow Leopard installers?

Does anyone have any experience creating a multi-partition USB Stick with bootable partitions for installing Mavericks, Yosemite and Snow Leopard? I have a 32Gb stick I'd be perfectly willing to ...
3
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1answer
15k 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 ...
3
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2answers
3k views

Deleted Windows Through DiskUtility, 100GB in “Free Space”, Unable to Combine to Main Partition

I deleted bootcamp with Disk Utility and now have lost 100GB of space that I can't recover. macbook-pro:~ kevin$ diskutil list /dev/disk0 (internal): #: TYPE NAME ...
2
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1answer
1k 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
2k views

Rename EFI Boot Partition “EFI Boot”

I am trying to rename my Windows / Boot Camp partition from "EFI Boot" to "Boot Camp" or "Windows". But I do not figure out where to rename. I tried bless command on the NTFS Volume, I tried ...
0
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1answer
665 views

How do I resize an ex-CoreStorage volume?

I've got a Macbook Pro Retina (with the PCIe drive ‘blade’, instead of a traditional 2.5" laptop drive). I've recently upgraded the internal drive from 500GB to 1TB, and dd'd the old drive over the ...
0
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1answer
6k 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 ...
0
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2answers
493 views

migrating partition to a 2015 MacBook Pro

I'm a developer and through the years with my MacBook Pro early 2011 I installed and configured a lot of stuff to help me in my job. I would like to buy a new MacBook pro but don't want to spend days/...
10
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1answer
4k views

Prohibitory sign on boot after Sierra update, can't mount disk anymore

A few days ago I decided to update to Sierra from El Capitan on both the disks on my MacBook Pro (mid 2012); the update on my SSD went without a hitch so I decided I'd update my other disk, too. I ...
8
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2answers
44k views

How do I pass the following error message in the Boot Camp Assistant: “Please format the USB drive as single FAT partition.”?

I am running the Boot Camp Assistant on El Capitan. Whenever I reach the third screen, titled "Save Windows Support Software", on which I can select an storage medium to save the Windows support ...
7
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3answers
2k views

Can the contents of a partition be recovered after partition table is overwritten?

I ran a command to make my external hdd bootable knowing that it was risky considering the command itself did not allow me to specify a partition to which to write. (In hindsight, I would now call ...
6
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2answers
5k views

Can't resize partition on VMWare Mac

I have a mac running in a virtual machine and I expanded the hard drive in the settings, however when I go to resize the partition in the guest OS, it does not let me. There is only one partition now, ...
5
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1answer
959 views

Boot Camp partition removal failed in macOS Sierra

I installed Windows 10 on my Mac using Boot Camp Assistant, but later decided to remove the partition as I no longer needed Windows. I did (or tried to) using Boot Camp "restore", but it gave me an ...
4
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1answer
7k views

Can I move Applications to another partition?

My Startup disk partition is just 20 GB and I'm running out of space. What's the safe way to transfer Applications folder to the other partition? Can I just move all apps into a folder on the other ...
4
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1answer
3k views

Corrupted macOS partition after GParted

I followed a tutorial to create dual boot with macOS Sierra 10.12 and Kali-Linux 2.0. I created a bootable USB drive and booted on a Kali-Linux live session in order to use GParted and resize my ...
4
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1answer
724 views

diskutil list shows 20 disk partitions, I only know 3, what are the rest?

Following the post FFFFFFFF problem with hybrid partitioned drive, not able to fix with the guide in other topics, diskutil list gives me the following big list of disk partitions, what are the /dev/...
4
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1answer
7k views

How to merge two partitions on external hard drive when the “partition” option is greyed out?

I have an external hard drive that is connected to my computer by a SATA/eSATA cable. Diskutility recognizes the hard drive as two separate drives as shown in the following two images: I can't seem ...
4
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5answers
51k views

How can I get an unreadable Flash Drive to work?

I got this pretty cool flash drive as a gift and I can't seem to use it. Every time I plug it in, a pop up comes up that says: The disk you inserted was not readable by this computer. I opened up ...
3
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1answer
4k 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 ...
3
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1answer
7k views

Cannot partition internal drive to install bootcamp because of APFS/High Sierra

When I run Boot Camp Assistant, the attempted installation of Windows 10 fails, giving me the error "An error occurred while partitioning the disk." Have already tried First Aid on both my macOS boot ...
3
votes
1answer
7k views

Unable to adjust partition of USB drive with Mountain Lion Disk Utility

I have a 500 GB USB drive, which I once partitioned into two parts: one encrypted—Mac OS Extended (Journaled, Encrypted), and the other not—Mac OS Extended (Journaled). Now I want to change the ...
3
votes
1answer
2k views

VMware Fusion virtual machine from a local partition

When you have a Windows partition on your system, VMware can see and boot a virtual machine from partition. However, with other OS X and Linux partition, there's no such option. Is there a way to ...
2
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1answer
10k views

MacPro Hard Drive 3 TB or Larger formatted to Logical Volume Group by Disk Utility

I have an Intel MacPro in which I recently installed a new internal 3TB hard disk. I attempted to format it in Disk Utility using the standard GUID partition map and encountered a strange problem. ...
2
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1answer
4k 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 ...