To do Alt + H V W on Mac in Excel, download and install Accelerator Keys, then press Option, followed by H, V, W.
Command: Paste Keep Source Column Widths
This is how to do Alt + H V W 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 V W paste Keep Source Column Widths pastes content and adjusts destination columns to match source column widths. This preserves the layout of your copied data.