Sierra installed successfully, but Wifi doesn't even come up as an option. How do I get WiFi working on my hackintosh?

Specs:

• Desktop PC
• Processor: Intel Core i7-4790K CPU @ 4.00 GHz
• Ram: 16gb
• System: 64-bit, x64-based processor
• Video Card: NVIDIA GeForce GTX660
• SSD: Samsung 850 EVO 250GB (installed Sierra on this)
• Motherboard: ASUSTeK COMPUTER INC. MAXIMUS VII HERO (SOCKET 1150)

I'd like to get WiFi working on it (duh!) as this will be my daily driver for web design, development, emails, etc.

I went to System Preferences > Network, clicked the + button to add a Wifi network, and Wifi doesn't even come up as an option!

On the Windows install, I've been using a WiFi adapter (can't remember the make or model atm, at work). No wireless card, just the adapter. Plug it into the USB, works perfect. It would simply scan and catch the WiFi signal, and connect.

Is there a driver or something that I need to get this working?

Edit: All I've ran so far in terms of installing anything, is Sierra followed by the Multibeast install.