Yes, I have tried another Mac using same version of OSX and Safari, using the same internet connection, and encountered no problems in accessing the web page, and logging in to my blog. I visited a Mac store and they could also view my site.
This problem only happens on my Mac. I’ve tried creating another user account on my Mac and I get the same problem with the Not found error. I think the next step is to reload OSX. Perhaps it has become corrupted somewhere.
This seems to be a Mac problem specific to my computer and not a WordPress problem. Unfortunately my Mac is out of its Applecare warranty. I would appreciate any suggestions that might help fix the problem.
Thanks,
Lynn