LittleSnitch is another great option if you want more customisation and control.
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The blurb Radio Silence has at the bottom of their page even reads "A hassle-free, and cheaper, alternative to its cousin Little Snitch."
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Indeed. That was the first one I learned about. It's fully featured for power users.
Yet another option is TripMode
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I wish they would let me buy it with Bitcoin.
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I like the fact that I can block any application from accessing the Internet on a mac. Really this should be included in the OS, but it isn't for some reason.
Seems quite nice and it's just $9 for a lifetime license. I think it's worth it.
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