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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MacOS mounts OS X Base System (Catalina) from my Time Machine backup drive by itself
While my iMac (Retina 5k, 27-inch, Late 2015) was in sleep mode last night it mounted the OS X Base System (Catalina) and opened the image folder. Lately my Time Machine backup drive (Seagate Backup+ ...
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28 views
Ghost external drive in disk utility
I noticed recently when I open up disk utility and I see my external hard drive show up even though nothing is connected to my Mac. I can't unmount it and it does not do anything. Just wondering, is ...
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One Partition on External Hardrive not mounting, FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF?
After backing up to the partition, ejected as normal on remount one partition fails to mount. Doesn't show the volume in Disk Utility sidebar.
A quick look in terminal and the volume is there listed ...
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11 views
Correct procedure to grow an iSCSI partition from an expanded LUN
I'm using the Daemon Tools iSCSI initiator. I have created a practice iSCSI target and LUN on my QNAP. At first, it was 7GB. I took the LUN offline and increased the size to 16GB. I reconnected to ...
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31 views
Disk mount error: 49244; repair exits with code 8
I have a fairly new LaCie d2 4TB hard drive (roughly one year old). Some days ago it wouldn't show up anymore and now I looked into the issue.
In disk utility the disk is unmounted. When hitting "...
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1answer
25 views
Completely clean reset of Mac—does Internet Recovery reset Recovery partition
I want to completely reset my Mac by wiping the entire SSD.
I plan to start up from Internet recovery and then use Disk Utility's Erase option to erase APPLE SSD AP0512M Media (my computer has a 512 ...
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19 views
What is APFS “Disk User” and how to add multiple crypto users via diskutil?
I recently learned that it is possible to encrypt an APFS volume within a container from the CLI using the diskutil command like so:
diskutil apfs encrypt -user disk disk3s1
where disk3s1 is the only ...
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23 views
Assign disk space from one partition to a non-consecutive partition on the same disk
My external hard drive ExtDisk is set up as follows (output from diskutil list):
/dev/disk2 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: ...
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45 views
iMac main partition disappeared after deleting a different partition
So, I created a 20GB partition in my iMac to install Ubuntu. That worked fine, but then it turned out I needed a bit more space for the software I wanted to install, so I turned the computer off and ...
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1answer
42 views
MacBook on macOS Catalina 10.15.7 not returning disk space after deletion [duplicate]
So I believe I have a drive requiring FSCK or a version of this for Catalina. This started first of all when I was trying to get rid of purgeable space by creating lots of files using the dd if=blah ...
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2answers
34 views
Two 4TB hard drives — how can I create a RAID 1 with two 2TB partitions?
I have been struggling with trying to get Disk Utility to allow me to divide a 4TB HD into two 2TB partitions, and then have a mirrored raid of that for redundancy. Is this not possible?
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18 views
Free space shown on Windows 10 (BOOTCAMP partition) does not correspond to the free space shown on Disk Utility
I'm not quite sure how this works, but yesterday I used Boot Camp Assistant to get Windows on my Mac. Somehow the space available on the C drive is 10 GB whilst in the Disk Utility it shows 18 GB of ...
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16 views
Sandisk Ultra 3.0 128GB USB can't be detected on my Mac or Windows 10 after removing it
I bought a Sandisk Ultra 3.0 128GB USB for my Mac, a few years ago, so I could move files to windows if I wanted. All was well and working fine until I accidentally unplugged the USB from my Mac while ...
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1answer
32 views
How to clone startup disk?
In the process of upgrading to a new SSD in my iMac 2017 Catalina. After setting everything up using Disk Utility, it is asking if I want to restore from “iMacintosh HD” or “Macintosh HD - Data” I ...
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9 views
SSD Not Showing Up In Recovery Mode
I have a 2015 MPB I'm trying to reset to give to my stepdad.
Here's what I did:
Made a time machine backup
Started the MPB in recovery mode
Erased
the SSD and reformatted it as AFPS Journaled.
...
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1answer
25 views
Recover unallocated disk space
I would like to recover some unallocated (?) disk space on an external hard drive /dev/disk2 is 1TB but I only see a 250GB partition. Here is a terminal screenshot and a Disk Utility one.
Is there ...
