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Download key generator for Nik Software Collection 64bit Plugins

ColorEfex 3.110

Dfine 2.107

HDEREfexPro 1.000

SharpenerPro 3.005

SilverEfexPro 1.007

Viveza2 2.003

All with serials.

I have tested SilverEfex, Define and ColorEfex with Photoshop CS5 on Mac and it all works fine in 64bit. The others I can only assume will work too but I have not tested them.

Enjoy!