How can I force format read only usb drive in OSX
Check disk device with Disk Utility, then sudo diskutil unmountdisk force diskXXX sudo dd if=/dev/zero of=/dev/diskXXX bs=1024 count=1024
Check disk device with Disk Utility, then sudo diskutil unmountdisk force diskXXX sudo dd if=/dev/zero of=/dev/diskXXX bs=1024 count=1024