Another update, Redsnow o.9.7 Beta 4 to Jailbreak iOS 4.2.1 iPhone, iPod Touch and iPad. This Beta 4 is a test release and there are many of unexpected bugs so stay away from Untethered iOS 4.2.1 jailbreak . As this updated version eleminates the need of seperate USBMuxd process, so now many Mac users can now use it.
Dev team : The fourth beta is now available for developers only. After starting this update you no longer need to run a seperate program for usbmux. we also thing about fixing of a race condition in GUI by which redsnow crash during Preparing JB Monte Files