How to Format SD Card on Mac (3 Simple Ways + Tips)

SD cards are the unsung heroes of digital photography. If your SD fails, you can have the most expensive camera in the world, but your photoshoot still won’t happen.

Things get even worse if the memory card fails after the shooting, causing you to lose your precious (and often once-in-a-lifetime) photos.

That’s why keeping your SD cards properly formatted is important, and it’s so easy that there’s no reason to avoid it.

Regularly formatting your SD cards helps maintain performance, prevents file corruption, and reduces the risk of camera errors.

It’s also a useful step to take if you’re giving away your old memory cards, as you can make sure that none of your files are still there for others to access. And by the way, if you’re looking for a new memory card, you might want to check out our article about the best SD cards.

Ideally, you should format your SD card in the device you’re using it with. Most cameras have a built-in function somewhere in the menu. You can check your user manual or simply Google the camera model to find out where you can find this feature.

Whenever it’s not possible to format the SD card in the camera, using your Mac computer is the next best thing. The process is easy and straightforward, even if you’re a complete beginner.

In this updated guide, I’ll show you three simple ways to format a Mac computer.

I’ll start with the easiest way, which is also completely reliable.

Plus, I’ll also show you how to do it using the Terminal as an alternative, and by using a free third-party software.

Note: Formatting your SD card will erase everything that’s on it. Make sure to copy and save any important data before formatting.

So, let’s get your SD card clean, optimized, and ready for your next photoshoot.

To quickly format an SD or MicroSD card on a Mac, follow these steps:

1. Insert your SD card into your Mac using its SD card slot or an SD card reader.
2. Navigate to the Disk Utility app via Spotlight (by typing “Disk Utility” into the search box). Alternatively, you can find it in the Utilities folder inside the Mac Applications folder.
3. Open Disk Utility.
4. Select your SD card.
5. Navigate to the top menu bar and click Erase.
6. Choose the appropriate file system format. (EXFAT for SD cards over 64GB; MS-DOS FAT if it’s 32GB or smaller.)
7. Click Erase.

Here’s our ultimate guide to formatting memory cards.

How to Format SD Card on Mac Using Disk Utility

If you found the short bullet point instructions above difficult to follow, here’s the in-depth explanation with how-to images.

Whether you’re using a MacBook Air, a MacBook Pro, or an iMac, you’ll surely have an app called Disk Utility. This app helps you format all sorts of drives (hard drives, USB memory sticks, SD memory cards, etc.)

This is how you can format your SD card using Disk Utility.

1. Connect the SD Card to your Mac 

To format an SD card on a Mac, connect the card to the computer. Older models have SD card ports that allow you to insert the memory card directly into the slot.

However, most newer models don’t come with this port. If this is your case, you’ll need to buy a USB card reader in order to connect your SD card to your computer.

• How to Edit Pictures on Mac for Free

2. Open Disk Utility

The Disk Utility app comes with macOS by default, so you don’t need to install anything. There are a couple of different ways to reach it:

The quickest way is to press Command + the Space Bar to open the Spotlight finder.

Here, type “Disk Utility” and press Enter.

You can also launch Spotlight by clicking on the magnifying glass icon at the top right of your screen.

The other way to access Disk Utility is to navigate to it directly via Applications > Utilities > Disk Utility.

3. Select your SD Card

Once you’re in Disk Utility, you’ll find all drives on the left sidebar. At the top, there’s your Mac’s internal drive. Underneath, you’ll find any external drives currently connected to the computer.

If you don’t see the full device list, click the drop-down menu called “View” next to Disk Utility and select Show All Devices.

It’s doubly important to make sure you select the correct drive at this stage, as you don’t want to accidentally format (and erase!!) anything else.

Your SD card will probably be listed as “UNTITLED” or “NO NAME” if it’s brand new or you’ve never given it a name.

You can make sure you’re clicking on the SD card by checking to see that:

1. The words “Secure Digital” (which is what SD stands for) are under the name. This is just an extra security step. If you don’t see them, it doesn’t mean that the driver is necessarily the wrong one. In my example, there’s no mention of Secure Digital.
2. The storage capacity on the right-hand side of the screen is accurate. (Here it says 15.92 GB, which is correct.)

4. Click on the Erase Button

Once the SD card is selected, click on the Erase button at the top.

WARNING: Proceeding with this process will effectively delete all the data from the card. So, remember to save elsewhere any important information before formatting.

Click on Erase to start formatting your SD card on a Mac.

