All external USB disks can be formatted to work on Mac OSX, but not always straight out of the box.
Now click the Erase tab. Set the format to Mac OS Extended (Journaled) and the Scheme to GUID Partition Map.If you selected the drive name instead of its description you won’t see the Scheme option.
In this tutorial we look at formatting disks via the GUI app called Disk Utility and its equivalent command line tool diskutil. This will work in all modern versions of Apple Mac OSX including 10.9 Mavericks, 10.8, 10.7 and 10.6.
Initially external disks may be formatted for Windows and after you connect it to your Mac it appears in the device list in the Finder, but is a read only disk meaning that you can’t write to it in its current format.
The when the disk is selected in the finder bottom left symbol with the crossed out pencil means that the disk can only be read not written to. Why this is, is because they come formatted as Windows NTFS drive which OSX can only read, so we need to reformat them so we can read and write – thats where a handy utility called Disk Utility comes to the rescue.
Reformat Apfs Thumb Drive To Mac Os Extended FreeDisk UtilityFormat Flash Drive Mac Os Extended Journaled In Windows![]()
Disk Utility is found in /Applications/Utilities/Disk Utility.app, open it and select your external disk in the list on the left.
There are 2 items (or more) for each disk, you have the actual disk and the volume of the disk, the example below has the Disk Named 2 TB WD Elements and the Volume is named Elements, this example uses the Volume which will in turn also format the Disk.
Then below you will see the Format type which will be NTFS or possibly MS-DOS (FAT), we need to reformat the volume and make the format Mac OS Extended (Journaled).
Reformatting the Disk
Still with the external disk selected in Disk Utility go to the Erase tab, select Mac OS Extended (Journaled) from the format dropdown, choose to name the disk and then click Erase.
And there you have it one read and writable disk ready for OSX.
The Security Options option next to erase can control how the disk is erased by zeroing out all the blocks on the disk, this then make it impossible to salvage any previous data, with new disks this is not necessary.
Also the other format option Mac OS Extended (Case-sensitive, Journaled) in the dropdown would allow you have same name files or folders in the same location with a mix of case like ‘red’ and ‘RED’, this is popular in the Linux disk format and also possible on OSX but not the default on OSX shipped disks.
Doing it on the line
You can also do this using the command line using the tool diskutil which is the command line interface to Disk Utility, launch Terminal, Applications/Utilities/Terminal – to see a list of your disks:
and the results are similar to:
This gives us a lot of information including the disk identifiers, size of disk and partitioning scheme. So in this example we will reformat the actual disk, disk2 using the command:
Here the command diskutil eraseDisk does the erasing, format is expressed as JHFS+ which is the Mac OS Extended (Journaled) and disk is named BackupMaster and the actual target disk is defined by its identifier disk2. The Terminal will result in this output:
And there you have it one formatted disk ready to go.
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by Shirly Chen, updated on 2019-07-08 to Mac Data Wipe
USB drives and external hard drives on macOS Catalina are used for storing and backing up important data such as photos, videos, audios, images, notes, messages, music files, PDF files, Word documents, among other files. Sometimes, we delete some of these files because we do not need them, but they remain somewhere and can be retrieved from the same device or using a data recovery software. In some cases, we want to carry out this task in a permanent way, but we do not have any idea about how to do it. Here, we will show you how to permanently format and delete your files and so prevent a possible data recovery.
![]() Three ways to format USB flash drive, external hard drive on macOS Catalina
There are many tools can help you format USB flash drive, portable hard drive, memory card or other storage device on macOS Catalina. Here, we will show you three ways to format USB flash drive, external hard drive, etc on macOS Catalina.
1. Format USB flash drive/external hard drive with Disk Utility on macOS Catalina
Disk Utility is a built-in disk management application on macOS Catalina. You can run it to format the USB flash drive, external hard drive on macOS Catalina. But, the formatted data can be recovered by Mac data recovery software.
2. Format USB flash drive/external hard drive with MacClean360 on macOS Catalina
MacClean360 also offers disk management tool, disk manager. This tool can help you securely and quickly format USB flash drive, external hard drive under macOS Catalina. The formatted data also can be recovered by Mac data recovery software.
3. Format USB flash drive/external hard drive and permanently wipe data on macOS Catalina
If we are planning to sell, donate or dispose our USB flash drive or external hard drive to another person, we should format them to clean up all data, even this is also an option if we want to recover their complete storage. Maybe, we do not know how to format our device properly and permanently to avoid retrieving our private files. here, we will help you choose the best way to format/wipe your device on macOS Catalina; you can use DoYourData Super Eraser for Mac, which is highly recommended by users.
External hard drive exfat or mac os extended. Feb 26, 2018 Question: Q: External SSD ExFAT vs Mac OS Extended I have a WD My Passport SSD that I left it in the default ExFAT format that it ships with. I am moving a folder of 508 GB (according to Finder) of project files from a spinning disk encrypted external disk that is formatted as Mac OS Extended. ExFAT: AFPS and Mac OS Extended only work on Macs and can’t be used for other operating systems. ExFAT is the file system which is compatible with both Macs and Windows. It is thus a cross platform file system which can be used for external drives either plugged to a Windows PC or a Mac with consummate ease. How to Choose the File System. Sep 20, 2019 Mac OS Extended, also known as HFS Plus or HFS+, is the file system used on all Macs from 1998 until now. On macOS High Sierra, it’s used on all mechanical and hybrid drives, and older versions of macOS used it by default for all drives. ExFAT is the best cross platform option, designed to work on Windows and macOS systems.
DoYourData Super Eraser for Mac can help you format USB flash drive, External hard drive or other device on macOS Catalina. And it will permanently wipe all data from the USB flash drive or device. Once the USB flash drive/external hard drive is formatted by this software, all data on the USB flash drive/external hard drive will be gone forever, can’t be recovered by any data recovery method. So, before you format your USB flash drive or external hard drive with DoYourData Super Eraser for Mac, you’d better back up your data to a safe location.
The steps to format USB flash drive/external hard drive on macOS Catalina are pretty simple.
Mac os free password protect for usb hard drive. The following steps will allow you to create a new password protected disk image on Mac: Connect your external hard drive to Mac via USB. Launch Disk Utility from Applications directory. Click on New Image from the top panel in Disk Utility.
Step 1: Download DoYourData Super Eraser for Mac.
Download and install this disk formatting tool for macOS Catalina. Then run it from Launchpad. And connect the USB flash drive or external hard drive with your Mac.
Step 2: Format and wipe the USB flash drive/external hard drive on macOS Catalina.
Choose mode “Wipe Hard Drive”, then choose the targeted device and click on “Wipe Now” button. Then the selected USB flash drive or external hard drive will be formatted and all data on the selected device will be permanently erased.
The three ways above can help you securely and easily format USB flash drive, external hard drive on macOS Catalina. We strongly recommend DoYourData Super Eraser for Mac. It will help you format and wipe data before you sell, donate, or give away your hard drive, USB flash drive, memory card, digital camera, portable hard drive, etc.
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