To do Alt + W F C on Mac in Excel, download and install Accelerator Keys, then press Option, followed by W, F, C.
Command: Freeze First Column
This is how to do Alt + W F C on Mac in Excel with Accelerator Keys, the native ribbon and alt key shortcut solution for Mac users who get more done with Excel.
Alt + W F C freeze First Column keeps the first column visible while you scroll horizontally. This is useful when the first column contains row labels.