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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Internet Recovery doesn't see disk, but able to boot normally

I have a MacBook Pro (mid-2015) that I want to completely wipe. 2+ years ago, I installed my own 1TB SSD. Everything works completely fine, and always has; I can boot into the OS, it runs fast, plenty ...
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Bootcamp Assistant giving errors and so is Disk Utility. Mac isn't allowing me to install Windows like I have before!

I have scoured the internet for a solution to finally be able to use Bootcamp but nothing at all has worked. I previously used BCA to install Windows 10 on my computer but after about a year or so, my ...
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After converting SSD to APFS MacBook 2016 doesn't boot anymore

Good morning, My MacBook 2016 with TouchBar doesn't boot anymore when going from its original Sierra to newer operating systems, e.g. High Sierra or Big Sur. One morning the computer just refused to ...
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Reviving unmountable & unformattable usb drive

I have a USB drive, which was a bootable Windows drive, which I seldom used. Recently I tried to format it, and it went corrupted (I hope). I'd like to find out if it's broken or not. I'd tried to ...
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Erased Macintosh HD - Data. Now can't login

This all started because I was trying to clean install a Macbook Pro that someone sold me. They gave me the password to log into the computer under their profile so I could clean install it. I started ...
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Resizing “VM” APFS volume on osx

I'm trying to free up space but 150gb is taken by "other volumes". diskutil list shows that "VM" volume is taking 150gb. How can I resize it to be smaller? $ diskutil list /dev/...
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Cannot boot into macOS

A while ago, I installed Ubuntu along with the macOS on my MacBook. Yesterday, I decided I should uninstall Ubuntu. I read a post on how to uninstall Ubuntu. What I did was, in Disk Utility on macOS I ...
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Why doesn't my sparsebundle report free space, with plenty to spare?

I have a Time Machine created sparsebundle (HFS+) that reports the following limits when using hdiutil resize -limits: min cur max 403186088 403186088 34359738368 That's a current size ...
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How can you verify when a drive was last formatted?

I'm trying to determine the date a drive on a MacBook was last formatted. I used to be able check the inode birth time of the root volume, but it appears a recent MacOS update may have changed this ...
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Trouble accessing old Apple_HFS DVD

I'm trying to read an old DVD that was burned in 1998. I've tried mounting it through apple's own Disk utility app but it has shown (com.apple.DiskManagement.disenter errore 49153). Diskutil list says ...
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macOS Utilities doesn't recognize internal ssd (but normal usage is working fine)

I own an early-2015 Macbook Pro and by trying to format it for reselling purposes I've got faced with a curious and annoying problem. macOS utilities does not recognize my internal ssd. Be it by ...
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Problem with disk repair

I have HDD connected to my Mac which is formatted with HFS and I use for backups. I have noticed a problem while running fdisk and fsck_hfs: sudo fsck_hfs -rd /dev/disk1s1 Password: journal_replay(/...
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Internal SATA drive unmounts by itself

I have a 1TB SSD that was my boot drive in my now-dead MacBook Pro, and I need to recover some files from it and clone it. The idea is to have an exact copy on another HDD that I can clone back to ...
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Cannot boot macOS after installing Ubuntu on dual-boot Boot Camp Windows

While installing Ubuntu on my MacBook Pro 2015, which already has Windows and macOS installed, I made a huge mistake by selecting the "install alongside Windows" option. As a result, I can ...
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Macbook pro 2017 Internal SSD not recognized

I wanted to upgrade my internal SSD from my Macbook Pro 2017 256GB to a 1TB SSD I found online. I bought it from Aliexpress and seemed genuine. The fact is that my computer does not recognize it IN ...
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Catalina - Grant FDA (Full Disk Access) without GUI session

I am using aws ec2 mac instances so I don't have access to GUI Is there a way to grant a binary FDA using command line only?
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How to properly unmount image (dmg / sparsebundle)

[macOS Mojave 10.14.6] I've recently discovered r/w disk images and the particularly fascinating sparse bundle. As I understand it, an image (the .dmg or .sparsebundle itself) is "attached" ...
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Drive boots but isn't “located”

The APFS drive I'm writing this text from cannot be located by macOS High Sierra. Everything that needs it misses whatever link is necessary to get to it. I can boot, I can use it, I cannot "find&...
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Cannot recover space after deleting Windows partition in bootcamp

First I used Disk Utility to create a 100GB partition for sharing data between OSes, I then used Bootcamp Assistant to create a Windows partition to install Windows. Later, when I removed the Windows ...
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52 views

Missing 300GB harddisk, how to recover it?

