[...]I bought Arduino Yun and just connected to my MAC I had to fight all night causes a wrong configuration of Arduino's wifi . [...]
- Yun AP mode only serves to configure the card WIFI and connect to your home network . In this mode, is not possible to program in wireless mode.
- The Wifi button reset does not seem to be very responsive. Sometimes happened to press button but the blu LED doesn't light up. Why?
When the yun comes out of the box, it's configured as it was in the US. USA wifi regulations prohibit certain channels, 13 in particular. This may be the reason for not having seen your wifi listed.
At this point, the only thing that is not clear yet is the possibility to programm wirelessy when Arduino is in AP mode. Last night I tried but without success.
... What I need is to have Yun stream sensor signals to a home computer, while my mobile phone can detect the Yun's WiFi signal strength to estimate the distance (everything under the same local network).