Erasing your disk: For most reasons to erase, including when reformatting a disk or selling, giving away, or trading in your Mac, you should erase your entire disk.

Erasing a volume on your disk: In other cases, such as when your disk contains multiple volumes (or partitions) and you don't want to erase them all, you can erase specific volumes on the disk.

Erasing a disk or volume permanently deletes all of its files. Before continuing, make sure that you have a backup of any files that you want to keep.

How to erase your disk

1. Start up from macOS Recovery. Then select Disk Utility from the Utilities window and click Continue.
   If you're not erasing the disk your Mac started up from, you don't need to start up from macOS Recovery: just open Disk Utility from the Utilities folder of your Applications folder.
   
2. Choose View > Show All Devices from the menu bar in Disk Utility. The sidebar now shows your disks (devices) and any containers and volumes within them. The disk your Mac started up from is at the top of the list. In this example, Apple SSD is the startup disk:
   
3. Select the disk that you want to erase. Don't see your disk?
4. Click Erase, then complete these items:
   • Name: Type the name that you want the disk to have after you erase it.
   • Format: Choose APFS or Mac OS Extended (Journaled). Disk Utility shows a compatible format by default.
   • Scheme: Choose GUID Partition Map.
5. Click Erase to begin erasing your disk and every container and volume within it. You might be asked to enter your Apple ID. Forgot your Apple ID?
6. When done, quit Disk Utility.
7. If you want your Mac to be able to start up from the disk you erased, reinstall macOS on the disk.

How to erase a volume on your disk

Both Windows and Mac OS offer built-in disk formatting tool. For Windows, it offers quick format feature when you right-click the hard drive on the computer. If you are using a Mac, you can run the built-in Disk Utility to quickly format a hard drive or external hard drive under Mac OS. NO.1 USB drive formatting software for Mac – DoYourData Super Eraser. DoYourData Super Eraser. 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. The macOS installer file is large with approximate size of 6 to 10GB depending upon the.

1. Start up from macOS Recovery. Then select Disk Utility from the Utilities window and click Continue.
   If you're not erasing the volume your Mac started up from, you don't need to start up from macOS Recovery: just open Disk Utility from the Utilities folder of your Applications folder.
2. In the sidebar of Disk Utility, select the volume that you want to erase. The volume your Mac started up from is named Macintosh HD, unless you changed its name. Don't see your volume?
3. Click Erase, then complete these items:
   • Name: Type the name that you want the volume to have after you erase it.
   • Format: Choose APFS or Mac OS Extended (Journaled). Disk Utility shows a compatible format by default.
4. If you see an Erase Volume Group button, the volume you selected is part of a volume group. In that case, you should erase the volume group. Otherwise, click Erase to erase just the selected volume. You might be asked to enter your Apple ID. Forgot your Apple ID?
   
5. When done, quit Disk Utility.
6. If you want your Mac to be able to start up from the volume you erased, reinstall macOS on that volume.

Reasons to erase

Format Usb For Mac Os Windows

You can erase at any time, including in circumstances such as these:

• You want to permanently erase all content from your Mac and restore it to factory settings. This is one of the final steps before selling, giving away, or trading in your Mac.
• You're changing the format of a disk, such as from a PC format (FAT, ExFAT, or NTFS) to a Mac format (APFS or Mac OS Extended).
• You received a message that your disk isn't readable by this computer.
• You're trying to resolve a disk issue that Disk Utility can't repair.
• The macOS installer doesn't see your disk or can't install on it. For example, the installer might say that your disk isn't formatted correctly, isn't using a GUID partition scheme, contains a newer version of the operating system, or can't be used to start up your computer.
• The macOS installer says that you may not install to this volume because it is part of an Apple RAID.

About APFS and Mac OS Extended

Disk Utility in macOS High Sierra or later can erase using either the newer APFS (Apple File System) format or the older Mac OS Extended format, and it automatically chooses a compatible format for you.

How to choose between APFS and Mac OS Extended

Disk Utility tries to detect the type of storage and show the appropriate format in the Format menu. If it can't, it chooses Mac OS Extended, which works with all versions of macOS. If you want to change the format, answer these questions:

• Are you formatting the disk that came built into your Mac?
  If the built-in disk came APFS-formatted, Disk Utility suggests APFS. Don't change it to Mac OS Extended.
• Are you about to install macOS High Sierra or later for the first time on the disk?
  If you need to erase your disk before installing High Sierra or later for the first time on that disk, choose Mac OS Extended (Journaled). During installation, the macOS installer decides whether to automatically convert to APFS—without erasing your files.
• Are you preparing a Time Machine backup disk or bootable installer?
  Choose Mac OS Extended (Journaled) for any disk that you plan to use as a Time Machine backup disk or as a bootable installer.
• Will you be using the disk with another Mac?
  If the other Mac isn't using macOS High Sierra or later, choose Mac OS Extended (Journaled). Earlier versions of macOS don't work with APFS-formatted volumes.