I had a bootcamp partion which I removed, how can I recover the 300 GB disk space it used? diskutil list /dev/disk0 (internal, physical): #: TYPE NAME SIZE ...
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Under a standard user account, after Big Sur update, why does Disk Utility continuously ask for admin authentication?

I'm running MacOS Big Sur (11.2.1) on a MacBook Air 2014. I exclusively use the MacBook under a standard user account, though I also possess the admin credentials. Since a recent update (I want to ...
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I have an external 1TB Seagate Harddrive but it shows that only 268MB is available. Why?

I tried to erase it with Disk Utility but unsuccessful. It still shows that only 268MB is available, while another utility program (balenaEtcher) used for writing image files, shows 1TB free space. ...
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Fixing damaged partition map. Couldn’t modify partition map. (-69874)

I am trying to fix my external hard disk but when I use first aid from disk utility, it throws an error: My Mac was able to read this hard disk till yesterday before I tried to force mount it using ...
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1answer
41 views

USB drive (Fat32) stuck on read-only. Unable to erase or partition

I bought a SanDisk USB drive about a month ago. It's currently formatted as MS-DOS (Fat32), and it's stuck on read-only and I'm not sure how to fix it. (and there is no physical switch on the usb) In ...
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105 views

How To Change Time Machine Password - Mac OS Extended (Journaled, Encrypted)

How may a Solid-state drive (SSD) Time Machine backup password be changed for a SSD formatted as "Mac OS Extended (Journaled, Encrypted)"? Expected This is how a Time Machine backup password ...
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Which encryption algorithm do external hard drives use?

if external data carriers are encrypted via the Finder, which encryption do you use?
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I erased Macintosh HD in disk utility, now I can't reinstall macOS Big Sur

So I wanted to reset my 2019 Macbook Pro, so I used CMD + R and went to disk utility and erased Macintosh HD... I then went to reinstall MacOS Big Sur and I got about halfway through the ...
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1answer
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Error: -69519 when resizing partition of apfs container scheme

I am trying to resize the partition disk0s2 in my Mac. My diskutil list shows: /dev/disk0 (internal, physical): #: TYPE NAME SIZE IDENTIFIER 0: ...
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Missing Macintosh drive after running recovery mode

I’m hoping someone can help me. I’ve had to run a recovery mode on my Mac air and when I tried to reinstall the OSX it cannot find the Macintosh HD. I’ve tried to repair the disk0s2 with no success. ...
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Delete files from SD

I was using an SD card with GoPro. On device format didn't work one day, so I tried erasing it in Disk Utils on my Mac (Big Sur 11.2.2). It appears to be blank, but when I re-mount it again - all ...
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How do I reset the snapshots of an APFS external drive?

In the past couple weeks, my time machine is complaining that it's not managed to complete a backup. It turns out it aren't able to create a snapshot in one of my external drives. Error message is ...
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Catalina partition turns into type FFFFFFF/unbootable and unmountable “disk0s2” after Mavericks install

I'm having a similar issue with this (MacOS partition formatted FFFFFFF etc after bootcamp install), but I got confused while reading the comments. I thought it would be a great idea to dualboot ...
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Disk Utility changing partition types on its own

Whenever I do an operation in Disk Utility the last day it seems that I end up with my APFS partitions set to an unknown partition type (FFFF...) This has happened three times now both after extending ...
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1answer
44 views

burning a multi-session cd into iso

I have a multi-session (osx/windows) cd that I'd like to create an iso from. Is there a way to create a single iso file with all the sessions included in it? Output from diskutil list disk2 is below. ...
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24 views

bootcamp partition issues

I'm using a MacBookPro11,3 with MacOS Big Sur 11.2.1 I get an error message while trying to partition with bootcamp. It suggested me to run first aid but no problems were found. ”Your disk could not ...
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1answer
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Can Big Sur disable external drives?

