*** ALERT ***
It appears now that the previous link for the $5 specials is still using the old PHYSICAL package BUT the makers have changed the insides...
If you run Apples Audio MIDI Setup, you'll see any MIDI interfaces you have (or had) connected in the MIDI panel:
On the right hand side is the "NEW" interface, labeled USB2.0 and shows TWO ports going out, only ONE coming in. I can no way get this thing to send anything on either port. It will receive fine, but not send. Thus, it's a piece of junk.
When I contacted the eBay seller, they said it was not SYSEX capable and their listing showed that. Which it didn't. Surprise...
If you can get your money back from Amazon, eBay or where ever you got it, do it.