Control F also works on a Mac.
After you run a find, and the Find dialog is closed.
This is a handy way to step through matches without the find dialog blocking your view.
To do a find and replace, use Control + H on both Windows and Mac.
Excel will open up the Replace dialog with the replace field visible and in focus.
Here’s a couple more quick tips on Find and Replace.
Before you find, if you make a selection first, you automatically limit the search to that selection.