iRig is compatible with iPhone 5, iPhone 4S, iPhone 4, iPhone 3GS, iPod touch (5th, 4th and 3rd generation), iPad 4th generation, iPad 3rd generation, iPad 2, iPad and iPad mini. iOS 4.3 or later is required.
Mac®: Most Mac computers starting from late 2008 are compatible with the exception of the Mac Pro line.
To check if your Mac is compatible select: About This Mac > More Info > System Report > Audio
and check that "External Microphone / iPhone headset" is appearing on the list of included features.