How to edit your Mac's Hosts file, and why you would want to

[iMore.com]

If you're setting up a new web server or another device that's going to be connected to the Internet and you want to put it through its paces before it's live, or if you're having trouble with spyware and adware networks, there's an invisible file on your Mac that can help. It's called the Hosts file, and this is how to use it.

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