I've tried the driver on Yosemite and it works. After upgrade to El Capitan it stopped working =(
Thermaltake company have to issue a driver for Mac OS X! Why we have so many troubles with the keyboard on OS X.
Maybe Thermaltake should make software to resolve the compatibility issue with os x?
I can't use above solution on my mac. When I enetered to terminal in boot mode I could only write in codes like \240\360\420\.