VSL Special Edition Bundle Vol.1, Orchestra Library, includes Special Edition Vol. 1 - Essential Orchestra, includes Special Edition Vol. 1 PLUS (extended articulations, corresponding to Vol. 1), Sample Player "Vienna Instrument" included, intelligent detection of your performance, eLicenser (VSL, Steinberg, Syncrosoft) required for product activation (not included), content: software license plus Media-Pack (USB stick including all installation files), Windows 7 or higher, Mac OSX 10.7 or higher, Formats: Stand-Alone, AU/VST/AAX Native/RTAS (requires Pro Tools 7.3 or higher)