Thinkpad T420 El Capitan - External Monitor does not work

Hi my configuration T420 Thinkpad:

Intel core i5 2520m
Graphic - Intel HD3000 + Nvidia NVS 4200M (off)
Laptop - Thinkpad T420
OS X - El Capitan 10.11.6

VGA port does not work, dvi on the dock does not work
Is it possible to run? Please help