I currently am connecting my iMac to my wireless network through an external USB wifi adapter and it is working great. I tried just using the iMac's internal wifi, but I wasn't able to reliably make a connection. My router would register between 14% and 18% signal strength from the internal antenna, which apparently wasn't enough. With this big external antenna I bought on newegg, I am able to average around 35% signal strength to the router and my connection is fast and 100% reliable. The thing is, I have other wireless devices in this room that could use a signal boost. My PS3 can't make a reliable connection to the router either, and my iPhone is only a little better. So now that I'm using an external wifi adapter to communicate with my primary wireless router, is there a way that I can use the internal wifi function of my iMac AND/OR my iMac's ethernet port to share the good connection with other devices in the room?