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Format a SD Card / USB Flash memory in Disk Utility on Mac

See instructions below on how to format a SD card or USB flash device.  We recommend using FAT32.

 

In Disk Utility on your Mac, you can format an external disk for a Windows computer.

WARNING: Formatting a disk or volume erases all the files on it. Save any files you need to another volume before formatting.

 

  1. In the Disk Utility app on your Mac, choose View > Show All Devices.

  2. In the sidebar, select the disk you want to format to use with Windows computers.

  3. Click the Erase button .

  4. Click the Scheme pop-up menu, then choose Master Boot Record.

  5. Click the Format pop-up menu, then choose one of the following:

    • MS-DOS (FAT32)

  6. Enter a name for the volume.

    The maximum length for the volume name is 11 characters.

  7. Click Erase, then click Done.