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Questions tagged [disk-format]

refers to formatting, or erasing a disk, deleting all data on the disk

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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
1 vote
2 answers
541 views

Command to format a raw floppy disk image with FAT12?

I'm new to OS Development, and I want to format a 1.44MB floppy image with the FAT12 file system. I created the disk using dd if=/dev/zero of=<my image> bs=512 count=2880, so it's just a raw ...
axolotlKing0722's user avatar
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Should format a new 20TB hard drive as Mac OS Extended or APFS for better data recovery chances in the future?

I have a Macbook and bought an internal 20TB hard drive that I am using through a docking station. I am wondering if I should format the drive as Mac OS Extended or APFS, if for example one day the ...
user321627's user avatar
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1 answer
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how to format entire MacBook Pro (flash kernel + ram + disk ....)

I want to format everything. Is it possible without opening the device ? It's a MacBook Pro (13-inch, 2020, Four Thunderbolt 3 ports) running Ventura 13.3.1 (a) (22E772610a)
enzo's user avatar
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Can't delete file in a USB Key

Deleting file on a usb key has become impossible since I try to export photo from an Iphone to an external USB key with the application "photos". The Usb key continue to work properly when ...
Softon's user avatar
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343 views

External SSD partition map damaged, can't format (69773/found zeroed-out block/69623)

So my external SSD (1TB Samsung 970 evo plus in an Orico TB3 housing) died. I unmounted it but probably didn't wait long enough and unplugged the drive before completing the unmounting procedure. So ...
Géza Korb's user avatar
2 votes
1 answer
637 views

Formatting a large SD card is taking time. What happens if I pause it?

A few days ago, I formatted an SD card with Mac OS Ventura to make it bootable. Then, I wanted to reverse this process and use the SD card for transferring files again. So, I followed the instructions ...
Rohit Pandey's user avatar
2 votes
1 answer
1k views

Safari can’t open the file “.dmg” because no available application can open it

macOS Monterey 12.5, MacBook Air, M1, 2020 I am pretty sure I was learning how to partition my disk to install Linux and I may have done something with diskutil like unmounting my primary disk. I have ...
Julius Hamilton's user avatar
1 vote
0 answers
24 views

Keyboard layout persisting after disk erasure/OS reinstall

Today I erased Macintosh HD and re-installed the OS (Catalina 10.15.7) in an attempt to start everything from scratch on my Macbook Air (Early 2014, pls don't judge me haha). One of first things to do ...
Bill Heap's user avatar
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empty disk0 and formatting fails

I have experienced a problem (a forbidden sign) so I booted with the install CD (on a iMac7.1). The disk utility didn't do, so I tried formatting the disk to start again, and it hasn't worked either. ...
Yves Capdeboscq's user avatar
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I erase the Macintosh HD and now i cannot install macos again [duplicate]

I decide to buy a macbook, but I have a problem with the mac os. Because the MacBook has an intel processor after the last update the keyboard stops working, lagging, and all of this. I decide to go ...
Apostolis Dimitriou's user avatar
2 votes
2 answers
139 views

Recover partition on HPFS/QNX/AUX + Extended LBA drive. Blank TYPE in diskutil

I'm attempting to recover some data from an old 60GB IDE 2.5" drive from an old Windows laptop. diskutil list gives /dev/disk5 (external, physical): #: TYPE NAME ...
vegarab's user avatar
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2 votes
1 answer
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How to migrate Nintendo Switch's MicroSD data using a Mac?

I am considering upgrading my Nintendo Switch's storage by getting a MicroSD card with a larger capacity and then copying over the games, savegame data, etc to the new card. Although Nintendo has a ...
Mentalist's user avatar
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APFS RAID mirror - can it be done, and anyone have experience?

So I've moved most of the server functions off my trusty Mac Mini 2012, and am looking to set it back up as my desktop driver for the time being. When running macOS off external drives with none of ...
FreelancerJ's user avatar
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Can I test multiple disk simultaneously? (In disk Utility or a third party program)

For example, if I have multiple USB drives, an SD Card, an internal SSD, and multiple external SSDs and HDDs connected to a mac, I would like to save time and run First Aid/Repair/Erase/etc. on ...
M. Y. Zuo's user avatar
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Why does data remain after disk erase and factory reset - macOS Monterey

I've tried to erase and factory reset my MacBook, using Erase All Content and Settings in System Preferences. However, after completing the operation, and configuring the MacBook again, I can find the ...
user avatar
2 votes
1 answer
174 views

