on a mac the SU material folders can only go 'one' level deep...
[image: vxsV_2015-08-1112.48.04pm.png]
renaming each folder with the Product name helps find what you need in SU...
but you do get a long dropdown menu...
[image: wRxf_mats.gif]
I use my Add_Icon plugin 'batch mode' to add 'quicklook' icons for Finder...
john