- #HOW TO ERASE USB DRIVE MAC UNMOUNT DISK ERROR HOW TO#
- #HOW TO ERASE USB DRIVE MAC UNMOUNT DISK ERROR FOR MAC#
- #HOW TO ERASE USB DRIVE MAC UNMOUNT DISK ERROR FULL#
- #HOW TO ERASE USB DRIVE MAC UNMOUNT DISK ERROR SOFTWARE#
$ sudo dd if=/dev/zero of=/dev/diskX bs=1m Triple check the device name! $ diskutil unmountDisk diskX ← Only if necessary (you get a "Resource Busy") This is the nuclear option because it will overwrite every single spot on the device with a zero. Using this command writes zeros to every block of the raw device, meaning you're bypassing everything and accessing the device itself. $ disktuil partitionDisk diskX 1 MBR FAT32 UNTITLED 100% ← MBR with MS-DOS $ diskutil partitionDisk diskX 1 GPT HFS+ Untitled 100% ← GPT with HFS Format
#HOW TO ERASE USB DRIVE MAC UNMOUNT DISK ERROR FULL#
use diskutil listfilesystem to get a full list of supported file systems. I like to force a rewrite of the partition map to something that macOS is familiar with like a GPT partition and HFS+ file system. $ diskutil eraseDisk free Empty /dev/diskX As the name implies, this does a simple erase of the disk and marks the free space as "empty" with no file system or partition scheme. There are a few steps you can take, but all are destructive to the data on the device.Įrase Disk. Using an Admin account will usually get around this.
Sometimes the drive may have had user privileges assigned to them. Make sure you have the correct privileges. On USB flash drives, there may be a physical switch or it may be write protected from via a write protect bit, or the chip may be modified from the factory. If it's write protected on every SD, you may have an issue with the logic board itself. On SD cards, there is a physical "write lock" switch that may become enabled. If you're having an issue where you can't access the device there are a couple things to check first: This is an attempt to write a canonical QA for this issue, as per the Meta post: Where is the list of canonical questions stored for Ask Different? This answer is based off a number of pre-existing answers expect it to be periodically edited with the goal of becoming a comprehensive information resource. ➜ ~ diskutil resetUserPermissions /dev/disk2 `id -u`Įrror encountered attempting to reset permissions for user 501 home directory on disk2: Permissions are not enabled on the disk (-69861) My USB drive appears as read only when i do CMD+I, I tried repairing the permissions but that failed too. ➜ ~ diskutil eraseDisk free EMPTY /dev/disk2 ➜ ~ diskutil eraseDisk FAT32 MYSD MBRFormat /dev/disk2
➜ ~ diskutil eraseVolume exFAT MyName /dev/disk2s2Įrror: -69760: Unable to write to the last block of the device I've tried a bunch of commands that I've found here and there in the terminal, but none of them worked, like: ➜ ~ diskutil eraseVolume exFAT MyName /dev/disk2 dev/disk2 (external, physical):Ģ: Microsoft Basic Data Lexar 63.9 GB disk2s2
Then run it from Launchpad.Disk Utility (macOS Catalina 10.15.2) fails to erase my USB drive (64GB key, currently formatted in exFAT).
#HOW TO ERASE USB DRIVE MAC UNMOUNT DISK ERROR FOR MAC#
Step 1: Download and install DoYourData Super Eraser for Mac on your Mac. You just have to follow a few steps to be able to permanently wipe data on a damaged USB flash drive under Mac OS. So we present DoYourData Super Eraser for Mac that is a powerful data erasure tool specially designed to destroy information permanently even in damaged USB flash drive.ĭoYourData Super Eraser for Mac is a very simple tool to use.
#HOW TO ERASE USB DRIVE MAC UNMOUNT DISK ERROR HOW TO#
How to permanently erase data on damaged USB flash drives under Mac OS?Īlthough Mac OS has a Disk Utility that is a factory application that allows data to be deleted in storage device, it is often not effective to eliminate them correctly, because as we mentioned there is a probability of recovering that data with data recovery software.
#HOW TO ERASE USB DRIVE MAC UNMOUNT DISK ERROR SOFTWARE#
So it is advisable to eliminate all traces of information contained before discarding it, but often the formatting is not enough because there is a large amount of software that allows recovering and restoring the information contained in the USB flash drive even if it is damaged, as well that a Mac tool is needed to prevent this from happening. Many times a USB flash drive ends up being damaged for some reason and we choose to discard it, but despite presenting some type of damage, the information contained inside can be accessed and/or recovered by questioning our data privacy.
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