Questions tagged [partition]

Creating a new disk formatting scheme or altering an existing scheme

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3
votes
2answers
7k views

OS X Partition not resizable

3 weeks ago I installed Yosemite public beta onto a brand new Macbook Air which arrived with Mavericks pre-installed. To carry out the installation I created a new partition for Yosemite and so had ...
3
votes
2answers
691 views

Can't see external HDD partition in Disk Utility

I have a TB external HDD divided in 2 partition: First partition: 280 GB Second partition: 1720 GB Initially, both partitions were NTFS. Then, I formatted the first partition to macOS Extended FS, ...
3
votes
2answers
492 views

Problem cloning the startup disk of a MacBook Pro running OS X 10.11.6 El Capitan

Before putting my question in detail, see Problem section below, I'd like to sketch the context in which it appears. Hardware-Software-Environment MacBook Pro Early 2015 running OS X 10.11.6 El ...
3
votes
1answer
2k views

Can a Time Machine drive have several partitions, or does Time Machine need the whole HDD to itself?

Is it possible to partition and external drive an use only one of the partitions for a Time Machine backup? Or does Time Machine need its dedicated hard drive? (I've never used Time Machine before.) ...
2
votes
1answer
488 views

Restore main APFS container to full disk

I tried installing Windows 10 on my Macbook Pro with Bootcamp on Mojave, but through a series of manipulations, I broke my Windows installation and Bootcamp would not let me restore my system as it ...
2
votes
2answers
491 views

Lost my APFS partition after using EaseUS partition manager on Bootcamp

I used macOS mojave(APFS partition) and Windows10(Bootcamp). And I tried to expand Bootcamp partition with moving Windows OEM partition by EaseUS partition master in windows. After this, I can’t find ...
2
votes
1answer
134 views

MacOS partition showing as “FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFF”

I tried to uninstall linux on my MBP 2014, accidentally corrupting my MacOS. Tried to fix it using this guide : Data Not Backed Up, Partition Type: FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF, did not work. ...
2
votes
1answer
164 views

Unusable 2.5" external HDD. Partition failed with the error -69760: Unable to write to the last block of the device. Exfat only? Repairable?

Update 1: Somehow, after unconnecting and re-connecting, the original disk (disk1) has now returned to original state, with the readme file as well! I still have another disk which is not working. ...
2
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1answer
4k views

how to expand bootcamp boot partition to previously existed NTFS data partition

Some time ago I've partitioned my disk using this scheme: shrinked OS X partition, created NTFS data partition for Windows, then installed Windows on Bootcamp partition. Recently I installed ...
1
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1answer
3k views

WD external drive won't mount in OSX - partition map rebuild?

I have a WD Mybook Studio 500gb that will not mount. I've tried every possible option in Disk Utility and it see the drive (unlike finder), but won't mount the partition. I also tried plugging it in ...
1
vote
1answer
448 views

Extand main APFS partition on MacOS Mojave 10.14.3

As it can be seen from the screenshot below my APPLE SSD is of size 500GBs, but my Apple_APFS Container disk1 is of size 450GBs. There was a Container disk 2 of size 50GBs before but I successfully ...
1
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1answer
810 views

Issues with Bootcamp trying to boot to a bootable device other than my HD

A week ago, I attempting to load Windows (with Boot Camp) on my Mac Pro. The Windows 7 install CD I used had missing files, and thus I deleted the partition I created to house windows, not wanting to ...
1
vote
1answer
654 views

Bootcamp Error: The startup disk cannot be partitioned or restored to a single partition (not a duplicate)

I am running Mojave, trying to install the latest version of Windows 10. I had this error, so followed the instructions here: Bootcamp issue: The startup disk cannot be partitioned or restored to ...
1
vote
2answers
4k 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 ...
1
vote
1answer
390 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 ...
1
vote
1answer
953 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? ...
1
vote
3answers
5k 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 ...
1
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0answers
45 views

MacBook filesystem FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF after deleting linux partition [duplicate]

So I have MacBook Air late 2015. I’ve been using bootcamp for a while. Yesterday I installed rEFInd to use triple boot for Linux. Made partition for Linux. Later I decided to delete this partition ...
0
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0answers
30 views

How can I recover my external hard drive's free space? [duplicate]

I had these partitions on an external hard drive: /dev/disk2 (external, physical): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme ...
0
votes
1answer
881 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 ...
0
votes
1answer
2k 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. ...
0
votes
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 ...
0
votes
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 ...
0
votes
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 ...
0
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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 ...
59
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1answer
103k views

No partition scheme option when erasing a USB disk in MacOS High Sierra?

In previous versions of MacOS, I recall that Disk Utility provided an option to select the partition scheme (GUID, MBR, or Apple). If I formatted the USB key without changing the scheme to MBR, I ...
12
votes
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 ...
11
votes
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 ...
15
votes
5answers
48k 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 ...
12
votes
6answers
75k 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?
19
votes
5answers
57k 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 ...
17
votes
7answers
63k 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 this ...
15
votes
3answers
35k 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-...
4
votes
1answer
71k 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. ...
5
votes
1answer
22k 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 ...
5
votes
2answers
49k 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 ...
4
votes
1answer
17k 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
votes
1answer
13k 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 ...
5
votes
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
votes
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 ...
4
votes
2answers
957 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
votes
1answer
49k 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 ...
3
votes
2answers
4k 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 ...
3
votes
1answer
3k 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
votes
2answers
4k 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 ...
3
votes
3answers
7k 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
votes
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 ...
2
votes
4answers
25k 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 ...
2
votes
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 (...
1
vote
1answer
5k 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 ...