Home Forums Peripherals & Multimedia Peripherals external clone won't boot

I have also been able to use the latest version of SuperDuper! to backup/clone both of my machines running OS 10.11.1 to external devices (I make two such backups/clones for each machine to two separate external drives). Each of those external drives have Seagate mechanisms, and I have been directly connecting via Firewire 800 to my late 2012 Mac Mini, and connecting from the Firewire ports to a Thunderbolt-to-Firewire 800 adapter for my mid 2013 13" MacBook Air. The clones boot up fine (although the bootup process is certainly no speed demon!).