Apple has been busily preparing the Moscone Center in San Francisco for its Worldwide Developers Conference, which begins today. New banners have been spotted that confirm Apple will announce iOS 6, its next operating system for iPhone, iPad and iPod touch, at the event. iCloud and OS X are also set to be hot topics of the week.

CNET reports that the iOS 6 banner was spotted on Friday, where a photographer snapped the photograph below. The photographer also caught glimpses of AirPlay and Game Center posters.

Photos of the WWDC jacket that Apple is giving away to all attendees have also emerged, showing a black, white and gold jacked with WWDC on the front and the number 12 on the back.

It is expected that Apple will launch new MacBooks, and possibly an update to the Mac Pro. An Apple branded smart TV could also make an appearance.

To watch our live feed of Tim Cook’s keynote this afternoon, tune in here at 6.00pm.