iH8Sn0w made the announcement on Twitter:
Updated p0sixspwn for Windows&Mac to v1.0.5. Should fix some issues and Mac version should now support Snow Leopard. http://p0sixspwn.com
P0sixspwn can jailbreak iOS 6.1.3, 6.1.4, and 6.1.5 devices. You can find download links for the utility here.
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