If you have an SD or micro SD card you want to reformat with your Mac it’s a pretty easy process. Read on to learn how.

Before you start, you need to mount the SD or micro SD card on your Mac. If you have a Mac with an SD card slot, use that. If not, you’ll need an SD card adapter like the Anker 8-in-1 card reader. It’s a good deal at US$9.99 on Amazon.

To reformat an SD or micro SD card on your Mac, do this:

  • Launch Disk Utility. It’s in Utilities folder inside the Applications folder.
  • Find and select your SD card in the column on the left
  • Click the Erase tab
Apple Disk Utility on the Mac

Use the Erase tab in Apple’s Disk Utility app to reformat SD cards

  • Choose the format you want from the pop-up menu
  • Click Erase
Disk Utility app on the Mac showing SD card format options

MS-DOS (FAT32) isn’t a formatting option in Disk Utility for 32 GB and smaller SD cards

Disk Utility won’t let you format 32 GB and smaller SD and micro SD cards as MS-DOS (FAT32). You can see the option, but it’s grayed out. That’s because exFAT is the format you should use instead.

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