Just stumbled across this thread and very interesting.
I've a macbook pro 17" late 2011 and it's perfect apart from not having ac wifi. Back in July 2017 I ordered the uCard 4 from Quickerteck and paid for it using paypal (after an email exchange with a Rick from Quickerteck who said he was using the exact same laptop and had had the card inside working fine so I was full of confidence). After waiting and waiting for delivery - like a couple of months (I live in the UK so expected it to take a bit of time) - I contacted them and they just said 'we are just waiting for a new batch to be made'. F@£!£R@Qing hell, so why didn't you tell me that when I placed the order!! Anyway, they gave me a refund but what were they playing at - I just don't understand them because apart from this episode they seem a legit company who have been running for quite a few years.
Anyway anyway, can anyone recommend a usb adapter that I can use to get ac wifi for my 17" 2011 macbook pro (taking into account that it is only USB2?)