How to identify the format currently in use

If you want to know which format is currently in use, use any of these methods:

• Select the volume in the Disk Utility sidebar, then check the information shown on the right. For more detail, choose File > Get Info from the Disk Utility menu bar.
• Open System Information and select Storage in the sidebar. The File System column on the right shows the format of each volume.
• Select the volume in the Finder, then choose File > Get Info from the menu bar. The Get Info window shows the Format of that volume.

If your disk or volume doesn't appear, or the erase fails

1. Shut down your Mac, then unplug all nonessential devices from your Mac.
2. If you're erasing an external drive, make sure that it's connected directly to your Mac using a cable that you know is good. Then turn the drive off and back on.
3. If your disk or volume still doesn't appear in Disk Utility, or Disk Utility reports that the erase process failed, your disk or Mac might need service. If you need help, please contact Apple Support.

Learn more

• If you can't start up from macOS Recovery, you can use a different startup disk instead.
• If Disk Utility shows a Security Options button in the Erase window, you can click that button to choose between a faster (but less secure) erase and a slower (but more secure) erase. Some older versions of Disk Utility offer the option to zero all data instead. These secure-erase options aren't offered or needed for solid-state drives (SSDs) and flash storage.

Formatting in context of USB or Hard Drives means deleting everything from that drive and rebuilding the file system so that we can use it with an Operating System. And we usually perform formatting in our USB or External Hard Drive when we want to get rid of viruses, or we want to clean the disk as it was when we purchased it. Also when we buy a new USB or Hard Drive, it often comes with windows compatible not the mac so formatting it even needed in this case. So in this post, I will tell you “How to Format USB on Mac?”.

How to Format USB on MAC?

If you never formatted a USB drive then don’t worry it is effortless. And here I will tell you two answers to this question that “How to Format USB on Mac?”. First, we will go with the straightforward way of doing it; then we will move to the easy way. 😉

So first, we will use the Disk Utility program, which is a GUI and very straightforward so that any kid can do it. Then in the next method, we will format USB drive from mac terminal. So let’s start.

Format USB on Mac using Disk Utility

• Connect the USB Drive to your Mac. (This is obvious we need a USB first, then only we can format it 😛 )
• Now we need to open Disk Utility. (Here I will give you one more tip. To open any program in your Mac just press the command + spacebar. It will start the Spotlight Search, now from here you can search for any program, but now we need Disk Utility, so search it).

• Now, on the Disk Utility window you will see External Drives on the left.

• Here I have my USB Drive connected, and its name is No Name. In the top we have options like First Aid, Partition, Erase, Restore, Unmount. To format the drive we need to click on the Erase Button.

Format USB on Mac

• Here, we have two options, the first one is the Name that you can set for your USB Drive. The second one is the Format. If you want to make it windows compatible you need to select MS-DOS (FAT) here. And you can also use the Mac OS Format. So its up to you what you want.
• Now, just click on the Erase Button to complete the format.

Format Usb Drive For Mac Os

• And thats it. Your drive is formatted.

For formatting any External Hard Drive, we can follow the same steps.

Format USB Drive Mac using Terminal

Format Usb For Mac And Pc

We also have a Command Line Disk Utility interface in Mac. And we can use it to format the USB on Mac as well. Now lets see how we do this.

• First open the terminal (Again press command + space, write terminal and hit enter).
• In terminal now type the following command.

• The above command will display all the disk connected with your machine.

• Here the USB Drive that is connected, is disk2 and we will format this disk only. To format the USB drive here we will write the following command.

• In the above command eraseDisk is the format command. Then comes JHFS+ is the Disk Type which is Mac OS Extended (Journaled). Then Belal is the name of the disk that will be assigned after formatting. Finally we are writing the name of the disk that we need to format, which disk2 is in this case. Now hit enter.

• And the disk is formatted. 😉 Super Easy, isn’t it?

So that’s it for this tutorial friends if you got some problems then tell me in the comments. And if you think this post was useful for you, or it helped you in any way, then I request you to please SHARE it with your friends. I hope you got the answer very clearly that “How to Format USB on Mac?”. So thank you, guys. Will catch you in the next post.