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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1answer
859 views

How to create exFAT or NTFS RAID 1

I am looking for a way to create a RAID 1 Volume from macOS Sierra with a format that will be readable from both Mac and Linux. Using DiskUtility I can not seem to find a way to format the RAID in ...
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23 views

Give Free Space from “Free Space” partition to a specific partition

After some issues with my internal disk, I moved my OS on an external drive which is split into : - (disk2s2) Macintosh HD (Apple_HFS): my operating system; - (disk2s5) Volume 1 (Apple_HFS): My ...
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29 views

Mac HD won't mount - FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF Error [duplicate]

Same error as a lot of users here, but I'm running Catalina, so I'm not sure if that changes things and I would rather make sure I'm going about it the right way so I don't make things worse. I ...
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3answers
49 views

RAID storage drive failed - what to do?

I have a macOS Server setup which is connected to two RAID (0, I think) systems. One of them does not work anymore. Disk Utility shows that one drive is missing/damaged. It is not missing, thus it ...
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1answer
36 views

How can I remove mounted volumes from the list that are no longer attached?

I have a problem and I suspect that it might be a symptom of a hardware issue though I am hoping I'm wrong. If I connect an external drive or mount a disk image it shows up in finder and I can see ...
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1answer
21 views

Force Quit Disk Utility to Cancel 7 pass Erase and Now Disk is not usable

I accidentally performed a 7 pass erase on my usb drive, and I don't want to wait that long time so I forced quit the Disk Utility. However, after doing that I found out that my disk is kind of ...
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1answer
42 views

What is the command to remove a container and reclaim the space?

I was trying to bootcamp my Mac, but it failed halfway through and left me with a 50 GB container I can't delete. It's just a single one I can’t touch. I know there's commands to delete containers, ...
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28 views

Repairing Mac SSD from Windows when HFS/APFS viewers don't work

My friend's 2015 13" MacBook Pro had water spilled on it, and no longer works. I want to extract the files contained for him. I removed the SSD from the Mac, and connected it to my Windows 10 laptop ...
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2answers
93 views

Where are the MacOS startup boot icons located?

Where is the exact location of certain icons like the internal storage drive icon you often see in the startup boot manager and other boot icons like it located on MacOS? MacOS Catalina 10.15.2
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26 views

Why is it necessary to perform manual clean-up of APFS partition/container when removing one copy of macOS on a dual macOS install?

In Remove macOS from a APFS container? there is an answer by @"David Anderson" that states that if you install 2 copies of macOS on separate volumes within the same partition/container, then try to ...
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4answers
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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 ...
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1answer
39 views

Partition Type: FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF appeared when tried to remove Linux(UBUNTU 18.04) from dual boot from Mac

I earlier had dual-booted my MacBook Pro(2013), Catalina OS with Ubuntu 18.04 LTS. I wished to remove it, so I erased the unwanted partition in disk utility and restarted my mac, it did not show the ...
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1answer
106 views

How to delete APFS Volume

I am trying to delete a volume and have one whole disk left, without volumes or partitions. I played around with partitioning and deleting multiple times and now it seems, I can't do anything. This ...
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1answer
39 views

How to restore a disk image to source disk using Disk Utility?

I've created a .dmg using Disk Utility from a 32 GB source drive. Now I'm back in Disk Utility in order to restore this disk image to the very same source disk it was created from. I thought it would ...
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0answers
27 views

Mac OS Extended (Journaled) HDD showing space used, but empty in finder

I have a 1 TB Toshiba USB External HDD that I formatted to Mac OS Extened (Case-sensitive, Journaled). (I'm not sure why I did the "case sensitive" part, probably an accident). When I open the drive ...
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1answer
47 views

How to increase the size of the system partition (container) on Catalina?

This is on a Macbook Pro with a 250 GB disk that was originally split into two partitions, roughly 90 (Macintosh HD) and 160 GB (disk2). The machine is now on Catalina with the first partition being ...
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0answers
19 views

Hard drive without partition scheme

I will try to be short with this. I have a 3tb hard drive that shows likes this: frosti:~ abelpinate$ diskutil list /dev/disk0 (internal, physical): #: TYPE NAME ...
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1answer
111 views

How to rebuild Mac partition showing unexpected GPT table size

I'm attempting to rebuild a Mac partition for an external 3TB Hitachi hdd that recently failed to mount. Apart from an unexpected GPT table size which I'll show later, this drive issue seems similar ...
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2answers
105 views

Removed first partition, how to resize second partition into the free space?

