Apple has reportedly begun seeding the beta version of OS X 10.9 Mavericks to its Apple Retail employees, and is also expanding testing of iOS 7 to Cupertino locals in order to get feedback on the design and interface changes.

9To5Mac reports that select Genius Bar and on-floor Apple employees have received an invitation 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," the message reads. "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 new features like iBooks, Maps, Calendar, Safari, iCloud Keychain, Multiple Displays, Notifications, Finder Tabs, Tags and much more."

In addition to enabling Apple to get feedback on OS X Mavericks, it will also allow staff at Apple Stores to familiarise themselves with the new software before it launches later this year.

SEE: OS X Mavericks: Apple's developers discuss Apple's new love for power users

Sources have also told 9To5Mac that Apple is expanding testing of iOS 7, by holding on campus sessions with Cupertino locals. These locals could be family members of Apple employees, it has been suggested.

SEE: Apple iOS 7 for iPhone and iPad preview & first impressions

iOS 7 and OS X Mavericks were first previewed at WWDC on 10 June, with all-new features and, for iOS 7, a completely redesigned user interface.

See also:

Apple iOS 7: Why I'll miss skeuomorphism

Apple redesigns widely criticised iOS 7 app icons

Will I be able to update to iOS 7 on my iPhone?

How to update your iPhone or iPad to iOS 7

Apple gives Jony Ive new job title following iOS 7 redesign

Latest iPhone 6 concept design inspired by Apple iOS 7 debut

Four ways OS X Mavericks will save your MacBook's battery

Why did Apple call OS X 10.9 Mavericks

New OS X Mavericks (10.9) release date, UK pricing

5 reasons why Mac OS X 10.9 Mavericks isn't names after a big cat