Universal Audio Apollo Twin High-Resolution Thunderbolt Interface with Realtime UAD DUO Processing Desktop 2x6 Thunderbolt audio interface with world-class 24-bit/192 kHz audio conversion Real time UAD Processing for tracking through vintage Compressors, EQs, Tape Machines, Mic Preamps, and Guitar Amp plug-ins with near-zero (sub-2ms) latency Unison technology offers stunning models of classic tube and transformer-based mic preamps Runs UAD Powered Plug-Ins via Audio Units, VST, RTAS & AAX 64 in all major DAWs Requires Mac OS X 10.8 Mountain Lion or 10.9 Mavericks