Writing a disk image to a flash drive/SD card from OSX

alternative.md

Or, just install hypriot/flash and run:

$ flash /path/to/img

It also prints a pretty progress bar for dd, which is incredibly useful.

osx-write-img-to-disk.md

1. List devices

   $ diskutil list
   

2. Unmount the one you want to write to

   $ diskutil unmountDisk /dev/disk<n>
   

3. Write the image

   $ sudo dd if=/path/to/img of=/dev/disk<n> bs=1m
   

   • if - input file
   • of - output file
   • bs - input/output block size

4. Eject the disk

   $ diskutil eject /dev/disk<n>