This should be fairly straightforward (for non-subdomains of Rails applications). This is definitely getting more complicated with subdomains.
Unsupported application
From your Mac terminal:
ifconfig -a
Copy the assigned IP address (e.g. 192.168.1.100)
Parallels, IE IP- . Rails. :
http://192.168.1.100:3000
! Rails.
, - lvh.me, (. ASCIICasts 221: Rails 3). , Windows.
Windows hosts. - C:\WINDOWS\system32\drivers\etc\hosts
, IP- , , , , :
192.168.1.100 lvh.me sub1.lvh.me sub2.lvh.me ... subN.lvh.me
sub1, sub2,..., subN - , IE.
http://sub1.lvh.me:3000 IE.
IP- DHCP, OS X Home, DHCP IP-. , , . , . YMMV:)