It's not doing internal positioning with Channel State Information (CSI), but there are folks that are [1]. The approach in FIND is different [2] - FIND just uses RSSI+MAC information which works great on mobile devices and simple esp8266 chips and doesn't require code for the specific network interface. As far as I know you have to write some network card specific code to be able to use CSI.
Sorry! Apple is very restrictive. iOS 9+ is supports access to WiFi RSSI, but requires permission and approval from Apple. We requested permission 3 weeks ago and no word yet.
