My Mac says a connection timeout occurred

that is a statement. What is it you need help with?

how about giving us some information as to when it happens so we don't have to guess? It would also be helpful to know what macbook pro you are using and the version of OS X you are using. The more info, the faster we can assist you.

I had the same problem with my new Belkin Router. I used all the tricks suggested by others and it worked for some time then the same problem. I chnaged to my old Router (Belkin but of a lesser version) And since then I have no more problem of a "Connection Time out" Only problem is that my old Router is of only lesser speed but there is no irritation of the connection time out.

Here is the solution. You need to force the mac to re-read the password in the key-chain access. That is essentially the workaround until apple comes up with a solution. This blog post shows you the detailed steps.

Could not join “network name”. A connection timeout occurred.

This worked for me after nothing else did: I chose Join Other Netwrk, entered the network name, entered the network password, and selected the correct password type.

I had been connected to the network before, but enountered the "timeout" nessage every time I tried other ways of connecting..