I use a Netgear R7000 router that used to provide almost full coverage over two floors in my house on almost all my devices. I recently got a Macbook 12 which seems to be having major issues when it is some distance away from the router e.g. In a room where I used to get seamless connectivity on my Macbook Air 13 (early 2014) with a RSSI of 78-80db, the macbook 12 struggles real bad almost to the point of being non usable Interestingly the signal value it shoes is around the same (RSSI ~80db, noise of around 95dbm) yet at the same signal level, it is unable to access the net or even ping the router. I would like to believe it is a software issue rather than a hardware limitation (like a weak antenna) esp given the fact that the signal levels reported by OS X are roughly the same As a workaround, I have temporarily installed another router on the 2nd floor but of course, the experience is nowhere as seamless as what it used to be with the macbook air with which there was no need to switch networks FWIW, an older macbook 11 (2011 model) also works in the weak coverage areas albeit with some dropped packets - The macbook 12 on the other hand drops all packets in the same areas All systems were running 10.11.3- I update the macbook 12 to 10.11.4 but that hasn't helped either. Any thoughts?