Not every USB drive can be used on Mac out of the box -- you need to format the drive to make sure it's compatible with the MacOS extended file system. And here in this article, we'll offer you a full guide on how to format a USB Drive on Mac. Besides, in case you lose important data due to formatting, we have a professional data recovery tool to help you recover data from a formatted USB drive on Mac.

• Bonus: How to Recover Lost Data After Formatting USB Drive

Part 1. What You Should Do First Before Formatting USB Drive on Mac

We can do it following these steps: Step 1: Download and install DoYourData Super Eraser; then, run the software on our Mac. Download for Mac Download for. Step 2: Choose mode ‘Wipe Hard Drive’. Step 3: Select device or drive we want to format and click on the ‘Wipe Now ’ button. DoYourData Super. Formatted USB Flash Drive Data Recovery software, free download. For a Mac user, he/she might format a removable disk for many reasons. It is necessary to format an external storage device, such as a USB flash drive, pen drive, and a memory card, to a proper file system, so that Mac OS X or macOS could recognize, detect or read data.

Make sure that уоu know clearly whаt уоu are doing whеn you begin the whole formatting process, which will еrаѕе your еntirе hаrd drivе.

To avoid formatting the wrong disk, firstly remove the USB drive from Mac, check the title of other storage disks, then insert the USB disk again and note the name of the disk. Next, drag the USB data to a safe location for backup/recovery measures before formatting it. Then you are set to get it done!

Adobe Flash Catalina

Part 2. What Is the Best Format for USB Drive on Mac?

You'll be given several format options when you try to format a USB drive on Mac, including Mac OS X Extended (Journaled), Mac OS X Extended (Case-sensitive, Journaled), Mac OS X Extended (Journaled, Encrypted), Mac OS X Extended (Case-sensitive, Journaled, Encrypted), MS-DOS (FAT) and ExFAT. If you are using macOS 10.13 or later, you'll also see an option named APFS, which is the default file system of macOS 10.13 and later.

1APFS (Apple File System)

APFS is a new file system for macOS. It's the most appropriate format for SSD. However, you need the latest macOS to write to this file system. If you're sure that you don't need to use it on a Mac running old version in the future, then you can format your USB drive to APFS.

2Mac OS X Extended (Journaled) & Mac OS X Extended (Case-sensitive, Journaled)

Mac OS X Extended, aka HFS+, is the default file system before APFS for macOS 10.12 and earlier. It doesn't put a limit on the size of files you can save on the drive, which is the greatest advantage. Windows-running computers can read the files formatted to Mac OS X Extended but can't write to them. And this file system is necessary if you plan on using the drive for Time Machine backups.

The biggest difference between Mac OS X Extended (Journaled) and Mac OS X Extended (Case-sensitive, Journaled) is the latter one is case-sensitive to folder names. For example, 'file' is different from 'File'. Therefore, if you do not have special needs, just ignore this option.

3Mac OS X Extended (Journaled, Encrypted) & Mac OS X Extended (Case-sensitive, Journaled, Encrypted)

These two are basically the same with the previous two but with encryption, which means you have to provide the password whenever you connect the drive to your Mac.

4MS-DOS (FAT)

This is Disk Utility's name for FAT32 file system. As the most widely compatible file system, it suits both Windows operating system and macOS. Therefore one can easily transfer data between PC and Mac using a USB drive formatted this way. However, a USB drive formatted to FAT32 doesn't support long file names and an individual file cannot be larger than 4GB.

5ExFAT

ExFAT is the improved version of the older FAT32, which offers larger storage space and supports files larger than 4GB. Of course it also supports transferring files between PC and Mac as a cross-platform file system.

To arrive at a conclusion, if you need to transfer smaller files between operating systems, choose MS-DOS (FAT) or FAT32. And with no doubt, ExFAT will be the best format for USB drive on Mac for larger files.

