So today we did a service call on a reoccurring problem with wifi on a small project with a simple RTI processor. The wifi consisted of 2 Engenius AP's hooked to 2 PoE's from a cisco SBC switch. A project we have done over and over for the last 3 years. Dozens and dozens. We walk right in the door and all of our products would connect just fine i.e. - android phones and a PC. But, the client's mac air, iphone and ipad would not. (Apple products were connecting to the wifi but had an !, indicating radio connectivity but no data)

Long story short, squirrels chewed into the wiring in the attic. In this case, they chewed thru the 2 greens on the cat5 to the nearest access point. So, this AP had power but no data. The other AP was just fine. And here is where it gets interesting...

Every product that wasn't an apple, would jump to the working access point without fail. All apple products would jump/stay on the nearest access point regardless of the fact that its data connection was cut (literally).

In (our) conclusion, Apple products were not smart enough to lock into the AP that was working.  Every other product, Samsung phones, Lenovo PC, etc not apple, would jump to the nearest working AP.