Apple has started sending out OS X Yosemite builds for Beta Program, as announced yesterday. The build is being sent out to a million Beta Program members. Participants can get a redemption code from the site, to redeem in the Mac App Store.
Apple has said that Apple will not update the Beta Program Yosemite builds as often as the developer seeds (which come out every two weeks, usually), but participants will be able to upgrade to the final public version of Yosemite seamlessly through the App Store, when it is released. The seed released in the beta program is one build newer than the one released to developers on Monday.
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Beta Program participants can leave feedback through the Feedback Assistant. Unfortunately, some of Yosemite’s tentpole features will not be available for evaluation as they require integration with iOS 8, which remains closed off to anyone but developers. Although the stability of seeds has been improving, a beta is a ‘beta’ for a reason and Beta Program members are not advised not to install it on their primary machine.
There are a few known issues with this build, that participants should be aware of.
Safari may hang when playing certain Netflix content. iPhoto 9.5.1 and Aperture 3.5.1 are required on OS X Yosemite. Update to these versions from the Mac App Store. When entering edit mode in iPhoto, a black screen may be displayed instead of the selected photo. Photo Stream and iCloud Photo Sharing may not function properly when both iPhoto and Aperture are installed. The shared purchase history page on the Mac App Store is disabled for Family Sharing accounts. iCloud Drive may appear empty in the Finder after first time setup. Restart to resolve this problem. AirDrop may not show nearby Macs. Sending files to another Mac using AirDrop may not work.