Originally Posted by brainbot1 View Post
I have one of those and it worked fine for years and then I did a firmware update one day and it stopped working. Supposedly apple greatly reduced the number of compatible DACs for "security purposes".
Is it a power consumption thing or a compatibility thing? Try a USB adapter that will put out more power 10+watts and see if that works. Mine doesn't work with a 5v 1amp source, it has to be 2amps or more to work.