Yeah!!! Thank you John.
That brought me to my materials folders for both my earlier versions of sketchup.
They were located in the sketchup.app. not in the application support folder as noted in other threads.
For anyone else looking for these folders. Use the ruby code john provided or:
On a mac OSX, go to the application folder, right click the sketchup version you wish to retrieve the textures from and select show package contents (this is the step I’ve been missing for years), then follow the path,
Contents/Resources/Content/Materials
Thanks again for your help!