The long awaited iOS6 untethered jailbreak is now out for Windows, Linux, and OSX supporting all recent idevices such as the iphone 5. You can download it and read guides on how to use it at Evad3rs site:
Lots of hours went into this JB. I’m sure the teams would appreciate it if you used the donate button inside of it and sent them a small donation for their efforts (optional of course).
As always, cydia will be extra busy in the first few days so if you’re having cydia related issues, try later is a good suggestion.