Registered Apple developers have been able to test OS X 10.9 Mavericks and iOS 7 since their announcement at WWDC 2013, but reports are now emerging that Apple is widening the reach of both slightly. According to 9to5Mac's Mark Gurman, selected Apple retail employees are now receiving an invitation to test out Mavericks for themselves:

"You are invited to participate in the pre-release OS X Mavericks seed program. Participation, including submitting feedback, is completely voluntary and not an expectation of your job. If you accept, we will provide you with a pre-release version of OS X Mavericks to install and use. You will get to preview all of the exciting new features like iBooks, Maps, Calendar, Safari, iCloud Keychain, Multiple Displays, Notifications, Finder Tabs, Tags, and much more! You should use OS X Mavericks only your personal computer and on your personal time. Apple will provide you with ways to submit feedback on your experiences with OS X Mavericks, should you choose to do so. Apple also asks that you use future builds of OS X Mavericks as they are made available. The responses from prior seed programs have been overwhelmingly positive. Thank you to everyone who participated!"

Sources have also indicated that Apple is turning to the residents of Cupertino to assist with iOS 7 testing. Apple is said to be holding on-campus sessions with the locals in order to garner feedback on the latest version of iOS. It's unclear how people have been selected, but it's said that they are likely relatives of Apple employees.

Source: 9to5Mac