The
Macbook Pro 15" (Early 2013), which is similar to the Mid-2012 version, was released with 802.11n Wi-Fi AirPort card. I have the
AirPort Extreme (6th Gen) router at home. When I had an iMac, before I sold it, it would connect at 1300Mbps through 802.11ac. But with my Macbook Pro, it would only connect at the 450Mbps limit of 802.11n. The late-2013 Macbook Pro released by Apple included 802.11ac AirPort cards, which a
teardown from iFixit revealed, was also the same size and connection type as the early-2013 version. So this meant that you could upgrade the AirPort card in the early-2013, as well as mid-2012 Macbook Pros.