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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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SSD 860 evo slow format/write/read

MacBook Pro 13 early 2011 Coming from a 850 evo Booting from High Sierra USB Installed 860 but disk info and gpt show take a couple of minute to complete. Had problem with sata cable but now my 850 ...
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8T external HDD failing to format

Disk Utility is failing to format an 8T external hard drive on my iMac. I keep getting an error stating Unable to write to the last block of the device: (see below): How might I troubleshoot this?
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Format Macbook 2, 1 running 10.4.1

I bought a MacBook 2, 1 at a market day and the user didn't wipe the computer. I was wondering how to format it to basically start fresh. I’ve tried booting to recovery mode and Command Rdoesn't ...
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Is my SD card beyond repair?

I've looked on other questions and from those answers I have tried SDFormatter and it produced this error: [ERROR] Invalid end of sector signature: 0x4536 [ERROR] exfat_check_validate_boot_sector ...
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mac OS Installer lingers after failed Mojave 10.14.3 to 10.14.4 update

I've worked this problem w Apple Mac L2 across two phone calls lasting a total of 5 hours and escalation to L3 without a possible resolution, hence opening up my search to the world. My ask: What ...
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1answer
27 views

Recover data with file structure HFS+ on Mojave

I'm desperate and trying almost everything. That's what happened. I was having problem with Time Machine. One file was not letting time machine finish the backup. But to discover this took me a while. ...
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1answer
30 views

Will a Disk Wipe Be Logged?

Currently I'm running Mac OS Yosemite. I've booted into the recovery partition and I'm using disk utility to perform operations on my main partition. My questions are: If I erase other partitions ...
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1answer
81 views

How do I format a big disk (4TB) for use in both macOS and a Raspberry Pi?

I need to setup a big hard disk (4TB) so that I'll be able to use it in both macOS and in a Raspberry Pi. Up to now all my attempts failed - at the moment I have formatted it so that it uses GPT, ...
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239 views

Formatted an NTFS partition to Mac extended Journaled by mistake

I was creating a bootable Mojave usb for a friend on my Mac and by mistake instead of formatting the USB drive I formatted an NTFS partition on an internal disk to macOS Extended (Journaled). The ...
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1answer
34 views

Accidentally formatted High Sierra operating system, how to reinstall?

A family member has accidentally formatted her High Sierra operating system on her Apple computer. Over the phone, she asked me how to download and reinstall the operating system again. I haven't much ...
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1answer
183 views

broken partition table after formatting drive with apple file system (apfs)

I wanted to try out apfs, therefore I formatted my external HDD with it. Now the partition table seems broken. How can I reinitialize the drive? My goal is two create two HFS+ partitions, each 1TB on ...
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1answer
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How do I recover from asr typo?

I was converting the recovery partition from Apple_HFS to Apple_Boot as per instructions here. It was successful. As an experiment though, I tried an intentional typo to see if it would reflect on ...
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Can't erase disk, Error: -69760

I am trying to format a USB drive, however I am faced with the following error: sh-3.2# diskutil unmountDisk force /dev/disk3 Forced unmount of all volumes on disk3 was successful sh-3.2# diskutil ...
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1answer
34 views

How to get data from a MacBook Pro hard drive on a Windows computer?

My MacBook Pro is not working anymore, I have some valuable data that I want to retrieve right now. This question is only software related. I can handle all the hardware stuff. I know that the ...
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1answer
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I created free space and I don't know to recover it

So I followed this answer here Merge partitions with Macintosh HD And I ended formatting my old bootcamp partition into free space. But now I am unable to see the free space anywhere. When I go to ...
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Question mark folder on startup, how can I recover?

