It’s possible to format from a mac with a USB to SATA cable which is on its way from eBay, but right now, the computer i have has one SATA connection and it doesn’t like the unformatted drive - even when booting from the ‘Install OS X Seirra’ USB drive. Use Disk Utility to Format USB Flash Drive on Mac. The simplest way to format a disk in Mac OS is to simply use the Disk Utility since it is the Mac’s built in disk maintenance tool. To format USB drive on Mac using this method, all you need to do is plug in the USB device into your Mac and select it from the Disk Utility’s sidebar menu.
Nowadays, when you buy a USB drive, you can use it right out of the box with your Mac. However, unless it’s been designed for use with a Mac, it won’t be formatted using macOS’ preferred file system (either Mac OS Extended or APFS, depending on which version of macOS you’re running).
That’s because most of the computers in the world run Windows, and Windows uses a different file system, usually one known as Fat32. Drives formatted as Fat32 can be read from and written to by macOS, but it’s not optimal and you’re more likely to run into problems than if you use macOS’ native format. So, if you’ve bought a USB drive that’s formatted as Fat32, or any other format other than Mac OS Extended (also known as HFS+) or APFS, here’s how to format a USB drive on Mac. It’s exactly the same procedure if you need to reformat a flash drive on a Mac.
How to format a USB drive on a Mac
1. Plug the drive into a USB socket (if you have a recent MacBook or MacBook Pro that only has USB-C connectors, you’ll need a USB-C to USB-A adaptor).
2. Open a new Finder window and click on the drive. Make sure it has no files on it that you need. The process of reformatting it will wipe all the data from it.
3. Once you’ve copied any files you need from the USB drive to your Mac, go to Applications>Utilities and double-click on Disk Utility.
4. Click on the USB drive in the sidebar and then choose Erase from the toolbar at the top of the window.
5. In the window that drops down type a name for the formatted drive in the box next to Name.
6. Choose a format from the dropdown menu.
Format Usb Flash Drive Mac Os X
7. If you have previously stored sensitive data on the drive, click the Security tab.
8. Choose a security level using the slider. The further to the right you move the slider, the more ‘passes’ the erase tool will make and the more securely files will be deleted. However, it also increases the time it takes to format the drive quite considerably.
9. Click Ok then click Erase.
Tip: You don’t need to erase a whole drive to delete files securely. If you have confidential files or sensitive data you need to remove from your Mac completely, you should use CleanMyMac’s File Shredder. It’s specifically designed to securely delete sensitive data and will render it unrecoverable. You can download CleanMyMac X for free here.
Which format to choose?
If your Mac is running macOS High Sierra or later, you have two options for file formats: APFS and Mac OS Extended. Which should you choose? The key point is that disks formatted as APFS won’t be recognized by Macs running versions of macOS older than High Sierra. So if you think you might need to plug the USB drive into a Mac running an older version of macOS, format it as Mac OS Extended.
APFS is optimized for SSD (solid state drive) such as flash drives, so if you reformat a flash drive on a Mac, you should definitely choose APFS (unless you plan to use it with a pre-High Sierra Mac, of course). Even on hard drives, however, APFS is faster and more reliable than Mac OS Extended.
Finally, if you plan to use the USB drive as a destination for Time Machine backups, choose Mac OS Extended. Time Machine can’t currently back up to an APFS disk and if you select one for use with Time Machine, it will offer to reformat it as Mac OS Extended. You can, however, backup an APFS formatted disk to a Mac OS Extended Time Machine drive.
How to format a USB drive to FAT32 on a Mac
The main reason for formatting a USB drive as Fat32 on a Mac is that you want to be able to use the drive on a Windows PC, as well as a Mac — perhaps to transfer files between the two machines. You may also be preparing the drive for use as, say, a storage device for a media player or to record TV programmes on a TV with a USB port.
The fact that Fat32 can be read from and written to on both Mac and Windows makes it very versatile. However, there is a significant limitation — individual files have a maximum size of 4GB. So, if you’re using the USB drive to store large video files, you may run into trouble. There is a solution, however, exFAT. Unlike FAT32, exFAT doesn’t have a maximum file limit. Better still, it can be read from and written to on any Mac running Mac OS X Snow Leopard or later and on Windows.
To format a USB drive in FAT32 or exFAT:
1. Plug the USB drive into your Mac.
2. Go to Applications>Utilities and launch Disk Utility.
3. Click on the USB drive in the sidebar in Disk Utility.
4. Click Erase in the Disk Utility toolbar.
5. Type in a name for the formatted disk.
6. Click on the Format menu and choose either MS-DOS (FAT32) or ExFAT.
7. Click Erase.
Your USB drive will now be erased and re-formatted as either FAT32 or ExFAT, depending on the format you chose in step 6.
