If you need to prepare a USB drive for an MCU update, follow these simple steps using your Mac computer:
Open Disk Utility: Click on the magnifying glass icon in the top-right corner of your screen, type "Disk Utility," and press Enter to open the application.
Select Your USB Drive: Find the USB drive you want to format in the list on the left side of the Disk Utility window. Click on it to select it.
Click on "Erase": Look at the top right corner of the window and click on the "Erase" button.
Choose the Format: In the window that appears, find the "Format" dropdown menu and select "MS-DOS (FAT 32)."
Start the Formatting Process: Click the "Erase" button at the bottom right corner of the window. The formatting process will start, and it may take a few moments.
Complete the Process: When the formatting is finished, click "Done." Your USB drive is now formatted and ready to be used for "Step 1" of the MCU update process on your camera.