Well, in the end this isn't a problem that can get answered here.
First of all, this is a forum for Microsoft programming tools, not Apple web browsers. Secondly, I couldn't even start to give you a solution because not only do I not have Safari installed, I don't even use McAfee. You will probably find it the same with quite a few people here too. Thirdly, this is a forum for peers, so you can't expect proper help here. The only real Microsoft personell I've seen here are the people working on the compilers, and they certainly can't help fix a problem with McAfee and Safari.
Whats more, it is beta, so if the company who make it won't support, what chance will you have in getting a rival company to support you?