I have a problem with the iMac 27 2012 .. At startup the folder tag appears Then when you go to Recovery mode and go to disk utility the internal disk is not found so I can’t format or reinstall ...
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1answer
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Aligning, moving and enlarging partitions seems impossible

A friend's MacBook (mid 2009 model) was stuck at the boot screen and I have discovered that the HDD was failing, so I've replaced the failing regular 320GB HDD with a Samsung 860 evo 500GB SSD. I ...
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Error Code -36 Copying Files from Windows NT Formatted Drive to exFAT Drive (select files only)

The gist of the problem is this: I have a large amount of video and audio footage that I need to consolidate from multiple drives - namely this Windows NT Filesystem formatted Seagate Expansion Drive ...
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1answer
394 views

Reinstallation mac os x el capitan

Is it possible to reinstall mac os x el capitan to a macbook pro (2009) using a bootable usb made in windows? The internal disk is already erased and empty.
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1answer
185 views

Old HDD reformatt issue

So I have a HDD I want to format to use with my Mac. I think the portion Microsoft basic data is probably some kind of boot drive. How do i delete it? This is the return from terminal It’s disk2s2 ...
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367 views

How to make existing Mac OS Extended (Journaled) file system case sensitive?

I've got a fairly large external Thunderbolt RAID-5 filesystem partition. When I get info (cmd-I) it says "Format: Mac OS Extended (Journaled)". Further, when I test for case-sensitivity: transom:...
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1answer
786 views

Unable to format Mac internal drive (disk0)

I have an macbook air late 2008 running osx El capitan and I wanted to erase my driver and reinstall the macos. So first i booted into recovery mode and tried formating my hard dive in disk utility ...
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Recover overwritten Encrypted OS X volume (APFS)

Is there a possibility to recover a 2TB APFS partition that has been altered by a fomatting command to a new 2TB APFS partion (i.e. the real data has not been deleted, encryption password is knonw, ...
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1answer
78 views

Encrypt a DVD-RW?

While I can create an encrypted thumb drive easily enough with Disk Utility, I wonder how can I create an encrypted DVD+R disc which, when I put it in the drive, causes MacOS to ask me for a password?
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1answer
147 views

Reclaiming space used by deleted partition

A few days ago I installed Mac OS and Linux Mint on my 2015 MacBook pro. I created a 412GB APFS container for mac and used the other 100GB for Linux. After wrestling with the issue, I learned that ...
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1answer
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How does Disk Utility wipe the disk it's executing on?

Maybe I am misunderstanding the functionality as a whole but how does Disk Utility wipe the disk it's executing on? For example, if you were to erase yourself there would still be a hand left.
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Accidentally deleted external USB Drive and now I can't access it

I accidentally formatted an external USB Drive to APFS, I needed to change it back so I found this walkthrough: https://www.techrepublic.com/article/how-to-revert-back-to-apples-hfs-from-apfs/ and I ...
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1answer
15k views

OS X base system is locked, unable to install Sierra on Mac

I made a boneheaded mistake while erasing my hard drive (can’t tell you what that mistake was) and now I can’t reinstall macOS! Can someone tell me what I need to do so I can free up the hard drive ...
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2answers
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How do I delete these partitions on my iMac?

How do I delete the disk0s2 partition (see below) on my iMac's internal drive?? /dev/disk0 (internal, physical): #: TYPE NAME SIZE IDENTIFIER 0: ...
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1answer
43 views

What format did old Macintoshes used?

I need what format did it used to use to revive my old Macintosh Plus. So I'm doing a research on what format did old Macintoshes used. (on hard drives or hdds). What I mean with this is what format ...
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1answer
337 views

How to restore Mac partition

I'll preface this question with the obligatory "I did something stupid"... I wanted to factory restore my 2012 MacBook Pro. I did Command-r, and later Command-Option-r, but both times Reinstall ...
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1answer
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How to know the macOS version used for most recent clean install?