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8 views
What could be taking up 100GB+ storage in Other or how to find what is? [duplicate]
What could be taking up 100GB+ of storage in "Other" section? How can I find out? How can I reduce it?
I ended up removing a lot of unused SDKs and cachces under ~/Library but even then that ...
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32 views
Unallocated Space after BootCamp not restored to main HD
I am unable to reclaim 1 TB of Unallocated Space to my main HD. Neither Disk Utility or BC-Assistant succeeds in restoring it to a single partition.
The underlying issue (after running sudo diskutil ...
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1answer
24 views
2016 Macbook SSD not able to format
Laptop was working fine, then one day I turned it on and it booted up to the Question mark folder. In Disk Utility I tried to erase it just reinstall Catalina. When I try to erase it, it gets stuck on ...
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1answer
35 views
Help with Disk, won’t boot
I was trying to factory reset my 12” MacBook A1534.
Went as instructed into recovery mode and clicked “erase” for the internal disk.
While I erased I went with the default set, “APFS format.”
The ...
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1answer
24 views
Reformatted Windows HDD shows up twice in Disk Utility
Had a 1TB hard drive in a Windows laptop that I replaced with an SSD. I've put the old hard drive in a USB enclosure so I can use it as an external drive.
I plugged it into my Mac and opened disk ...
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1answer
16 views
Unable to click continue while Reinstall/Disk utilities in Boot
I am try to upgrade Sierra to high Sierra, unable to click continue Upgrade/Reinstall,Disk Utility, Restore from machine backup, And Get help online in MacBook Pro booting time.
Kindly help me..
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1answer
30 views
Expand APFS container using free space located before the container within macOS
I have an SSD (disk0) that contains my macOS Mojave installation. SIP is enabled (and for reasons outside my control, cannot be disabled) so I cannot give the output for gpt -r show disk0 nor can I ...
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19 views
Disk Utility fails to erase external SSD, might be related to partition table
I have this external SSD that got passed around a couple of weeks ago and I think someone changed it to a Windows NTFS partition. When I try to delete files on the disk they disappear, but when I ...
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18 views
Problems were found with the partition map in external hard drive
I have a 1TB WD elements hard drive which I accidentally unplugged without explicitly "Ejecting" it from my Macbook air. Since then, I found a lot of files deleted from the hard drive. But ...
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1answer
77 views
I deleted by mistake my whole hard disk and now I can't reinstall macOS using Recovery Mode
In order to fix my problem I started my MacBookPro in Internet Recovery Mode, then I tried to create again the partitions/volumes using Disk Utility and I tried through the Terminal too, but so far I ...
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13 views
merging disk partitions
My disk currently is telling me there is only 10gig of available space however I know that not to be the case since in the past I done a rather large partition here is my diskutil:
diskutil list ...
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1answer
17 views
iMac issues: indicates hard disk needs replacing and can't get through AHT, should I do any other tests?
I have a long out of warranty/AppleCare iMac12,2 that meets me with an Apple logo and progress bar on boot, and after a few minutes simply shuts off w/o booting to the system. I did try running Apple ...
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1answer
22 views
Is a SSD with the following First Aid report salvageable?
Barely 2 months old Samsung NVMe M.2 SSD is not readable by my Mac anymore. This is an external disk in an enclosure. I purchased a different enclosure too to confirm that the problem is with SSD only....
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17 views
2TB USB drive not showing in diskutil, fsck not running, not showing in Finder
I recently purchased a 2TB USB drive and loaded a few files onto it after formatting it to FAT32 so I could use it on my TV.
I accidentally unplugged it without unmounting/ejecting it first and ever ...
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25 views
Macbook Air system fails and fsck does not work
My macbook air 13 (mid 2013) cannot boot correctly. It stops at the Apple logo loading screen.
After getting into the single user mode, here is the error I got by runningfsck -fy (didn't find any ...
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33 views
Manual Backup as Disk Image, timed out
I have an old LaCie 2big Network 2, (directly via LAN, no extra network,) which doesn’t want to work with Time Machine on Big Sur. I just want to use it as a safety backup for an old Mac I want to ...
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1answer
52 views
External hard drive I use for Time Machine corrupted, won't mount
Today I plugged in my external hard drive to back up to Time Machine, but it won't mount. I open up Disk Utility, run First Aid, and am greeted with a message that says "First Aid found ...
