By Adela D. Louie, Last updated: August 27, 2019
- When formatting a flash drive on Mac you are asked to choose a format. You must choose according to the use you will give it. If you plan to use your USB memory only on computers with Mac OS X, choose Mac OS Plus (with registration) or Mac OS Plus (upper/lower case with registration).
- Use macOS Internet Recovery to boot your Mac. Instructions here - How to Start Up a Mac in Internet Recovery Mode. Once it connects to the internet and boots into recovery, you can access Disk Utility from it. Use the Disk Utility to format the new drive. Then you can use your bootable flash drive to install macOS Catalina to the new drive.
In today’s technology, if you buy a USB hard drive, you can just simply use it directly using your Mac. However, there are instances that not unless that your flash drive is build to use for your Mac, you will not be able to format it.
Why is this so? The answer to this is because most of the computers actually run on Windows and they actually use a different file format which is known to be the Fat32.
Those drives that are formatted in Fat32 can be used in your Mac for reading and writing but there might be an instance that you might experience some trouble once that you use your macOS native format.
The top 5 disk formatting tools for Windows and Mac can help you securely format hard drive or external device under Windows/Mac OS. AweEraser is the outstanding one among the 5 disk formatting tools. It will securely format the hard drive and permanently erase the data. Then your hard drive is able to donated, resold, lent, or abandoned.
So, in case that you have a flash drive that is formatted into Fat32 or any type of format rather than having a Mac OS Extended or AFPS, then we are going to show you in this article how you could possibly format your flash drive using your Mac.
Part 1: How To Format Flash Drive On Mac
Here are the steps that you need to follow. Do these steps and you will then be able to format your flash drive on your Mac.
Step 1 Connect the external hard drive you want to format to your Mac, then start the Disk Utility app that you can find under Applications - Utilities. Step 2 On the left side of the Utilities screen, find the name of the external hard drive you want to format and select it. Format an External Disk or Flash Drive for Mac in Maverics Now type a new name for the Volume and select the format type as Mac OS Extended (Journaled). Now click the “Erase” button and confirm again on the next pop-up window to format the External Disk or a Flash Drive for Mac.
Step 1: Go ahead and plug in your flash drive in the USB port on your Mac.
Step 2: After that, go ahead and launch the Finder and click on your flash drive detected by your Mac.
Step 3: See to it that there are no files saved on your flash drive that you no longer need. This is because formatting your flash drive will remove all the data that is stored in it. If there are some files that you want to remain, simply copy these files to your Mac.
Step 4: After getting all the files that you need from your flash drive, go ahead and click on “Applications” and then click “Utilities” and then choose “Disk Utility”.
Step 5: And then, go ahead and click on your flash drive from the sidebar.
Step 6: Once that you have chosen your flash drive, go ahead and click on the “Erase” button located at the toolbar at the top of the window.
Step 7: On the next window that will appear on your screen, go ahead and key in a name for the flash drive that you are formatting from the box next to the “Name” option.
Step 8: And then select a format that you want from the drop-down menu.
Step 9: No, if you have previously stored a data on your flash drive that is highly sensitive, just go ahead and click on the Security Tab.
Step 10: From the security tab, go ahead and choose the level of the security that you want. The more that you move to your right, then the more “passes” the deleted tool will be but it will securely delete your files. However, doing to so will take more of your time to format your flash drive.
Step 11: After that, go ahead and click on the “OK” button and then click on the “Erase” button.
Part 2: Choosing the Right Format
There are formats that you need to choose from depending on the Mac that you are using. If you are using the macOS Sierra or a later version, then you have to options to choose from. One is the AFPS and the other one is the Mac OS Extended. The question now here is that which one should you choose.
You have to keep in mind that once you have formatted your flash drive into AFPS, then those Macs that are running on macOS that is older than the High Sierra will not be able to recognize it.
So, if you would want to use your flash drive on Macs that are running on High Sierra, then you have to choose the Mac OS Extended format.
However, you also have to know that AFPS is actually optimized for SSD or “solid state drive” and it includes flash drives.
That is why if you are going to reformat a flash drive on your Mac, then you should definitely choose the AFPS format as it is known to be the most reliable and faster than the Mac OS Extended. But again, that is if you do not have any plans in using it on a pre-High Sierra course.
And lastly, if in case that you would want to use your flash drive as one of your backup options in Time Machine, then you should definitely have it formatted in Mac OS Extended.
This is because Time Machine does not have the ability yet to backup flash drives that are formatted in AFPS. So, if you are using an AFPS formatted flash drive on Time Machine, it will just ask you to format your flash drive into Mac OS Extended.
Part 3: How To Format Flash Drive To Fat32 On Your Mac
Once that you have a flash drive, then what you would need to do is to have it formatted into Fat32. Why? This is because once that you have formatted your flash drive into Fat32, then you will be able to use it on both Windows and Mac PC when you want to save or transfer files with either of the two.
The Fat32 format can be used – read or write – with both Mac and Windows PC and because of this, it makes the device more versatile.
