Superior Drummer is available as a 64-bit VST for both PC and Mac, as well as a universal binary (PPC, Intel 32-bit and Intel 64-bit in one executable) Audio Unit for Mac.
A 64 bit AAX version of Superior Drummer 2 is available for Pro tools 11 and higher.
Note that there is no specific support for 32 bit host applications operating under a 64 bit operating system, nor can we make any guarantee in term of stability and feature availability when operated through dedicated memory addressing translation solutions commonly known as ‘bit-bridge technology’.
Productivity and data loss may occur in non supported environments and you therefore use your Toontrack product at your own risk in all of the above stated ‘hybrid’ scenarios.