BazW wrote:
I'm clutching at straws here but do you have any idea why in SystemPreferences>Networks>Advanced>Proxies: Bypass proxy settings for these Hosts I have the following entry? - *.local, 169.254/16
Could it affect the pinging in any way?
No. Those entries are normal/default. It means that for any address set with .local in its name or with the self-assigned 169 address, then the proxy should not be used. But I would expect that for a home network you would not have/need a proxy address set in the Mac. Is this correct?
Also, do you only have an address configured for the wireless (Airport)? Just thinking that if you also had the Ethernet connected and configured then this could be conflicting with the ping and connection.
And just for clarity, are you using DHCP (except for the printer as mentioned) for all the computers? The printer has .2 while the Mac has .3. What network address does the other computers have? And is the router .1 and can you ping it?