Did you know you can re-format an SD card using the Mac operating system? Even if the SD card has been used in other devices (such as a digital camera or MP3 player), you can still reformat it using the Mac OS. You can reformat an SD card using either the Windows standard format, FAT, or the Macintosh standard format, Mac OS Extended. Note: if you use Mac OS Extended, you will not be able to use your SD card in peripheral devices, and it will only be compatible with Apple computers.
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Difficulty:
Moderately Easy
Instructions
1
Insert the SD card into your computer's SD card slot or SD card adapter. Mac OS should recognize it automatically.
2
Open the Disk Utility application and select your SD card. Then select "Erase" from the submenu. Then choose either "FAT" Or "Mac OS Extended" from the re-format menu.
3
Wait several minutes for the format process to complete. Once it is finished, a notification will pop up. You can now store files on the memory card from your Mac or an external device (if it was formatted in FAT).
Tips & Warnings
If you want to store bootable files on the SD card, you must format the SD card using the Mac OS Extended format.
