[dtm3dd]

"MacBook Pro (Retina, Late 2013) and Mac Pro (Late 2013) computers can use 4K displays and Ultra HD TVs with OS X or Windows (via Boot Camp)."

http://support.apple.com/kb/HT6008?viewlocale=en_US&locale=e...

[mjs]

(Note that according to that page, the MacBook will only do 30 Hz.)

[dtm3dd]

60 if display port is available (which it is on this Dell).