Which technology is most suitable to develop Add-In for MS Excel

Question

I need to develop an Add-In for Microsoft Excel and that will run on all operating systems and I need a strong collection set like (Datatable, Sorted list in C#).

Initially, I have developed one VSTO Add-In by using C#, but it is not running on MAC OS because MAC does not have COM technology.

Answer 1

The only Addin technology that works across a wide variety of end-points and operating systems is Office Addins, using Javascript, CSS and HTML.

See my blog post here for an overview of all the current Excel addin technologies. https://fastexcel.wordpress.com/2017/03/13/excel-javascript-api-part-1-overview-comparison/