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SD cards are the ultimate little lifesavers in extending the storage space on your smart devices. But, you’ll need to format an SD card on your Mac before you can use it.
We’ll take a look at the steps needed to do this, so you can get back to work. The steps are pretty simple, and require just your SD card and the Disk Utility app. Luckily, Disk Utility is already included with macOS.
These ultra-tiny flash memory cards are used primarily for extra iPhone and camera storage. It’s important to note that you will want to back up any of the files that are already on your SD card. After the formatting process is completed, the card will be completely wiped clean and the files will be deleted.
How to format an SD card on Mac
Once your SD or micro SD card has been backed up, you will be ready to format the storage device. Here are the steps to make it happen:
Insert the SD card into the slot on your Mac.
Navigate to Finder > Applications > Utilities.
Open Disk Utility.
In the sidebar, select the SD card that you are trying to format.
At the top of Disk Utility, press Erase.
After you have pressed the Erase button in Disk Utility, the app will ask you to rename the SD card. Do this, and then tap the Erase button in the bottom right-hand corner.
Additionally, there is a section that asks you which format you want the SD card to be formatted in. We recommend switching this format option to ExFAT if it’s not already selected.
From here, Disk Utility will work its magic and will format your SD card. Once it is completed, you will want to press the “Done” button in the bottom right-hand corner.
Now, you might be a bit excited to have this finished, but don’t just go pulling out the SD card yet. Instead, find the formatted card in the sidebar on the left and press the eject button. Doing so will ensure that something doesn’t get broken, which will usually need a reformat before the card will properly work again.
What if I don’t have an SD card slot?
After Apple decided to redesign the MacBook Pro lineup in 2016, this meant the death of the SD card slot. Most MacBook models previous to this iteration have the slot built into the side, but if not you’ll need an extra piece.
Depending on which version of the Mac you own, you will need to get a USB SD card reader. These are relatively inexpensive, again, depending on which model Mac you are trying to use this with.
What’s next?
After you have completed the steps above, your SD card will be wiped clean, and can then be used for any application that you seem fit. Whether that’s to use it in a digital camera, build a Raspberry Pi system, or any other project that you want to complete.
If you run into issues, let us know in the comments below, and we’ll be sure to help figure out what’s going on. This is a pretty straightforward process, but you’ll need to follow the steps correctly, as Disk Utility can also wipe other connected hard drives.
Andrew is a freelance writer based on the East Coast of the US.
He has written for a variety of sites over the years, including iMore, Android Central, Phandroid, and a few others. Now, he spends his days working for an HVAC company, while moonlighting as a freelance writer at night.
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What's the issue?
Format an SD card in your computer.
How to fix it? Click on your platform to show the formatting instructions for your SD card: Mac Windows 10
How To Format Sd Card
Mac
Here is a link that shows you how to reformat an SD card (or MicroSD card) on your Mac. The steps are also written out below.
Connect the SD card to your computer by using an external card reader. Save all the files from your SD card that you want to keep to your computer before moving to step 2. Formatting the SD card deletes all the data off of the card.
Note – If you’re using a Micro SD card, please insert the Micro SD card into the SD card adapter that came with card. Connect the SD card adapter to your computer by using an external card reader.
Also note – Mac OS 10.6.5 or earlier does not support exFAT format, which most 64 GB SD cards are formatted to. This means that you won't be able to format or use exFAT card on your computer. In this case, we'd recommend either upgrading your OS to 10.6.6 or later, or using an SD card that's already formatted to MS-DOS (FAT) or FAT32 to complete the below steps.
Open Disk Utility. To do this, click on the magnifying glass in the top-right corner of your computer screen. Type “disk utility” in the search box that opens, then click on the “Disk Utility” Application that comes up.
Find the SD card in the left side of the window. It’ll be named something like NO NAME or UNTITLED.
Click the ERASE tab in the middle of the window.
Next, click on the Format dropdown menu. Select MS-DOS (FAT) if the card is 32 GB or smaller. If it’s a 64GB card, please select ExFAT.
A message will appear asking, “Are you sure you want to erase the partition “[YOUR SD CARD NAME]?” Click Erase. The computer will delete the contents of your SD card and format it. You’re all done.
Windows 10
Step 1: Bring up Desktop View
If you are not already in Desktop View, bring up Desktop View by pressing the Windows key + D on your keyboard.
Step 2: Open 'Computer'
Open up the 'Computer' window by pressing Windows key + E on your keyboard.
Step 3: Display right-click options
Your SD card should be displayed in the 'Devices with Removable Storage' section. Right-click on your SD card to bring up the right-click menu options. Select Format.
Step 4: Format the SD card
In the Format window make sure that the correct File System is selected. It should be set to FAT32 for 32GB SD cards and EXFAT for 64GB SD cards.
Select Quick Format.
Click Start.
Once the formatting is complete, you can close the window.
Congratulations! You have formatted your SD card.
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