https://www.balena.io/blog/did-etcher-break-my-usb-sd-card
diskutil list
diskutil eraseDisk FAT32 UNTITLED MBRFormat /dev/disk3
dd if=/dev/zero of=/dev/xxx bs=512 count=1 conv=notrunc
https://www.balena.io/blog/did-etcher-break-my-usb-sd-card
diskutil list
diskutil eraseDisk FAT32 UNTITLED MBRFormat /dev/disk3
dd if=/dev/zero of=/dev/xxx bs=512 count=1 conv=notrunc