Creating a USB boot drive on Mac OSX 10.9 (Mavericks)

Created bootable USB boot drives numerous times prior. Attempted today and it looked like it was successful, but when console was booted off drive, it got caught in a text loop

www.youtube.com/watch?v=YgxESCPTGxo

The only thing I can think is that it's related to using OsX 10.9 (Mavericks). Haven't searched yet to see if its a Terminal or Unetbootin issue.

Tried in PC with LinuxLiveUSB and worked fine.

Anybody experience this or have any ideas/ workarounds/ solutions?