Duplicate a bootable USB drive?
 

1) If I have a USB stick which has been designed to be bootable, and I want to backup said USB stick onto another USB stick, can I use SuperDuper and end up with another bootable USB stick?

Any special instructions that I ought to know about?


2) Same question, but assume I want to back the USB stick up to a DMG or ISO or whatever. Can I use SD! or do I need a different program?

1) You just have to make sure the other stick is also properly partitioned for the Mac (as GUID, given it's USB). Otherwise, treat as normal.

2) You can certainly make a sparse image file from it, as you can with any other. ISO, no.