Generating series of map for each field of attribute table in QGIS?

Using QGIS 2.8, I have a shapefile with more than 30 columns (or fields) in the attribute table. I would like to automate the creation of one map for each of them.

I gathered that the QGIS Atlas generator can do that by "line" of the field, how to do that by column?

I found Generate series of maps with Python script, but I am on MacOS ...