Making a bootable USB

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❯ diskutil list
/dev/disk0 (internal):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                         2.0 TB     disk0
   1:             Apple_APFS_ISC                         524.3 MB   disk0s1
   2:                 Apple_APFS Container disk3         2.0 TB     disk0s2
   3:        Apple_APFS_Recovery                         5.4 GB     disk0s3

/dev/disk3 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +2.0 TB     disk3
                                 Physical Store disk0s2
   1:                APFS Volume Macintosh HD            15.4 GB    disk3s1
   2:              APFS Snapshot com.apple.os.update-... 15.4 GB    disk3s1s1
   3:                APFS Volume Preboot                 528.3 MB   disk3s2
   4:                APFS Volume Recovery                827.3 MB   disk3s3
   5:                APFS Volume Data                    164.4 GB   disk3s5
   6:                APFS Volume VM                      2.1 GB     disk3s6

/dev/disk4 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        +2.4 GB     disk4
   1:                        EFI EFI                     209.7 MB   disk4s1
   2:                  Apple_HFS GoLand                  2.0 GB     disk4s2

/dev/disk5 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     FDisk_partition_scheme                        *15.5 GB    disk5
   1:                 DOS_FAT_32 ESD-USB                 15.5 GB    disk5s1

❯ diskutil unmountDisk /dev/disk5
Unmount of all volumes on disk5 was successful
❯ hdiutil convert pfSense-CE-memstick-2.6.0-RELEASE-amd64.img -format UDRW -o pfSense-CE-memstick-2.6.0-RELEASE-amd64.iso
Reading Master Boot Record (MBR : 0)…
Reading  (Type EF : 1)…
...............
Reading  (FreeBSD : 2)…
....................................................................................................................................................................................................
Reading  (DOS_FAT_32 : 3)…
.....................................................................................................................................................................................................
Elapsed Time: 402.701ms
Speed: 2.2GB/s
Savings: 0.0%
created: /Users/shermanrose/Downloads/pfSense-CE-memstick-2.6.0-RELEASE-amd64.iso.dmg
❯ sudo dd if=pfSense-CE-memstick-2.6.0-RELEASE-amd64.iso.dmg of=/dev/rdisk5 bs=1m
922+1 records in
922+1 records out
967746048 bytes transferred in 89.499613 secs (10812852 bytes/sec)
❯ diskutil eject /dev/disk5
Disk /dev/disk5 ejected