How to Format a Micro Sd Card on Mac

Kyle Wood

Mac, Tutorials

If you have a micro SD card that needs formatting on your Mac, you’ve come to the right place! Formatting a micro SD card can be done quickly and easily using the built-in Disk Utility tool on your Mac. In this article, we will guide you through the steps to format a micro SD card on your Mac, ensuring it is ready for use.

Before You Begin

Before you start formatting your micro SD card, it’s important to note that formatting will erase all data on the card. So, if you have any important files or documents on it, make sure to back them up before proceeding with the formatting process. Once formatted, all data on the micro SD card will be permanently deleted.

Step 1: Insert Your Micro SD Card

The first step is to insert your micro SD card into the appropriate slot on your Mac. If your Mac doesn’t have a built-in SD card slot, you can use an external SD card reader. Once inserted, make sure your Mac recognizes the micro SD card.

Step 2: Open Disk Utility

To format your micro SD card, open “Disk Utility” on your Mac. You can find it by clicking on “Finder” in the Dock, then selecting “Applications” from the sidebar and navigating to “Utilities” and finally clicking on “Disk Utility”. Alternatively, you can use Spotlight Search (Command + Space) to search for “Disk Utility”.

Step 3: Select Your Micro SD Card

In Disk Utility, locate and select your micro SD card from the list of available drives and volumes. It should appear under the “External” section with its name or size displayed next to it.

Step 4: Erase Your Micro SD Card

With your micro SD card selected, click on the “Erase” button at the top of the Disk Utility window. A new window will appear with options for erasing the disk.

Note: Make sure you have selected the correct micro SD card, as erasing the wrong disk can result in permanent data loss.

Step 4.1: Choose a Name and Format

In the erase window, you can enter a name for your micro SD card in the “Name” field. Choose a descriptive name that will help you identify it later.

Next, select the desired format for your micro SD card. The most common format is “MS-DOS (FAT)”, which is compatible with both Mac and Windows computers. However, if you plan to use your micro SD card exclusively with Mac devices, you can choose “Mac OS Extended (Journaled)” for better compatibility and performance.2: Scheme (for macOS Extended Format)

If you selected “Mac OS Extended (Journaled)” as the format in the previous step, you will also see an option for selecting a scheme. For most users, it is recommended to leave this set to “GUID Partition Map”. This scheme works well for Intel-based Macs.

Step 5: Start Formatting

Once you have chosen a name and format (and scheme if applicable), click on the “Erase” button at the bottom right corner of the erase window to start formatting your micro SD card.

Note: Formatting may take some time depending on the size of your micro SD card and its current condition.

Step 6: Eject Your Micro SD Card

After the formatting process is complete, you can safely eject your micro SD card from your Mac. To do this, right-click on the micro SD card in Disk Utility or on the desktop, then select “Eject” from the context menu. Wait for the card to disappear from the desktop before physically removing it.


Formatting a micro SD card on your Mac is a straightforward process using Disk Utility. Remember to back up any important data before formatting, as it will be permanently erased. By following the steps outlined in this article, you can quickly and easily format your micro SD card and prepare it for use.

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