Mac Mini running Sierra. I have a 500GB internal drive, that was partitioned into two volumes because at one point I wanted to test upgrading from Mavericks to Sierra but wanted to make sure ...
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4answers
49k views

Can't change folder permissions

I'm running Mountain Lion and I have a folder in ~/sites that has a red icon on the folder and I can't open it because 'access is denied'. What I've tried: Get Info > unlock with admin password, ...
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0answers
21 views

External Hard Drive accidentally turned off and won't show any files

I recently bought a hard drive and when I connected it to my laptop, the partition option was not available in Disk Utility. So I looked on the Apple Forums and found a solution, which included ...
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1answer
69 views

How can I properly remove Linux and resize the partition if it's showing FFFFFFFFFFFF-FFFFF-FFFFF without turning off my Macbook?

Having deleted both linux partitions from my device using sudo diskutil eraseVolume free none disk0s4 and sudo diskutil eraseVolume free none disk0s3 In an attempt to then have both partitions ...
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1answer
49 views

MacOS GPT Messed up File System ('FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF')

I had tried dual booting Linux and macOS, and when I rebooted my computer the OS volume shows as type 'FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF'. I tried following OS volume shows as type 'FFFFFFFF-...
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1answer
26 views

Create encrypted partition for Time Machine from command line using diskutil or gpt, instead of Disk Utility?

I can use Disk Utility to create an encrypted partition, intended for Time Machine backups. I would choose the Mac OS X Extended (Journaled, Encrypted) format. However is there also away to achieve ...
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1answer
233 views

How to uninstall Linux from a MacBook properly?

There are a lot of questions by those who have already bricked their macs trying to remove Linux so their questions usually stem from a position where one of the disk is labelled FFFF-FFFFFFFF-and ...
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1answer
11k views

Reformat exFat with specific Device Block Size and Cluster Size

I have an 512 GB SSD on my MacBook Retina with one of the volumes disks0s6 formatted with exFat to use it on both Mac and Windows. diskutil info disk0s6: Device Identifier: disk0s6 ...
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1answer
53 views

Why does “diskutil eraseVolume …” add an extra “Apple_Free” partition

My question is about why "diskutil eraseVolume" adds an extra partition to an APM partition table. A little history will help understand the situation better I think -- had a 240GB APM style disk on ...
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0answers
44 views

In APFS move the Preboot, Recovery and VM volumes to make room to expand the Macintosh HD volume?

Looking at this listing you can see that my Container is 499.2GBs but the Volumes inside it only add up to ~240GB. That is because I sector-copied the disk to a larger disk then installed the larger ...
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4answers
22k views

Mac OS Sierra - Disk Utility will not let me partition an external hard drive

Within disk utility, the partition icon is grayed out. If I mouse over it, it reads: "Disks with Master Boot Record Partition Maps cannot be partitioned". The history on this drive: It is a 2 TB ...
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1answer
16 views

How do I remove/delete a (possibly corrupt) partition from macOS High Sierra?

I have a partition (disk0s2) I can't seem to get rid of. The size is very tiny around ~3KB. Disk Utility is unable to remove/erase or repair this partition. Also, the '-' button seems to be disabled. ...
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1answer
128 views

The disk Macintosh HD can't be unlocked

I am getting "the disk Macintosh HD can't be unlocked" popup error after reinstalling Catalina. I checked Disk Utility, there are 3 partitions named, "Macintosh HD", "Macintosh HD - Data", "Macintosh ...
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5answers
33k views

Changing a Volume's “Device / Media Name”

I know a Mac volume can be renamed... obviously. But if you look at the output of diskutil you will see that a volume also has a "device name" that corresponds to the name it was given when it was ...
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2answers
63 views

Disk is almost full after restoring to factory defaults

After restoring my Macbook pro 2016 (MacOS Catalina 10.15.2) to factory setting, it told me that my disk is almost full, but that is highly unlikely, as I have just restored it ! Here is diskutil ...
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2answers
562 views

Why do I have /Volumes/Storage Drive?