How to manage your drives easily
If you look for a quick and easy way to manage your drives, try using CleanMyDrive 2. With its help, you can drag-and-drop files directly to any drive, clean hidden junk from external drives, and check disk stats. It works for all drives, including USB drives, SSD, SD cards, external hard drives. All the drives will be at hand in the menu bar, so you can get to see types of drives you have and manage them easily. CleanMyDrive is absolutely free to use, so download it on the Mac App Store and enjoy!
It’s very easy to format a USB drive on a Mac using Disk Utility. There are a couple of things you should keep in mind, however. The first is that when you format and disk, you will erase all the data currently on it. So if you need that data, make sure you copy it onto another disk before you start. Secondly, there are several formats to choose from, each with advantages and disadvantage. Use the guide above to help you decide which is right for you.
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Yo just got a new external hard drive and want to use it on your Mac. However, the Mac OS does not allow you to write data to the drive. You may wonder how to reformat an external hard drive on Mac. Follow the tutorial below, you'll get everything covered.
Bonus: How to Recover Data from Formatted External Hard Drive on Mac
Format Mac Drive In Windows
Reformatting an external hard drive for use with Mac OSX is not as difficult as it might seem. In a few simple steps you are ready to go and can save your back-up files to the external drive, keeping your information safe and giving you peace of mind. Keep in mind that a MAC can generally read other file formats, but for the best performance and to create a bootable disk, formatting exclusively for MAC is required.
Part 1: Which File Format You Should Choose?
Before you begin formatting the drive, there are a few things to do. The most important, you should decide which format to use.
There are a few file formats you can use, but it depends on the purpose you want to use the drive for. Which one is right for your circumstance? We'll describe them here, you'll know your choice after reading the details.
APFS: This is the default file system in Macs with High Sierra. It is efficient and reliable. However, it won't be readable and usable on machines that are not running Mac High Sierra, and Windows or Linux PCs. What's more, it is compatible with SSD and flash storage devices only.
Mac OS Extended (Journaled/HFS+): If you didn't update your Mac OS to High Sierra, the default file system on your Mac shoule be Mac OS Extended. Mac OS Extended (encrypted) would be an ideal option if you probably carry your laptop or external drive here and there. You can encrypt it so that no one can access the contents on your drive.
MS-DOS FAT (aka FAT32): In addition to Mac, it can also be written and read by Linux and Windows. It enables you to regularly share files with your friends who own a PC. Nevertheless, this older file system is limited to no more than 4GB and there might be security issue and disk errors.
ExFAT: It is similar to ExFAT which can be read by both Windows and Mac, but it can store more than 4GB files.
NTFS: As the default file system in Windows, it can only read by Mac OS, writing to it is not available. Luckily, there are third-party tools to help you do so.
Part 2: Format External Hard Drive for Mac with Disk Utility
Formatting an external hard drive would erase everything on it. Hence, you must backup your important files before reformatting the drive if you want to save them. The easiest way is to drag it from one drive to another.
All is set, then you can go ahead to format the drive on your Mac. Disk utility - the MacOS utility application can help you with this. Just follow these steps below:
Step 1. Connect the external drive or the USB drive to the MAC.
Step 2. Start the Disk Utility, located under Applications > Utilities.
Step 3. Find the name of the drive in the left side of the Utilities window and select it. And click Erase button.
Step 4. Follow on-screen prompts to choose Mac OS Extended (Journaled) file system and allow the disk to format.
Bonus: How to Recover Data from Formatted External Hard Drive on Mac
In case you forgot to backup files before formatting the external drive. Here comes the cure - iMyFone AnyRecover - a one-stop solution to recover deleted, lost or formatted files from Mac.
Follow these simple steps using AnyRecover to get your files back!
Get Ready!
First, download and install AnyRecover, following on-screen prompts to accomplish the task.
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Get Set!
1. After loading AnyRecover, plug your external hard drive into your Mac directly or via USB.
2. Next select the drive under 'External Removable Devices' tab, click 'Start' to begin scanning lost files on the drive.
Go!
1. AnyRecover takes a moment to scan your drive. Once done, it will list out all scanning results by file type.
2. Double click a single file to preview it before recovery.
3. Select the files and press Recover to get them back.
What If?
What if my files were not found? Fear not. We can take this a step further. Enable 'Deep Scan' to try one more time, follow the steps above just as before to locate and recover your files.
It is plain to see that AnyRecover for Mac is a tool worthy of top shelf treatment in your arsenal of items that are used to defend, recover and keep your system up and running. Don't get caught without the file you need for that meeting or stumbling looking for baby photos that were stored on disk and suddenly 'hid' from your view. Allow AnyRecover to find and recover your lost files. AnyRecover is easy to use but provides sophisticated results that mean you know what you're doing!