To do Alt + A F F on Mac in Excel, download and install Accelerator Keys, then press Option, followed by A, F, F.
Command: Flash Fill
This is how to do Alt + A F F 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 + A F F triggers Flash Fill, Excel’s intelligent pattern recognition feature. After you type an example of the pattern you want, Flash Fill automatically fills the rest of the column by recognizing and applying that pattern to your data.