When your model gets to big for the free add-in contact us about upgrading. Over 100,000 existing “cloud Solver” users will receive the new version automatically. Users can obtain Solver immediately from Microsoft AppSource. Get the new Solver App for Excel 2016 and Excel Online this free Solver app works equally well in desktop Excel 2016 and Excel Online – and handles the smallest to the largest, most challenging optimization models. Mac Users Using Excel 2016 or Excel Online Ask Question Asked 3 years, 2 months ago. It is not available for the Mac, but you can use Solver for Excel 2011 for Mac to open and solve models in workbooks created with Premium Solver for Education. Premium Solver for Education is a compatible upgrade for the standard Excel Solver for Windows that has been bundled with more than 35 textbooks, often used in MBA programs.