Answer to "Wireless Airport Card Replacement with New 802.11ac"Making the switch to wireless ac is worthwhile and the best way to go about it is just as you are doing by updating one device at a time as the opportunity presents itself. Since wireless ac is compatible with all previous forms of wifi, interconnectivity will not be a problem. There is one issue with using the Intel 7260 card in your specific computer, though. I have read somewhere that the 7260 will only work on Intel Haswell-based computers. I believe it even mentions that on the Intel web site.