may i know what keyboard  do you use for Mac and Linux?

From what i know, not many keyboard supported it.

For Leopold Mechanical Keyboard, based on some user did mention Leopold does not work on mac, but i tried on my friend's Mac and it did work without any problem. so, i guess you'll have to test first before you make the purchase.

have you ever tried update the USB Drivers? i'm quite worried that may be the problem, as you do read online reviews saying it supported linux, but it's not working on your linux.

You can try alternative solution before giving up on your keyboard unless it is confirm not supported by linux.

the keyboard uses the unofficial yellow switch right? the 1 without cherry logo 

Did you try with a USB to PS2 -> PS2 to USB converter?
It's a tad troublesome for this combination, but I figured it might work?

There are 2 devices.

USB to PS2
Ps2 to USB

Combine them both, and your keyboard might work

Hmm... this is kinda serious... even windows also not working....
How much you buy this Rapoo V7 keyboard???

It was cheaper last month from DinoDirect for RM160 shipped via DHL
Too bad for you unfortunate incompatibility.

Maybe you can consider buying the Ducky ALPS, this time ask storm88 if they work on Macs/Linux before committing.

the price is ok, just need buyer

Agreed, i'll add a FAQ list at first page.

For Gaming Grade Mechanical Keyboard, i don't think they are actually existed, since they are all marketing gimmicks. if you see membrane keyboard, alot of them claiming to be gaming grade keyboard, but it's only offering different design about it's "Ergonomic Design Keyboard" with good bling bling, while it doesn't offers or improve your gaming ability.

For Me, the only thing that's worth buying membrane keyboard for, are the Macro Function. but currently now, i got mouse to replace all the macro requirement, and i do not require macros on Keyboard anymore.(Well, i gonna built/mod a keyboard with chameleon keyboard controller.

For Mechanical Keyboard, they are more responsive than membrane keyboard if you wished to know, because the switch gets detected when you press the switch half way,(2mm to gets key press detected, 4mm to bottom the key)
This might be sounds pretty unimportant towards users that are still using membrane keyboard, but you can ask users around here about it.

Current market Keyboard Controller which offers NKRO does not have Macro Functions, Unless they install 2 different controller or using their own controller.

Which you can see why Razer blackwidow has Macros feature but only 2KRO is supported. while Corsair Vengeance K90 Keyboard has different controller on the Macro Buttons.(Can't confirm for Corsair using 2 controller, But the 18 Macro buttons are using membrane key, so i assume they are using a different Controller to support the Macro keys)
Unless you decided to mod yourself, i'm thinking about installing Chameleon Controller on the keyboard that i work on. but still considering.

Edited : Fix Typo.