A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
I wasn't pointing you to the 2016 information so much because of 2016, but because El Capitan has file restrictions that earlier versions of Mac OS X don't have.
When it comes to using Macros in El Capitan we have to do trial and error to see what works and what doesn't. I don't know of a resource to point you to that has elaborate details about what to expect and how to go about updating file related macros. One thing to keep in mind is the length of the file path. Keep it short.