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Questions tagged [disk-utility]

Apple's built-in disk management utility for the mac. Erases, formats, and restores volumes and drives.

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Why does my exFAT external disk show errors on Windows and corrupt PDF files after formatting on macOS?

I partitioned an external disk as exFAT on my Mac using diskutil and the following commands: diskutil list diskutil unmountDisk force disk2 sudo dd if=/dev/zero of=/dev/disk2 bs=1024 count=1024 ...
cconsta1's user avatar
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2 votes
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My physical disk has unaccessible free space

I tried double booting Asahi Linux to mess around with it, but regretted the partition size I choose. So, I tried changing it, but when I deleted the Volumes the free space left over does not show up ...
Dylen Liverman's user avatar
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Snapshots are too big and constantly fills my SSD!

I keep getting out of space warnings, and the only way to reclaim that is using Daisy Disk. Disk Utility always shows "resource busy". Some thoughts: perhaps it's possible to decrease the &...
Henry Mazza's user avatar
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Which files are inside of a bootable macOS USB created with macOS Terminal? [duplicate]

I need a list or a screenshot of them to replicate them because the bootable created in Windows Transmac just has a PKG file therefore not recognized as a bootable device. I tried creating a blank ...
Electronic_Thanks_55's user avatar
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Not able to access 500 GB space from my external drive

I have a 1.5 TB WD Elements hard drive. There were two containers with 500 GB space and 250 GB space respectively. I wanted to delete both of them and merge them in my 750 GB APFS volume. I was able ...
pujanm's user avatar
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Macbook Air 2013 - 256GB SSD shows as 1.2GB in disk utility

I have "inherited" a 2013 MacBook Air with a 256GB SSD. The machine was formerly used with Windows 10 but I threw that out, along with the MacOS, and tried to install various versions of ...
Axel Lieber's user avatar
1 vote
0 answers
49 views

Diskutil partitionDisk Error: A writable disk is required (-69772)

I'm trying to format an external disk (identified as /dev/disk4) using diskutil partitionDisk on macOS. However, I'm encountering the following error: Error creating partition map: A writable disk is ...
scd's user avatar
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Unable to erase brand new SSD with APFS [duplicate]

I've been unable to set up a new SSD for a friend. The plan is to use it for the internal drive on their Mac. Using Disk Utility: Erase -> Format:APFS Scheme:GUID Partition Map Two drives have ...
Matt Canty's user avatar
1 vote
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macOS Sonoma usb drive stuck on DiskMountApproval in diskutil

I have a USB drive which is not showing up on finder or disk utility (in fact disk utility stuck on loading when inserted) running diskutil activity shows this log: ***DiskPeek ('disk4s1') Time=...
bcsta's user avatar
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can't eject/delete/unmount "phantom" disk images in Recovery Mode Disk Utility

I tried making a bootable macOS Sierra DVD and now I'm stuck with 2 disk images whenever I boot into Recovery Mode. The DVD is no longer inside the optical unit obviously. Ejecting doesn't work. ...
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MacOS Recovery Mode Risk

(A related question was previously posted in the Asahi Linux forum, I didn't get an answer there; see https://discussion.fedoraproject.org/t/question-and-worries-about-wipe-linux-in-recovery-mode/...
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27" iMac 5k VDH002, won't mount other disks

2015 27" iMac 5k with SDD. Diagnostic says "VDH002 issue with storage device" and it won't boot from the internal drive any more. Recovery can't mount any other disks to reinstall. ...
apfrod's user avatar
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1 vote
2 answers
134 views

Unable to shrink MacOS partition - Sonoma 14.4.1 (23E224)

I am unable to shrink my macOS volume/disk on my Intel 2019 15" MBP with a 1Tb disk to make space (128gb) for installing a linux distro in dual boot configuration. Disk utility in macOS will not ...
Mark Smith's user avatar
1 vote
1 answer
157 views

Need assistance installing Windows 10 64bit on a late 2009 IMac 27in with a non functional optical drive

So far I have attempted the answer/instruction to this question. I also attempted to UEFI boot install windows 10 from start up manager by creating a ExFAT Flash Drive with the contents of a mounted ...
Chap's user avatar
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2 votes
1 answer
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Following instructions to manually install Windows by manually creating Bootcamp partition during start up it doesn’t show up

I’m in the process of putting windows 7 on my late 2009 iMac. I’ve been working on this for a few days now. I couldn’t just use the normal Bootcamp assistant because of hardware issues and ended up ...
Chap's user avatar
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How can I delete the partition and merge it into one?

diskutil list /dev/disk0 (internal, physical): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *121.3 GB disk0 ...
Subhadeep Mondal's user avatar
2 votes
1 answer
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Macbook Pro 2013 - Unable to boot after attempting to remove Kali Linux partition

After attempting to remove a Kali Linux partition through Disk Utility on macOS High Sierra, I ended up with a drive that had a type of just FFFFFFF-FFFFF. I proceeded to try to fix that through using ...
Rubenith's user avatar
1 vote
1 answer
65 views

Sharing space across encrypted/non-encrypted AFPS volumes

According to Apple's support documentation, Apple File System (APFS) allocates disk space on demand. When a single APFS container (partition) has multiple volumes, the container’s free space is ...
John D.'s user avatar
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Unable to detect USB flash drive after ejecting in middle of operation; is there any way to make it working again?

