To do Alt + H A R on Mac in Excel, download and install Accelerator Keys, then press Option, followed by H, A, R.
Command: Align Right
This is how to do Alt + H A R 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 + H A R positions cell contents at the right edge of the cell. Right alignment is commonly used for numbers so decimal points line up.