With two major application to jailbreak an iPhone 4 using a Mac:
PwanageTool
Redsn0w
And not to forget Chronic Dev Corona (for untethering a tethered jailbreak)!
In your experience, which of the above is the preferred method and why?
PwanageTool
Redsn0w
And not to forget Chronic Dev Corona (for untethering a tethered jailbreak)!
In your experience, which of the above is the preferred method and why?