Shoc, you're one of the first I've seen with this new adapter that is not getting it to work. Have you done a complete uninstall on all your ATI drivers, and downloaded and installed all the latest 10.9's since removing the DP to VGA adapter? You have the same adapter shown in the original post, with no USB cables, correct? What video card are you using specifically?
I have tried 10.4/10.5/10.9 and also removed them using DriverSweeper. along with the displayport being used on it's own, obviously you can imagine 3x screens at 1900x600 is not nice :shock:
the adapter is exactly that shown, the source I purchased it from told me they had many recalls on the items, but I'm seriously thinking its my GPU and I had a DP-VGA with the same issue, only difference is Sapphire notices a problem and restricts me so I dont get a flicker
checking iin CCC it notices its connected via a DP and reports max resolution supported via monitor is 1920x1080 but restricts me due to a "fault"
Only thing I could ever point a finger at is, Windows would report my monitor as
1 3 2
[ ] [ ] [ ]
CCC would claim its something like (IDENTIFY MONITORS)
2 1 3
[ ] [ ] [ ]
the only thing I notice wrong otherwise im totally lost either 2 faulty adapter (yes they are slightly different) or my gpu is at fault, over a month on this problem starting to regret not using Nvidia