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2answers
72 views
Why can't I just dd an entire APFS disk?
I've received a new Mac that has come preconfigured with lots of junk.
Naturally, my first order of business is to wipe the disk and clean install macOS. But first, I want to create a bit-perfect, ...
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1answer
33 views
Cannot mount USB hard drive
I have a 4TB USB hard drive (WB Elements) that I want to mount On a Macintosh Pro 16.
Unfortunately it cannot be mounted and the Mac does not show up any error messages. It also does not show up on &...
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0answers
28 views
How to mount a .dmg file with a different volume name (or modify it once mounted)?
MacOS Catalina, 10.15.6
Given a .dmg file, foo.dmg, I want to be able to attach it so that its contents will be visible in the Finder application under the Locations section with an arbitrary name, ...
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20 views
How do I undo partitions on my iMac (I keep getting failed message “Mediakit reports not enough space on device for requested operation”
Hi I am trying to undo partitions made from a failed Windows 10 installation but it keeps failing or it won't give me the option to undo it on Disk utility.
This is what my partitioned drive looks ...
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1answer
18 views
Create 2 resizable logical drives from one physical drive under Catalina
I have partitioned a drive to create two logical partitions from one physical drive in the past, but the partitions were not resizable after I initially created them and it ended up being a nightmare ...
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1answer
72 views
macOS catalina install error - this disk doesn't use GUID partition scheme (Au Contraire!)
I am trying to upgrade an Late 2013 iMac from OS X 10.9.5 to macOS Catalina.
When I run the catalina installer, it hangs a bit and eventually let's me try to click the drive to install on. After ...
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1answer
41 views
Can't start mac because startup disk is missing
First off, I apologize if this is kind of jumbled. I am just extremely stressed because of this.
Long story short, i fell asleep with my mac playing Netflix. When I wake up i have to plug it in ...
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1answer
23 views
Backblaze and similar services not necessary for a small hdd? Upload full disk dmg to cloud services easier?
I understand the usefulness and convenience of a site like backblaze, but if I wanted an offline backup and my drive is under 100gb, would it make sense to just make an encrypted full disk dmg image ...
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12 views
See disk i/o stats per device
Is there some way I can see disk i/o stats per /dev/disk* devices for past few days?
Activity Monitor and systemstats give combined stats. Is this data logged somewhere or is there some other program ...
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48 views
How to get my files from my corrupted macOS hard drive?
My coworker stepped on my power cable and my mac lost the power and it won't boot anymore. I have backup but I also want to save files that are not backed up yet.
I am able to remove the hard drive ...
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2answers
40 views
Merge “free space” with Mac OS Volume
Let me tell the story from the beginning: I installed Big Sur on an unsupported Mac using guidelines at Medium. In the guide it was stated that I should create a separate partition for Big Sur, and ...
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14 views
Remove a container disc partition without bootcamp and do a factory reset
This is similar to other questions on here but I'm a little out of my depth and would really appreciate the help. I was gifted a macbook pro that had previously been partitioned to also run windows ...
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25 views
Extra disk with 0 byte of storage showing on mac
I have a 2017 MacBook Pro 15". I recently removed a windows partition. Now the disk utility is showing an HFS+ volume with 0 bytes of storage. I tried to remove it using disk utility, recovery ...
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29 views
MBP late 2013 High Sierra unknown partition(ffff…) with suspicious MBR
So I’ve followed a lot of the instructions I was able to find through a lot of similar issues that klanomath has been a mastermind at solving. I got all the way up to figuring out what my actual ...
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3answers
100 views
What is really meant by “Invalid B-tree node size”? How to solve it without expensive 3rd party softwares?
I've been having troubles with my external HDD and have been looking so hard for a solution.
I've tried everything. Diskutil, FSCK, testdisk. But only to find what I already know... "Invalid B-...
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23 views
Clean install still loads old data
A while back I erased the HDD on my old iMac, without installing a new OS.
Today, I plugged in a bootable High Sierra USB and installed that on it. I expected it to be a clean install, but somehow all ...
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1answer
32 views
Is there any way that we could load disk utility or any disk repair tool from a USB in mac?
Recently my Mac crashed due to kernel panic. I tried using disk utility to repair the disk but the parent disk couldn't be repaired. And I opened up the terminal and erased the current boot disk. And ...