5. Choose the SD Card Name

At this point, you’ll get a pop-up window. Here you’ll be prompted to change the name, which is purely optional. The card will work just fine as “NO-NAME” or “UNTITLED”.

That being said, it’s often helpful to have a user-friendly name that will distinguish your SD card from other drives or cards.

I like to choose the name of the camera that the SD card will be used with. Another option is to name it after the project (or trip) you’re going to do next, provided you already know what it is.

6. Choose the FileSystem Format

While choosing a name doesn’t necessarily change the card’s performance, selecting the file format is key.

Often, it will be set to Mac OS Extended (Journaled) as the default. Beware of using this format, as it won’t work with a digital camera or drone.

You’ll see a few different file systems listed in the Format drop-down menu. For SD cards and microSD cards, you’ll want to choose either ExFat or MS-DOS (Fat).

Select ExFat if your SD card is 64GB or larger. Choose MS-DOS (Fat) if it’s 32GB or smaller.

Note: If your SD card has been pre-formatted, it might have a grayed-out option labelled “MS-DOS (Fat32)”. MS-DOS (Fat) is the same thing, so if you need FAT32, use MS-DOS (Fat). 

7. Click Erase

Now you’re ready to go. Once you click Erase, Disk Utility will erase all data on the card, format it with the appropriate file system, and restore all available storage to its optimal capacity.

When these steps are carefully followed, you will have successfully reformatted your SD card on a Mac.

How do I format my SD card to FAT32 on a Mac?

To format your SD card to FAT32 on a Mac, follow the instructions above.

When you reach the last step (the Erase pop-up window), open the Format drop-down menu and select MS-DOS (FAT).

You can also use the free SD memory card formatter app or the Command Line in Terminal. (Both described below).

Free SD Card Formatter for Mac

Some people might prefer to use a dedicated program or app to format their SD on a Mac. There are a number of reasons why you could prefer this option, for example, if you’re worried about accidentally erasing the wrong drive.

If this is your case, you can use a free SD formatter app provided by the SD Association. This will remove all the guesswork out of the process and make it easier to format a memory card on a Mac.

The free SD Card Formatter ignores non-SD cards, and automatically detects which file system your card needs. It also optimizes the card’s performance and restores everything to SDXC specifications.

Another reason you may prefer the SD Card Formatter is that you can choose between Overwrite Format and Quick Format. The latter allows you to still retrieve your data after formatting the SD card using recovery software.

The entire process happens in a single screen where you can choose the type of formatting you want (Quick or Overwrite). You can also rename your SD card using the Volume Label option.

Using Mac Command Line to Format SD Cards

If you’re comfortable using MacOS Terminal, you can also use this option to quickly format SD cards. The downside to this method is that it’s easy to erase the wrong SD card if you’re not familiar with the terms. So, be very careful!

Make sure you can recognize which disk you’re looking at when you see volume identifiers such as disk2.

If you feel confident, this is how you can format an SD card using Terminal.

• Open Terminal. (Use Spotlight search or find it in the Utilities folder.)
• Connect your SD card to your Mac, and type $ diskutil list

This will list the available drives on your system.

• Find and select the SD card you want to format. (Make sure you’re positive which drive it is!)
• To format your SD card but keep the same file system, use the reformat command: $ diskutil reformat disk2

(In this case, disk2 is the SD card.)

• To format your SD card and change the file system, use the following command: sudo diskutil eraseDisk FAT32 MBRFormat /dev/disk2

Note: This is how to clear an SD card on Mac via command line! Be sure to back up your files.

Here, FAT32 is the chosen format; MBRFormat tells disk utility to format with a Master Boot Record; and dev/disk2 is the location of the SD card.

• Press Enter.
• Once the process is complete, type in “diskutil list” again to make sure the card was successfully formatted.

A Few Things to Note

• If you’re using a MacOS older than version 10.6.6 (Snow Leopard), it won’t support exFAT.
• SD cards have a slide switch that can be used to protect data from accidental overwriting. If you get an “operation failed” notice in Disk Utility or “Cannot format write-protected card” in the SD Card Formatter app, check to see if the little switch on your SD card is set to “Read-only”.
• Again, be extra, extra careful when selecting your SD card in either Disk Utility, and especially in Terminal.

Remember, formatting your SD card on a Mac is not ideal; it’s generally best to format them in the camera or device you’ll be using.

However, if you need to use your Mac, now you know how to do it! As you’re an Apple user, check out our guide to the best photo editing software for Macs.

If you have any questions, leave them in the comments, and best of luck formatting your SD cards.