NEW YORK--(BUSINESS WIRE)--Macquarie Capital, the corporate advisory, capital markets and principal investment arm of Macquarie Group, today announces the appointments of Sean McCarthy and Chris Holt as Managing Directors in its North American Telecommunications, Media and Technology (TMT) business. Messrs. McCarthy and Holt report to David Dorfman, a Senior Managing Director and Head of TMT and Services at Macquarie Capital for the Americas and Europe, and will be based in New York. Mr. McCart.