Backup Raspberry Pi SD on your Mac… and restore.

Plug the SD in your Mac.

In the Terminal, as root, use diskutil to identify your SD.
Generally it’s the last in the list, if you’ve just plugged in.

root:~ # diskutil list

You will see something like this:

In my case, the SD is /dev/disk4. For this reason, I run the following to unmount the whole disk.

root:~ # diskutil umountDisk /dev/disk4
Unmount of all volumes on disk4 was successful

Once done, you can create the backup using dd utility, but make sure to change the device from /dev/diskX to /dev/rdiskX, adding the “r“.

root:~ # dd if=/dev/<span style="color: #ff0000;">rdisk4</span> of=/path/to/mypibackup.img bs=1m

To restore, of course… invert if (input file) with of (output file)… 🙂

root:~ # dd if=/path/to/mypibackup.img of=/dev/rdisk4 bs=1m