#Local class on using excel on mac install
Unlike COM add-ins, Excel add-ins do not require you to install any code on a user's device, or within Excel.
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Provide richer interaction using dialog window.Add custom ribbon buttons or contextual menu items.Extend functionality using web based task pane or content pane.Interact with Excel objects, read and write Excel data.An Excel add-in allows you to extend Excel application functionality across multiple platforms including Windows, Mac, iPad, and in a browser.