The new version of Fathom needs a browser in order to run its
excellent help files and movies. Anyone have any suggestions on how we
might allow the browser to run without providing access to the
internet?
You could set Safari (or your browser of choice) to use a proxy server
for all http requests (System Preferences -> Network -> Ethernet ->
Proxies). Just set the proxy server IP to a bogus number.
All local pages will load without a problem, but nothing over the
network will work.