I have good news to share. We are working to bring the Watch Window to Excel for Mac. You can try it now by opting into to the Insider program and choosing the Fast updates.
To opt into the Insider program, go to Help menu > Check for Updates. Then click the Advanced button, then opt in to Insider Fast. If you update to version 16.43 201013 or greater, you should see the Watch Window button on the Formula tab of the ribbon.
If you notice any problems or have any feedback, please click the feedback button in Excel and let us know about.
Steve [Excel for Mac team]
An error occurred while saving the commentAnonymous commented
YES, PLEASE ADD THE WATCH WINDOW OPTION IN MAC.