No, Your Computer is NOT "Critically Infected"
This is a bogus alert that seems to be hitting Mac users, and these people will not help you.
They will take a lot of money if you call them and listen to them. There is actually no harm done to your computer by this little bit of javascript trickery.
The damage gets done if you call them and they convince you to give them remote access to your computer so they can "help" you. In fact, all they do is help themselves to private information, and a couple hundred dollars if
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