Mac OS X

In Terminal on Mac OS X

1. Format the card (eg with SDFormatter)

2. Find the partition

  diskutil list

In the example output below, note that the SD card is /dev/disk3

/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:          Apple_CoreStorage                         999.7 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
/dev/disk1
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                  Apple_HFS Macintosh HD           *999.3 GB   disk1
                                 Logical Volume on disk0s2
                                 91176DA2-8F84-43E4-9434-201380E579DE
                                 Unencrypted
/dev/disk2
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *2.0 TB     disk2
   1:                        EFI EFI                     209.7 MB   disk2s1
   2:                  Apple_HFS My Passport             2.0 TB     disk2s2
/dev/disk3
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     FDisk_partition_scheme                        *16.0 GB    disk3
   1:             Windows_FAT_32 RASPBIAN                16.0 GB    disk3s1
/dev/disk4
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     Apple_partition_scheme                        *17.4 MB    disk4
   1:        Apple_partition_map                         32.3 KB    disk4s1
   2:                  Apple_HFS Flash Player            17.4 MB    disk4s2

3. Unmount the card

 diskutil unmountDisk /dev/disk3

4. Copy the image

 sudo dd bs=1m if=/Users/norris/iot/rpi/2015-11-21-raspbian-jessie.img of=/dev/rdisk3