You have installed OpenBSD on your MacBook but want to install on your USB drive for on the go usage. This procedure was tested using macOS Sierra. Installation is done using UEFI partition table and with full disk encryption. Note: The process may take much longer than the regular hard disk or VirtualBox install since we are writing to the disk directly from inside the VirtualBox. Before proceeding you will need A USB drive that can be formatted without worrying about the data Access to a machine with virtual box installed OpenBSD installer ISO file An optional USB wireless adapter.