I wrote a simple plugin RB file several years ago to give MAC users a sorted material-name-list to choose from…
Now available as an RBZ - from the SketchUcation PluginStore v1.1
Mac setup is different, it just simply doesn’t allow for a list of all the material names like PC
Either you can use plug-ins
or
RIght click the material you want, right click, edit and then you can edit/see the name. However this just so you can see the name, one at a time, not great if you want to see them all.