In Terminal, I noticed I have /Volumes/Storage Drive. On my mac, I have no drive named Storage Drive. Furthermore, no Storage Drive appears in Finder or Disk Utility. When I cd inside Storage Drive ...
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60 views

Mac Hangs on boot, Macintosh HD partition intermittent failures

I have the following problem: My 2016 MacBook Pro (El Capitan) hangs on boot. The progress bar loads to near completion, after that it stops. The laptop heats up and eventually shuts down. What I ...
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35 views

Is it safe to erase disk1s1 APFS Volume?

Bought a 2nd hand 2016 MacBook Pro with Catalina installed. Went back to Mojave (because some SW does still not work properly in Catalina). Now is see disk1s1 as empty APFS volume and disk1s5 as the ...
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0answers
41 views

Recovering a partition not shown in Disk Utility

My MacBook Pro 2012 has 500 GB of HDD out of which 250 GB were used to install Windows 10. Today, I tried deleting the Windows 10 partition using Boot Camp. In the middle of the deleting process my ...
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15answers
290k views

How can I repair a disk that Disk Utility says it can't repair?

I have an external hard-disk with a single Mac OS Extended partition. This disk stopped working couple of days ago. I tried to repair the partition with disk utility but no luck. The error message is ...
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1answer
326 views

Macbook pro, disk utility and external hard drive

I have a Macbook Pro running on Lion. My external hard drive is a Buffalo and used as data backup only, and is formatted to Macs. I have used the ext. hard drive for two years with no issues. I am ...
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1answer
60 views

How can I reset SSD on MacBook Air

I changed the motherboard of a MacBook Air A1465 11" mid 2013 because the previous one had a problem with the RAM. I boot the device in recovery mode in order to install the OS but the SSD is not ...
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1answer
92 views

Bootcamp “Missing Operating System” on external drive

I've been using an external disk drive to use boot camp on my MacBook Pro (13-inch, Mid 2012). It's 1TB, so recently I added a partition to store extra files on it (350GB for boot camp, 650GB for ...
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1answer
75 views

APFS, two data volumes on a single OS partition for dual booting

I'd like to be able to switch between two Data volumes on the same macOS installed partition. My thinking is that I could have one data volume for home and one for work. This would, essentially, ...
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0answers
36 views

fsck_hfs invalid key length

The HDD is a brand new MyPassport WD 4Tb. I recently used it as my main backup and before I had the time to reformat another drive for a second backup (which means that some data on that drive are ...
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0answers
77 views

SSD not recognised by MacBook Air

I changed the motherboard of a MacBook Air A1465 because the previous one was faulty and the Mac didn't even start. Now the machine starts but when I try to install, neither the macOS installer app ...
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0answers
27 views

Cannot format SD Card [duplicate]

I'm having trouble formatting this SD card. The write protect switch is off, of course. I tried using the built-in card reader on my MacBook Air and then a USB one. It won't even format on my Windows ...
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0answers
20 views

How to repair encrypted disk image which suddenly stopped recognizing password

I was in the middle of remotely backing up to a mounted encrypted sparse bundle (using rsync) when the machine was rebooted. Since it was an orderly shutdown, presumably the image should have been ...
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1answer
64 views

iMac 27“ Mid 2011 - Can‘t reinstall macOS

I‘m trying to reinstall macOS Sierra on my Mid 2011 iMac. I have a single 1 TB HDD and single partition called „OS X Base System“ that takes up 999.35 GB‘s. When I try to partition the Base Volume I ...
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2answers
170 views

Deleting files and empty trash does not increase free space

I have a MacBook Air running macOS Catalina 10.15, upgraded from an older version. There's only a few 10s of megabytes free on the disk, but deleting files and emptying the trash doesn't change the ...
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3answers
82 views

How to read data from an unreadable drive formatted by a GoPro?

I formatted a 128 GB micro SD card from the factory in a National Geographic Explorer 4 4K 30 fps (a camera like a GoPro). It recorded video and I can play it back. On macOS Mojave 10.14.6, I get the ...
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0answers
40 views

Repair Disk Permissions in Terminal seems to hang

OK, I tried following (OS X Yosemite) the instructions here https://support.apple.com/en-us/HT203538 And I went into Terminal and typed in the following diskutil resetUserPermissions / id -u But ...

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