the requirements (as listed on the evasi0n website):
Code:
* 5 minutes of your time!
* A computer, running Windows (XP minimum), Mac OS X (10.5 minimum) or Linux (x86 / x86_64)
* An iPhone, iPad or iPod running iOS 6.0 through 6.1 (you may check in Settings / General / About => Version)
*A USB cable to connect the device to the computer
Mac OS X 10.5 is Leopard, it is available for both Intel and PowerPC Macs. so to answer your question, No, you don't need an Intel Processor to run evasi0n.app