Sure, you have a couple of options... Note that you need a few things, depending on your Mac.. First you need the card, in my case the Broadcom BCM94360CD. You also need an adapter card to make the new small card fit. You also will likely want to add a third antenna for a good 802.11 AC experience.
OSXWifi sells a
complete kit with everything you need, it is not cheap but it will get you up and running in no time.
Myself, i didn't like that price so went over to eBay and got
this, much cheaper *BUT* i had to modify it because Apple mounted their PCIe slot backwards so the whole thing is flipped around (compared to the OSXwifi one which has the correct orientation). The card slot has a spring in that necessitates the use of a screw to hold it down, so you can't just stick it in. I made a small thin metal bracket to bridge the screw hole on the carrier card to the screw hole in my iMac. Again, i don't know what you have so none of this might apply. I also grabbed
these from Amazon, turned out i only needed one.
I'm glad i spent less, it wasn't too hard to make the adapter but it did mean i had to disassemble the iMac twice since my wife didn't like it being in pieces on the dining room table for the day it took to fab the bracket! ! i wish i had taken a photo of the my handiwork