Yes, I also have 2 laptops (Apple) and a MAC mini connected on the same network without any problem. I am using one right now, actually.

If your 770 is so unstable that it is unusable, you may want to reset it. Unfortunately, that means reflashing it, unless you saved earlier settings. That rendered mine more stable (but still not very stable as noted).

A question: did you add and delete a lot of networks to try out things in the beginning? I have a feeling that it was what rendered my 770 unusable originally.