I have lost access when I open Safari to the internet. An error code 503 Service Unavailable comes up.
I Mac, OS X, Version 10.8.5
When I open Safari and type in a web address or topic the following appears and denies access: 503 Service Unavailable.
I have obviously changed something and I don't know how to correct it. Please Help
iMac, OS X Mountain Lion (10.8.5)