To do Alt + H C C on Mac in Excel, download and install Accelerator Keys, then press Option, followed by H, C, C.
Command: Copy
This is how to do Alt + H C 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 + H C C copy places the selected cells on the clipboard. You can then paste the content elsewhere using Paste or Paste Special options.