However, there are some limitations that you should need to know such as an individual file should only have a maximum size of 4GB. But do not worry because there is still something you can do about it and that is by formatting it to exFAT.
The exFAT format will not give any limitations on the file size that you are going to store on your flash drive and you can still use it on both Windows and Macs that are running in Mac OS X Snow Leopard or later version. For you to be able to format your flash drive into Fat32, here is what you need to do.
Step 1: Go ahead and connect your flash drive to your Mac.
Step 2: And then, go to Application and then click on Utilities.
Step 3: After that, go ahead and launch Disk Utility.
Step 4: And then, go ahead and click on your flash drive located at the sidebar in Disk Utility.
Step 5: After that, click on 'Erase' in the Disk Utility window.
Step 6: After that, go ahead and enter the name for the flash drive that you formatted.
Step 7: And then, choose the Format menu and then select MS-DOS (FAT32) or the ExFAT.
Step 8: After that, go ahead and click on the 'Erase' button.
Once that you are done with the provided steps for you, your flash drive will then completely wipe out all the data stored and it is re-formatted into either an ExFAT or FAT32 depending on what you have chosen on the previous steps.
Part 4: Getting Your Mac System Run Fast
Now that you have known with how you can format your flash drive on your Mac, now it is time for you to get your Mac cleaned up.
Getting your Mac clean on a regular basis after doing tasks can help your Mac maintain its speed and will also give you more space for your storage.
There is one great option for you to clean up your Mac in no time and this is by using the software called the FoneDog Mac Cleaner.
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The FoneDog Mac Cleaner will help you to speed up your Mac with just a few simple clicks. This software can also help you in scanning your Mac faster and find all of your junk files on your Mac.
It also has the capability of checking your Mac's system status which includes your CPU status, your memory usage and more. This way, you will have an idea of what is the data that is actually eating up a lot of storage space on your Mac and which is causing it to perform slower than the usual.
The FoneDog Mac Cleaner will not only help you in removing all of the junk files that you have on your Mac. It can also help you to completely uninstall applications that you no longer use together with all the files that are associated with that app. It can also serve as a Similar Image Finder, an Extension Manager, a Duplicate Finder, and more.
For you to start cleaning up your Mac, all you have to do is to follow all the steps that we are going to provide to you. Do not worry, this is really simple and easy to follow and it will not consume a lot of your time. In addition, the screenshots below are shown under the dark mode on Mac.
Step 1: Download and Install
Have the FoneDog Mac Cleaner downloaded from our official website at https://www.fonedog.com/mac-cleaner/. Once that you have completely downloaded the program, go ahead and have the program installed on your Mac.
Step 2: Launch the Program
After that installation process is complete, go ahead and run the program on your Mac. Once that the program is up and running, you will be able to see on your screen the system status of your Mac. With that information, you will have an idea which files are taking up a lot of space on your Mac.
Step 3: Select Cleaner
Cleaner provides you with the cleaning function for the system, photo, email, files, apps and other fields on your Mac.
Step 4: Choose iTunes Junk
Here, take iTunes Junk as an example to show you how to clean junks on your Mac to make your Mac run faster.
Note: As for the other tools like 'System Junk' and 'Email Junk', the steps to clean up them is the same as that in 'iTunes Junk' tool.
Step 5. Scan iTunes Files
After clicking into the page of iTunes Junk, press the Scan button to start scan all the iTunes backups, Cache, updates and downloads on your Mac.
Step 6: Review and Select Items
After that scanning process is completely done, you will be able to see on the left side of your window screen a list of category folders of all the junk files of iTunes that you have on your Mac. If you click each folder, you will see on the right side of your screen all the items that each folder contains.
Review each item on each folder for you to make sure that all the junk files shown on your screen are unnecessary any more.
Once that you are satisfied with the result, you can go ahead and simply click on the 'Clean' button to clean up all your junk files.
Step 7: Confirm Your Choice
There would be a pop-up window called Confirmation turning up. Please press the 'Confirm' button if you are sure to delete the selected files; otherwise, please press the Cancel button and return to the previous page.
Step 8: Cleaning Done
Once that the cleaning process is done, all those unnecessary files that you have there will all be deleted from your Mac.
Part 5: Conclusion
Now, as you can see, formatting your flash drive on your Mac is a very easy thing to do. All you need to have is the knowledge on how you can do.
And keep in mind that if you are going to format your flash drive, make sure that you choose the right format so that you can use it in any PC.
Formatting is easy, just like in cleaning up your Mac. Getting your Mac tidy is one of the best things that you should do for you to be able to maintain the speed of your Mac and of course for you to get more space on your storage. And the best way for you to clean up your Mac is by using the FoneDog Mac Cleaner.
All external USB disks can be formatted to work on Mac OSX, but not always straight out of the box.
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.
Disk Utility
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).
Best Disk Format For Mac
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:
Format Mac Disk In Windows
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:
Format Flash Disk Mac Os X
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:
Mac Os Format Usb Drive
And there you have it one formatted disk ready to go.