Failed macOS 12.3 update

This morning after Time Machine did its usual backup, I decided to to the update to macOS 12.3 on my MacBook Pro 13” 2020 (no repairs have been done on this unit). System Update downloaded the ...
agarza's user avatar
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1 answer
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Hard drive not showing in Recovery Mode despite reformat in HFS+

Same issue as related in this thread but I already did the following: Re-created a new GPT (GUID) partition table (using GParted, Ubuntu) Created an HFS+ partition specifically for my MacOS Re-...
James69's user avatar
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Format SanDisk Extreme Pro SSD V2 on Mac

Formatting (erasing) SanDisk Extreme Pro 55AF Media works but looks unusual in Disk Utility (image): Erase: SanDisk Extreme Pro 55AF Media Name: SD Format: APFS Scheme: GUID Partition Map Result: ...
Yatko's user avatar
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2 votes
1 answer
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Disk Utility with extra Mac HD after clean install on Monterey (formerly Big Sur)

Not sure if I need to re-format and re-install again. Is it normal to see so many Mac HD, and should I try to remove the extra ones? Had some HD issue where somehow there was no space left and thus ...
ina's user avatar
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Internet Recovery. Unlike Monterey, Sierra OS X Utilities starts with wi-fi connected, even after a nvram reset and a disk erase. How?

On boot, when I press Shift+Option+Command+r, a globe appears with a dropdown box to choose my ssid and password. After some time the Sierra Utilities starts and my wi-fi connection is enabled. This ...
Daisuke Jigen's user avatar
2 votes
2 answers
814 views

How to factory reset and wipe clean a macbook pro with APFS filesystem?

I have a Macbook pro with HD (not SSD) upgaded up to Big Sur. I formatted it and reinstalled BigSur (to be configured). I would like to clean all data (but keeping a boot option or OSX installation if ...
Francesco Boi's user avatar
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53 views

Indication of remaining time to format an external HDD

Is there any way to see how long it will still take to format an external hard drive? I used Disk Utility to do so, and it now just tells me "Formatting...", without any indication of the ...
texnic's user avatar
  • 329
2 votes
1 answer
670 views

Unable To Partition Internal SSD, Trying To Dual Boot with Linux

I am running macOS Big Sur 11.5.2 and I am trying to partition my internal hard drive so I can Dual-Boot PopOS, which is a linux distro. However, I am having problems with partitioning my internal ssd....
theamazing0's user avatar
12 votes
1 answer
1k views

Can I convert a volume from journaled to non journaled without formatting it?

I have an external hard drive with HFS+ journaled. I have read that for some intrinsic reason, on a Linux machine I will not be able to write on such disk (while I am already able to read from it), as ...
Fabio's user avatar
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1 vote
1 answer
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Can I Format/Erase This Disk?

I purchased an iMac (Catalina) from a guy on FB a few months ago and I recently found some of his old files on an internal Crucial 250GB SSD. I got in touch with him and asked if he needed any of them ...
Black Beard's user avatar
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130 views

New SSD does not show in Disk Utility

I wanted to upgrade the internal SSD of my Mid 2013 MacBook Air. I bought a normal M2 SSD and an adapter. The ssd is not shown by diskutil ls. The output of the command is shown in the screenshot. ...
Burschken's user avatar
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285 views

External USB disk only shows up as core storage logical volume via diskutil list, can't erase or otherwise manipulate

My drive got hosed along the way. (Possibly related, more frequent kernel panics). My solution is to zap, do a backup, clean install OS and it'll all be copacetic. Trouble is, the external will only ...
Eric R's user avatar
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2 votes
0 answers
43 views

Finding the right directory to install applications into?

I just downloaded the MS Teams app for MacOS and upon installation was asked if the app should be for all users/ current user/ installed on hard drive. I understand the first two, but was wondering ...
Lauls0001's user avatar
2 votes
2 answers
786 views

macOS Big Sur can format drive but can't mount it

I have a USB stick and can format the stick, but when I try to mount it, the following error occurs: The error is in German, it means "Mounting of "Ohne Titel" has failed. (com.apple....
ZweiLinkeSchuhe's user avatar
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1 answer
660 views

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 ...
Mutlu's user avatar
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0 answers
258 views

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/...
user3743266's user avatar
0 votes
1 answer
828 views

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 ...
korre's user avatar
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1 vote
1 answer
128 views

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 ...
Daniel Porto's user avatar
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2 answers
7k views

How do I use MacOS Terminal or other app to format an MBR FAT32 SD card as a 0x0C partition, rather that 0x0B?