Part 3. How to Format USB to FAT32/ExFAT on Mac

As earlier stated, you need to first back up your USB drive before formatting it as the formatting operation will wipe all the data. Now, you can follow the steps highlighted below to get the USB successfully formatted.

Method 1: Format a USB Drive on Mac OS with Disk Utility

Step 1: Insert the USB waiting to be formatted to a Mac computer.

Step 2: Navigate to Applications > Utilities, and click it twice to open it.

Step 3: Select the drive you want to format and click on Erase.

Step 4: Rename the USB drive (optional), and choose one file system from the options.

Step 5: Then select Master Boot Record for scheme, hit Erase.

Step 6: Once the process is done, you are ready to use the drive with new file system to store data again.

Method 2: Convert/Format USB Drive to FAT32/ExFAT

Step 1: Connect the USB drive to your Mac computer.

Step 2: Click on cmd + space to run Spotlight, input terminal then tap Enter key.

Step 3: Type diskutil list to find the location of your USB drive (eg: dev/disk2 is the USB drive in the below picture).

Step 4: Type sudo diskutil eraseDisk FAT32 MBRFormat /dev/disk2.

• sudo gives you user right.

• Diskutil calls disk utility program.

• eraseDisk commands the formatting.

• FAT32 sets the file system.

• MBRFormat tells disk utility to format with a Master Boot Record.

• /dev/disk2 is the location of the USB drive.

Note: You can replace FAT32 with ExFAT in the command, and your USB drive will be formatted in that way.

After the process completes, type diskutil list in command once more to check if the USB drive has been formatted successfully.

Format Flash Drive Mac Catalina Installer

Bonus: How to Recover Lost Data After Formatting USB Drive

Formatting a USB drive is never an easy task and problems tend to arise from time to time, among which data loss is perhaps the most common one. Users format a USB drive by mistake or directly format it without doing any backup job and both mistakes will cause data loss disaster. This issue will worry us even more when there are important files we cannot offord to lose. If this is the case, you'll need a professional data recovery software to help you get back lost files, and AnyRecover is what you need exactly. With this software, anyone can recover all kinds of data from formatted USB drive on Mac with only 3 simple steps.

As a comprehensive Mac data recovery solution, it handles all data loss scenarios, including formatting USB drive, hard drive failure, and Mac crash.

All-round and deep scan ensures high recovery rate, and sophisticated algorithms contribute to quick scanning speed.

Supports data recovery on all types of USB drives in various file formats like NTFS, HFS+, FAT32, and ExFAT.

Brings back the lost photos, videos, documents, compressed files, etc. - numerous kinds of data from formatted USB drive easily.

Provides preview before recovery and enables selective recovery.

AnyRecover offers free trial for every user, with which one can scan, preview and recover 3 files for free. Just download and have a try! The more time for hesitation, the less possibility for your lost data to get back!

Follow the simple steps below to recover data after formatting USB drive on mac:

Step 1: Make sure you have connected your USB drive to your Mac successfully. Download, install and launch AnyRecover. Then select the formatted USB drive you are trying to recover data from as the location to find data. Press the 'Start' button to initiate the scanning.

Step 2: The software will immediately begin the scanning process. You can pause the process at any time and resume from that point later.

Step 3: Immediately after the scanning process is complete, all the files will be listed in their respective file formats and folders. Freely preview and choose what to recover by clicking on 'Recover' button.

Final Words

Formatting is a complicated process indeed but by clearing your mind and then follow the steps as listed out in the article, you can successfully format a USB drive on Mac without much difficulty or errors. Loss of data may come as a nightmare but AnyRecover is powerful enough to help you out. In fact, not just after you format a USB drive, it can work wonders whenever you lose data. Try it and you won't be disappointed.

