Does this mixer support 64bit OS?

Yes, it does, but Windows XP 64bit is not supported. The driver software and Serato DJ support the versions of OS shown below.

If you want to use other DJ software than Serato DJ, the DJ software should be 32bit application and support 64bit OS. Please ask DJ software manufacturer for further details.

Driver

-Windows

　Windows XP　32bit

　Windws Vista 32bit/64bit

　Windows 7　　32bit/64bit

　Windows 8　 32bit/64bit

-Mac

　Mac OS X 10.8/10.7/10.6 32bit/64bit

For details, see [the AlphaTheta support page].

Serato DJ

-Windows

　Windows 7 32bit/64bit

-Mac

　Mac OS X 10.8/10.7/10.6 32bit/64bit

For details, see the AlphaTheta support page.