Apple's Disk Utility app can format an SD card as MBR FAT32; but in the Terminal, I confirmed the SD card's partition is in fact 0x0B: > sudo gpt show /dev/disk3 start size index contents ...
JDW's user avatar
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1 vote
1 answer
272 views

Linked MBP to my account even after erase

I have to send my MacBook Pro M1 back to Apple as a replacement. I tried to format it but it didn't work (I think)(I used disk utility and erased Macintosh HD) as it still shows the activation screen ...
localhost's user avatar
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1 answer
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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. ...
Bert Johnson's user avatar
0 votes
1 answer
1k views

Which partition do I need to format or fix in order to install Sierra or lion?

I have tried in vain to get my MacBook Air back up and running. I did a system restore or reinstall a while back and something broke. I've tried command+R and a bootable USB, there doesn’t appear to ...
Alex.Barylski's user avatar
3 votes
1 answer
1k views

How to create a bootable USB Drive that will boot on BOTH an Intel Mac and a PC

I recently created a bootable USB Thumb Drive containing a Linux Live Distro. I created it on a PC running Windows and tested it successfully on the same PC. Now I want to run the same Linux OS on my ...
Chris's user avatar
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1 vote
0 answers
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Will the dd disk clone commandline include partitions of various formats on macOS Catalina? [duplicate]

My original question was closed because it's assumed this thread (What is the best way to clone a disk between two Macs?) answers my question, so I am rephrasing my question and title. The author in ...
sekizuri's user avatar
2 votes
2 answers
636 views

Macbook Air Full Factory Reset?

I want to reset my Macbook Air Early 2015 but not just simply deleting the disk and reinstall it with macOS Utilities menu. What I mean is "full factory reset." I want it to be like it just ...
Efe's user avatar
  • 51
3 votes
2 answers
8k views

How to change allocation size for external ssd on mac?

I recently purchased a Sandisk Extreme SSD to work with Mac and Android. Is it possible to create 2 exFAT partitions of the drive? (Currently, I managed to do a combination of exFAT and HFS/Mac OS ...
shubhamagarwal92's user avatar
9 votes
3 answers
17k views

How to "securely" erase my MacBook's SSD

I would like to sell my Macbook Pro, but I want to make sure that there is no way to retrieve the deleted data from my SSD. Is there a way to completely delete all files on a hard drive so that even a ...
Lory's user avatar
  • 203
0 votes
0 answers
567 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 ...
eccentric_daughter's user avatar
2 votes
1 answer
578 views

Macbook pro 16inches 2019 fails to reinstall catalina on recovery mode after erasing hard drive, and T2 chip dissallows to boot from external drive

hope you can help me here. My MacBook Pro 2019, 16 inches, with a T2 security chip, systematically times out when trying to reinstall Catalina in recovery mode, after erasing the main drive. The T2 ...
alek's user avatar
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0 votes
1 answer
383 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 ...
Clown's user avatar
  • 35
1 vote
1 answer
719 views

Is it possible to make a mbr legacy bootcamp win 10 from a gpt partitioned catalina hdd 10.15.7 with bootcamp 6?

I tried to install win10 to ssd via efi boot on my macbook air 2012, it ran pretty well as far as performance, but because it's pre-uefi it makes it the garbage windows version with no sound, no ...
Toddd's user avatar
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0 votes
0 answers
41 views

Can't format internal (USB) drive because of Read-Only [duplicate]

I have a macbook (running MacOS Catalina) connected to a HP 3005pr 3.0 Port Replicator. This port replicator has a internal USB disk, I want to format this disk but am not able because it is Read-Only ...
t013463's user avatar
0 votes
0 answers
97 views

Corrupt internal APFS Catalina disks can’t boot & be removed

Internal disk (disk0 & disk1 APFS) and internal PCIe (disk2 & disk3 APFS) are corrupted. Currently booting from an external usb thumb drive (disk4 & disk5 APFS) and I can’t seem to erase/...
daironin's user avatar
1 vote
1 answer
4k views

What name, format, and scheme should be chosen in order to "factory reset" a MacBook Pro?

I am following What to do before you sell, give away, or trade in your Mac and during step 7 (Erase your hard drive and reinstall macOS), the fourth step is "Click Erase, then complete these ...
stevec's user avatar
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