I have correctly installed the builder on my Mac (at home). Since my provider provides a dynamic IP (changes within minutes!) the only way I had (and still use) to access my home network is to use a Fully Qualified Domain Name based on a dynamic DNS.
It seems that B4I, however, accepts only IP addresses and is unable to resolve a domain name to IP to access it.
Your local builder ,development pc and iOS device should be in same intranet, and have static ip, the ports(51042/51041) should be available. You need a wifi router.
non on an intranet... that's why I need to use the access the computer using the public IP... which it works. The issue is that if I use a domain name, instead, B4I does not perform the conversion to the underlying IP address to access it