Been having several seemingly unrelated problems with a new (2019) MacBook Pro (MBP).  All of them seem more like software than hardware (as a retired software engineer with ten years as an ...
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Problems Reformatting SSD on mid 2015 Retina 15" MBP

When I purchased the subject laptop last year I replaced the original Apple SSD with a non-Apple 2 TB SSD. For years I have always kept OS and data on separate drives or at least separate partitions. ...
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Seagate External Drive Won't Mount

I am very much a newbie here, but saw something on StackExchange that someone here might be able to help me with. I have a Seagate 2TB portable that I use as a backup drive for my 2017 Macbook. It was ...
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Restore a NTFS volume back up by Disk Utility

I have a Windows installation which I created with Bootcamp. Then I need to expand the volume to add more Software. So I use Disk Utility to create a DMG image for the Bootcamp volume. But after I ...
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How to open an external hard drive when its detected by Disk Utility but not in Finder?

I have a microSD card that is working on my dashcam. But not mac. (latest Big Sur) It's seeable in the Disk Utility but not in Finder. What should I do? Update: aab-MacBook-Pro-2:~ myname$ diskutil ...
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How to check or repair file system on network volume?

I've an application (Arq7 from arqbackup.com) reporting some file system errors… 19-Feb-2021 22:04:43 EST Error: /Volumes/Europa/Photography/µ being deleted/2011 _General.photoslibrary/resources/...
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Help! Missing Components on a Basic MacOS Lion Reinstallation! Missing StartUp Disk!

I am trying to salvage an old, discarded white macbook 2010 running OS Lion. I went through the usual steps to restart in recovery mode, open disk utility, erase the old files, etc., then quit disk ...
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How to remove a Volume using Terminal?

A few weeks ago I mounted an external hard drive with a volume named "CJ 1TB" I ejected it and thought everything was fine, but my system (11.2.1) has not forgotten about it. When I run &...
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Renamed external drive still appearing in terminal with both old and new names

I have an external drive connected to my MacBook Air via USB 3.1 Gen 2 through a TB3 hub. A few weeks ago I changed name of the drive from Mercury 1TB to just Mercury. This was done in the Finder. I ...
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1answer
143 views

Two different Containers after factory reset? Macintosh HD & Macintosh HD Data?

I wanted to start from scratch so I followed the guide that Apple has on their site. After rebooting and logging back in I saw that I have two different containers. Macintosh HD and Macintosh HD Data. ...
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1answer
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GUID_partition_scheme not fully used after SSD clone

I cloned a 750Gb HDD to a 1Tb SSD. I can only access 750Gb on the SSD so 250Gb are wasted. How can I include (assimlate?) the remaining 250Gb so they're not wasted, or create an accessible partition (...
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Reinstalling Mac OSX Lion on Locked Disk

I have a 2011 vintage MacBook Pro which is not booting at all. It gets to the gray screen with Apple logo and does not move ahead from there. I pressed Command-R at bootup to enter the disk utility ...
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1answer
69 views

Kali Linux bootable USB not showing up in boot menu

I am using a 2018 MBA running Big Sur I wanted to create a persistent bootable USB with Kali Linux and have followed the exact instructions as given in this article: https://medium.com/macoclock/...
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4answers
203 views

Safe to delete old “Macintosh HD - Data” partition?

I did a clean install of MacOs today, and when choosing where to install it chose "Macintosh HD". It now seems there is a new "Macintosh HD - Data" partition, where MacOS currently ...
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NTFS-3G auto-mount arguments and disk utility

I setup NTFS-3G on MacOS Big Sur 11.2 and replaced the default ntfs_mount with NTFS-3G. However, I noticed a problem. Every time I plug in a NTFS I don't see any files show up in finder (but they do ...

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