Follow these steps to install the Excel 365 on Mac / Excel Online add-in:
  • Go to Insert menu and click My Add-ins button
  • Click the Store button
  • Type “artemis” in the “Search” text box
  • Press Enter or click the Search button
  • When the Artemis Sheets add-in is displayed, click on the Add button
  • On the License Terms and Privacy Policy screen, click Continue
  • Artemis Sheets menu will then be added to Excel
  • Click on Show Taskpane button to show the Artemis Sheets sidebar and activate the add-in for the current workbook