[Why POSEIDON Z (KB-PIZ) cannot use on MAC OSX ?]

This is sad. You have great products but clearly don't care about your users on this one. Going to return this product and buy a competitors. Your other keyboards have worked great before. And clearly you do not notice the growing mac community. There has been plenty of time for a solution. You have issued firmware for the RGB so i know you can do it but don't care to. Just sad. Returning product for my money back and i will never buy a product from you again.