To do Alt + M Q W on Mac in Excel, download and install Accelerator Keys, then press Option, followed by M, Q, W.
Command: Web Functions Submenu
This is how to do Alt + M Q 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 + M Q W opens the Web functions submenu from More Functions. This category contains functions for working with web data, including WEBSERVICE for calling REST APIs and FILTERXML for parsing XML data returned from web services.