A new Mac Pro will be launched at WWDC tonight, and feature a dual GPU and Thunderbolt 2, if a supposedly leaked mockup screenshot from Apple's website is legitimate.Related StoriesMac Pro 2013 will be 'something really different' - Apple product managerA new Mac Pro: What we'd like to seeUS reCommerce site sees 171% jmp in MacBook trade-ins as WWDC refresh rumours flood in
