I am having intermittent wifi connectivity issues with two Macbook Pros (mid 2012) on my wireless network. I have slow connectivity (request timeouts, dropped packets, etc.) that is always accompanied with a drop in the number of available wifi networks in the wifi drop-down menu. There are usually 10-15 or so visible. When the connectivity problem occurs, only 2-3 will be available, and sometimes the only visible network will be my own. The connectivity issues persist until other networks appear.
I recently replaced the router to try to fix the problem and now have a dual broadcast 5G/2.4G router. This did not fix the problem. It occurs when connected to either 5G or 2.4G. Resetting the router may or may not help (it helps some of the time, but doesn't help enough of the time that I think resetting may not actually do anything).
I have changed the broadcast channel, I have used auto-scan, neither seems to reliably fix it.