I have USB 3.0 flash drive (64 GB) and it was very much detectable in Mac (macOS 14.4.1) but recently while making it bootable USB flash drive using winDiskWriter app, I have ejected in middle of ...
xkeshav's user avatar
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Overallocation warning in First Aid in Recovery Mode for mid 2015 Macbook Pro on High Sierra

I have a 15” Intel Macbook Pro(mid 2015) on High Sierra. No operation issues with laptop, but one day I ran First Aid and got the error that a volume in Macintosh HD could not be unmounted so the ...
Kansuke's user avatar
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Freespace after a bootcamp that i can't get back(mac)

I have encountered with a problem after corrupted bootcamp Windows deinstallation. In diskutil list i have a free space and in GUI version of Diskutil when i'm trying to partition it - I keep getting ...
jshus's user avatar
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0 answers
26 views

Question Mark on 2015 Macbook Pro -- any hope saving data (and MBP)? [duplicate]

My 2015 Macbook Pro 13'' (OS X 10.11.6) is refusing to turn on and keeps showing me a flashing question mark 😭. I've followed the Apple Support instructions here, but was unable to fix the problem. I ...
adieu_kitty's user avatar
1 vote
0 answers
540 views

How to safely cancel Disk Utility 'seven-pass secure erase'?

I want to dispose of an external hard drive, and before I do, I want to ensure its contents is deleted. I naturally opted for the most secure deletion method, which involves writing over the disk with ...
stevec's user avatar
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1 vote
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Acquire an image of the hard disk from the outside

I need to take a dd image of a MacBook (Model A2179) 's hard disk. I have no way to recover the password to access the system and I want to acquire an image of the main hard disk for forensic purposes....
Kodeeo's user avatar
  • 121
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1 answer
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Recover unidentified free space after erase

I am having problem dealing with this situation: after I deleted a system that I don't want via eraseVolume, I don't have the access to this 119.4 GB space below. I have no idea how to recover it, ...
Ziyi Wang's user avatar
0 votes
1 answer
56 views

Trouble upgrading SSD on 2015 13" MBP

I have a friend who is trying to squeeze a bit of extra life from his aging 2015 13" retina MBP by replacing the factory SSD, which recently bit the dust (flashing folder.) At my direction, he ...
Harrison Wilson's user avatar
2 votes
1 answer
272 views

Creating a disk image from folder vs. Creating a blank disk image

I need to hide a particular folder on my Mac from other people who might want to view or copy them while I'm away from home. There are two ways I'm aware of. The first way is to hide the folder using ...
user avatar
0 votes
2 answers
42 views

Can formatting with an Android device fix error -69877 (Couldn't open device) generated by Disk Utility while trying to erase USB Drive

I am about to reformat a PNY 128gb microSD card that I have been unsuccessfully trying to erase by using Disk Utility (Monterey OS), but this time I will be using an older Android device. The card ...
powervisuals's user avatar
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Possible to access and backup a corrupted USB HDD via terminal?

TL;DR Is there any way to skip any checks on a corrupted USB disk, "raw mount" the device and create a raw image using macOS terminal tools? Details: An old Windows notebook of a friend ...
Andrei Herford's user avatar
5 votes
3 answers
975 views

Apple iOS 17.2 Simulator keeps appearing in Disk Utility. Doesn't go away

I am running MacOS Sonoma 14.2.1. Whenever I boot or reboot, a strange disk image keeps showing up in disk utility. If I eject it, they go away until I reboot. After every reboot, they reappear. The ...
DanRan's user avatar
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0 answers
37 views

APFS volume not utilizing full container space

So a bit of background: I originally had a couple partitions on my macOS hard drive that I recently removed. I've done this before so pretty simple. I then try to run diskutil apfs resizeContainer ...
Harrison G's user avatar
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1 answer
56 views

Suddenly can't boot

I was using my 13 inch Macbook Pro (mid 2012) as normal when it suddenly became really slow and it became so unresponsive I just forced it to shutdown by holding down the power button. After that I ...
onni82's user avatar
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1 vote
0 answers
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Encrypted disk image with a (n accepted) password, now disk utility refuses to decrypt said image with error "Passphrase too long", how to resolve?

On MacOS, using its disk utility, I created an encrypted volume from a folder using the following option listed under File -> New Image -> Image from Folder...: Since I always use pass as my ...
mkdior's user avatar
  • 11
1 vote
1 answer
58 views

How to move free space in front of APFS container?

