EZDrummer in Logic Pro X

create a software instrument track

in the Inspector click the INSTRUMENT slot, a drop down menu will appear

scroll down to AU INSTRUMENTS, then Toontrack, then EZ Drummer

Hope that helps!

I'm not in front of Logic at the moment, but it's under something like AU (or is it AI instruments...dunno) instruments/Toontracks/EZdrummer, at the very bottom of the list of instruments. Anyway, it's there. Hope you find it. Love EZ Drummer.