Apple Mac Help

Quick question. I’m not a Mac user but am curious. If I have a piece trait “Does Not Stack” and set the “Select Piece” property to “when alt-key down”, what do Mac user use?

Thanks!

The Option key. Just about any Mac made within the last several years should in fact have “Alt” on this key already (both my iMac from 2009 and my Macbook Air from 2014 do):

Thanks!

Some keyboards have “alt” + “option” (like US layout), and some have “alt” + “⌥” (like Int. English layout).