How does one go about changing the starting position of an APFS partition on a drive? In this situation, I would like the 209.4 GB of free space to end up behind the APFS partition so that I can ...
Windooows's user avatar
0 votes
0 answers
56 views

Having trouble setting up used iMac, Mac OS X Start Disk won't eject

I just got an iMac from a friend and tried starting it up on the Mac OS X Start Disk. But following the instruction to install Snow Leopard, I can't install it onto Macintosh HD (which is the only ...
Mathsci225's user avatar
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0 answers
23 views

Deleted the partition on a MacBook using the Terminal but now unable to create new partition

I deleted the partition container by using the Terminal. Now I'm unable to create a partition. Photo of a System Recovery Terminal window showing the output of 'diskutil list': How can I delete all ...
Nadeem Ahmad's user avatar
0 votes
0 answers
184 views

Multiple Errors with Encrypted Backup Disk on Mac: -69845, -69808, and -69502

I'm dealing with several issues on an encrypted backup disk on my Mac, and I'm seeking advice. The disk has two partitions, and I've encountered different errors for each section and the container. ...
skywinder's user avatar
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1 vote
1 answer
64 views

The SSD not showing up correctly in diskutil in recovery

I’ve deleted my Macintosh HD partition and don't know what to do, because the free space isn't showing up in the graphic interface of diskutil.
namra's user avatar
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1 vote
0 answers
104 views

I erased my macOS Ventura using disk utilities and now I’m having trouble reinstalling macOS

I recently erased my Mac mini 2021 M1 chip computer using disk utilities. Now I am trying to reinstall Mac, but no matter how long I wait, the reinstallation process does not finish. I looked at the ...
displayname9818's user avatar
1 vote
1 answer
142 views

Failing to resize partition with diskutil

I wish to resize my main macOS (High Sierra, HFS+) partition to use free space on the disk. I use console in Recovery Mode, as I suspect I won't be able the change the disk in use in standard mode. I ...
Maguy IB's user avatar
0 votes
0 answers
276 views

Big Sur - How can I increase Bootcamp's partition size? [duplicate]

I installed Boot Camp last month on my Mac (Big Sur/macOS 11.7.10) so I could run Windows 10. I created a partition of a modest size, assuming that it would be adequate. I've since realized that that ...
EJ Mak's user avatar
  • 779
0 votes
1 answer
231 views

hdiutil: create failed - Operation timed out

I am trying to create a Backup.dmg disk image in a folder on an SMB file system. Using Disk Utility Using hdiutil hdiutil create -size 4t -fs APFS -volname backup Backup.dmg Both operations start, ...
Eric Kolotyluk's user avatar
1 vote
1 answer
290 views

How do I remove Ubuntu from my MacBook?

My MacBook has three OSs at the same time: macOS, Boot Camp Windows 10, and Ubuntu. It will display Windows, Macintosh HD, and EFI Boot (going to Ubuntu) when pressing the option when booting. I split ...
whaleboss's user avatar
0 votes
2 answers
157 views

Unable to partition apfs on internal ssd. macOS high sierra

My internal SATA SSD is formatted as APFS and I am running High Sierra on it. I want to use open core patcher to install Big Sur on a separate APFS partition (I heard there were problems when having ...
Luke M's user avatar
  • 11
0 votes
2 answers
361 views

"Untitled" can't be opened because the original item can't be found

Currently, my external SSD can be mounted and showed in finder sidebar. But, I can't open my disk and "Get Info" option is missing, then this error came. Here's my disk info. I tried: ...
CuriousPenguin's user avatar
0 votes
0 answers
45 views

I can't partition my hard disk in disk utility

After I deleted Windows from my Intel iMac (OS X 10.6.8) using The Boot Camp Assistant, I tried to install Windows 7 again, but when I reach the part of partitioning, the iMac got stuck and stopped ...
Yassine Lounadi's user avatar
2 votes
1 answer
68 views

macOS booting into Windows Recovery mode after deleting Bootcamp Windows partition

My Mac still boots into Windows recovery mode, automatically. I can still boot into macOS and everything works, however I want to remove this partition. When I first start my Mac it also shows up with ...
Apfel Tasche's user avatar
0 votes
0 answers
342 views

Mac M1 Sonoma: Cannot read my 256Gb Micro SD card

I have a brand new 256Gb SanDisk Micro SD card and I'm not being able to read/use in my Mac through the internal SD Card reader slot (I don't have an external card reader to try this option). The card ...
Krueger31's user avatar
0 votes
0 answers
161 views

I can't update to Mac OS 10.13 and later. You may not install to this volume because the computer is missing a firmware partition

I have a 2015 MacBook Air 13 running macOS Sierra. I got it without a working internal SSD. Now it only runs on an external SSD via USB cable. I would like to upgrade to High Sierra, but an error ...
Winda_Hyr's user avatar
3 votes
1 answer
192 views

Unable to remove bootcamp partion

I was previously using windows on my Macbook pro 2015, on mac OSX 12.6, but now no longer need it. I'd like to remove the partition and revert my laptop to how it was previously when it had more ...
Gabe Yawitch's user avatar

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