Mmmmmmm..... 
Scan and re-scan, enable and disable but, when Arduino is in WIFI mode connected to my Router, there is no way to show it in AP mode. =(
But, it's not a problem because I can programm wirelessy quietly without any problem.
Please take my curiosity, but if I connect my MAC to Arduino in AP mode e Arduino is connect to my wireless, can I go out in internet through my Arduino? In theory it should be yes.