Macintosh HDD:~ admin$ diskutil list/dev/disk0 (internal, physical): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *251.0 GB disk0 1: EFI EFI 209.7 MB disk0s1 2: Apple_HFS Macintosh HD 250.1 GB disk0s2 3: Apple_Boot Recovery HD 650.0 MB disk0s3/dev/disk1 (internal, physical): #: TYPE NAME SIZE IDENTIFIER 0: FDisk_partition_scheme *8.1 GB disk1 1: FreeBSD 2.0 GB disk1s1 2: FreeBSD 2.0 GB disk1s2 3: FreeBSD 52.6 MB disk1s3/dev/disk2 (external, physical): #: TYPE NAME SIZE IDENTIFIER 0: FDisk_partition_scheme *7.9 GB disk2 1: FreeBSD 2.0 GB disk2s1 2: FreeBSD 2.0 GB disk2s2 3: FreeBSD 52.6 MB disk2s3Macintosh HDD:~ admin$ sudo dd if=/dev/disk2 of=/dev/disk1