This question is an exact duplicate of:
So basically when installing Kali Linux on my MacBook Pro (single boot setup) I saw that it said no Ethernet card was found. I just clicked "don't use" as I assumed I could setup wireless later. Well now it's later. My Mac doesn't have an Ethernet cable, and in confused how I can get my MacBook to recognize my wireless card, so I can use a wireless connection. All help appreciated.