EarMaster is available as:
Instant download for Windows and Mac OSX
instant serial delivery by email upon payment - No shipping fee!
Box edition for WIndows and Mac OSX
with printed manual (Pro & Teacher) or Quickstart guide (Essential). Shipping is a flat fee of €7/$10
EarMaster works with Windows (10/8.1/8/7/Vista/XP) and Mac OS X (10.6 or newer)