This feature doesn’t work well with MAC users in Windows 2008R2 due to the limitations below.
RemoteApp is an optional feature of Remote Desktop Services where users are not provided a desktop session but rather can only open a specified application. The Clients for MACs/Apple can be found here: (The Remote Desktop Connection Client is preloaded on all Windows machines and doesn’t require a download to use it). For remote desktop (terminal server) application hosting where the user is logging into a full desktop session, MAC users should have a good experience and there are Remote Desktop Connection Clients that can be downloaded for MACs, iphone, and ipad.