I can import my large csv file into ArcGis Desktop and I can view it in Catalog and everything looks fine. When I go to 'create feature class' it does not recognize the column that I need to use for the z value. It is not an option I can pick.
I'm using ArcGIS 10.2 for Desktop and trying to do this in Catalog.
This is what I get when I try to make the XY shapefile. No Z options.