Is there a way to know which macOS or OS X version was initially "clean-installed" on a particular Mac computer? (Assuming major or minor OS updates may have been installed later.) Please note that I ...
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1answer
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formatting external drive multiplatform compatible filesystem from macOS High Sierra

I have a 160GB external hard drive connected via USB I pulled it from a windows pc to MacBook running MacOS High Sierra, I want to format the hard drive to a file system that should work with Windows, ...
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2answers
105 views

Re-formatting a external Western Digital My Book drive

My new Western Digital My Book external drive will not erase to re format for my iMac. That is to say it starts but then goes no where. No green in the bar. What's up?
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124 views

Seagate expansion format for mac

I buy a new one. I am trying to format support for my mac air. I tried all the way by seeing some procedures showing on the youtube even no luck. I disk is appearing like this: Need help, please
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2answers
1k views

Unable to format USB flash

I am trying to format my USB flash in ExFAT format to make it work on both Mac and Win devices. But I am unable to format my USB flash because I am getting an error when trying to format it via ...
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1answer
51 views

How to restore deleted files from an internal HDD which has just undergone a full disk format?

I was recently restoring macOS from one partition to the other during which all files got corrupted. Since none of the files were opening I did a complete format and reinstalled macOS Now my ...
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3k views

Change APFS Volume to case sensitive

I have a macbook pro with 1TB internal glued flash drive, of which around 600GB are full. I would like to change the volume format from APFS (case insensitive, encrypted) to APFS (case sensitive, ...
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1answer
5k views

Format new SSD as OS X Extended (Journaled) from PC

I’ve just got a new hard drive but my Mac won’t accept it as boot drive unless it’s formatted in a macOS readable format - it’s simply not readable by the volatile system (which is what’s run if no OS ...
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1answer
2k views

TSplicedFont failed creating descriptor for El Capitan

So I've bought used macbook air, wanted to format it to delete all traces of previous user. Unfortunately after trying to reinstall I get spammed with this error message: Language Chooser[416:4031] ...
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1answer
1k views

Is there a way to automatically format/delete my SSD after x failed login attempts?

On iOS there is the option to have the device delete all data after 10 failed login attempts. How can I have the same option on macOS so that my SSD gets deleted/reformated after x failed attemps to ...
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1answer
38 views

Restore flashdrive to original state diskutility

I have pen drive which has two partitions with almost no storage in each. The full size of the things is 8GB as you can see in the image below. The problem is diskutility commands eraseDrive and ...
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2answers
1k views

Create an APFS RAM disk

There are various resources about how to create a RAM disk, but they all deal with HFS+ RAM disks. But how does one create an APFS RAM disk? I tried passing APFS as file system to the diskutil ...
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1answer
105 views

How to reformat a HDD to show the proper size?

Long story short. On my iMac I had a Fusion Drive: 250GB SSD + 750GB HDD. The SSD failed totally, is completely dead. HDD seems to be OK. I replaced the SSD and erased the HDD. The HDD seems to be ...
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1answer
209 views

Samsung Portable SSD t3 2TB drive only shows 250GB capacity

I am running Mac OS X El Capitan 10.11.6. My 2TB Samsung T3 only shows 250GB Capacity. I have installed the activation software from: http://www.samsung.com/semiconductor/minisite/ssd/download/...
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1answer
3k views

What's the difference between “Initialize” and “Erase”?

I was recently handed an old backup hard drive that my co-workers couldn't read because it used one of the EXT file systems. They didn't tell me what they wanted at first, so I assumed I should try to ...
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reformat a GPT external HDD to MBR/exFAT

I am currently looking for a solution (if it exists) to change my external 4 TB SATA HD from a GUID Partition Table to an MBR with an exFAT volume. I did not see an already answered solution but if ...
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1answer
42 views

How do I install Windows 10 on Mac without removing the existing Linux partitions?

I have a MacBook Air (El Captain) with Kali-Linux dual booted. Well, kind of. It's a 4 GB partition for live and a 15 GB partition for persistency. So, all I wanted to know is, do I have any ...
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2answers
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Locate long file paths on external drive with terminal

I need to move a large volume to a new raid server that's PC formatted. However I have a couple paths and filenames that are interrupting this process. I would just like to know how to use the ...
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2answers
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reuse Microsoft Office USB stick with 7.9 GB - Error: -69877: Couldn't open device - dd: /dev/disk9: Permission denied

I have a USB stick from Microsoft, which was used to ship Office 2016 for Mac. I don't use Office 2016 for Mac, so wish to use this stick for other purposes. /dev/disk9 (external, physical): #: ...