Apple hasn’t shipped operating systems on physical media in a full decade, but there are still good reasons to want a reliable old USB stick for macOS Catalina. Luckily, it's not hard to make one—either with a handy graphical user interface or some light Terminal use. Here's what you need to get started:

Mac Catalina Iso

• A Mac that you have administrator access to. We've created a USB stick from both Mojave and Catalina, but your experience with other versions may vary.
• A 16GB or larger USB flash drive or a 16GB or larger partition on some other kind of external drive. A USB 3.0 drive will make things significantly faster, but an older USB 2.0 drive will work in a pinch; 8GB drives worked for Mojave and older versions of macOS, but the Catalina installer is just a little too large to fit.
• The macOS 10.15 Catalina installer from the Mac App Store (in High Sierra or older macOS versions) or the Software Update preference pane in Mojave. The installer will delete itself when you install the operating system, but it can be re-downloaded if necessary.
• If you want a GUI, take a look at Ben Slaney's Install Disk Creator from MacDaddy. There are other apps out there that do this, but this one is quick and simple.

If you want to use this USB installer with newer Macs as they are released, you'll want to periodically re-download new Catalina installers and make new install drives. Apple rolls support for newer hardware into new macOS point releases as they come out, so this will help keep your install drive as universal and versatile as possible.

There's also one new consideration for newer Macs with Apple's T2 controller chip—as of this writing, that list includes the iMac Pro, the 2018 Mac Mini, the 2018 MacBook Air, and 2018 and 2019 MacBook Pros, though Apple keeps an updated list here. Among this chip's many security features is one that disallows booting from external drives by default. To re-enable this feature, hold down Command-R while your Mac reboots to go into Recovery Mode and use the Startup Security Utility to 'allow booting from external media.' If you're trying to install an older version of macOS, you may also need to go from Full Security to Medium Security to enable booting, but if you're just trying to install the current version of macOS, the Full Security option should be just fine. And if you're just doing an upgrade install rather than a clean install, you can run the Catalina installer from the USB drive from within your current installation of macOS, no advanced tweaking required.

The easy way

Once you've obtained all of the necessary materials, connect the USB drive to your Mac and launch the Install Disk Creator. This app is basically just a GUI wrapper for the terminal command, so it should be possible to make install disks for versions of macOS going all the way back to Lion. In any case, it will work just fine for our purposes.

Install Disk Creator will automatically detect macOS installers on your drive and suggest one for you, displaying its icon along with its path. You can navigate to a different installer if you want, and you can also pick from all the storage devices and volumes currently connected to your Mac through the drop-down menu at the top of the window. Once you're ready to go, click 'Create Installer' and wait. A progress bar across the bottom of the app will tell you how far you have to go, and a pop-up notification will let you know when the process is done. This should only take a few minutes on a USB 3.0 flash drive in a modern Mac, though using USB 2.0 will slow things down.

The only slightly less-easy way

Catalina Flash Player

The Install Disk Creator is just a wrapper for the terminal command to create macOS install disks, so if you’re comfortable formatting your USB drive yourself and opening a Terminal window, it’s almost as easy to do it this way. Assuming that you have the macOS Catalina installer in your Applications folder and you have a Mac OS Extended (Journaled)-formatted USB drive (which is to say, HFS+ and notAPFS) named 'Untitled' mounted on the system, you can create a Catalina install drive using the following command.

sudo /Applications/Install macOS Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled

Download Catalina Mac

The command will erase the disk and copy the install files over. Give it some time, and your volume will soon be loaded up with not just the macOS installer but also an external recovery partition that may come in handy if your hard drive dies and you're away from an Internet connection. If you would like to create an install drive for a macOS version other than Catalina, just tweak the paths above to refer to Mojave or High Sierra instead.

Format Flash Drive Mac Catalina Patcher

Whichever method you use, you should be able to boot from your new USB drive either by changing the default Startup Disk in System Preferences or by holding down the Option key at boot and selecting the drive. Once booted, you'll be able to install or upgrade Catalina as you normally would. You can also use Safari, Disk Utility, or Time Machine from the recovery partition to restore backups or troubleshoot.