OS X Yosemite 10.10.3 public beta is now available for download. The beta is available to users who signed up for Apple’s OS X public beta program, which was launched last year
It is strongly advised to back up your Mac with Time Machine before any beta version of OS X, let alone a beta version of photo management software. Absolutely back up your photos before using the beta Photos app.
The new Photos app for Mac is similar to Photos for iOS, and relies heavily on iCloud Photo Library. The app aims to replace iPhoto.
OS X Yosemite 10.10.3 includes the all-new Photos app, which replaces Aperture and iPhoto. In both appearance and features, Photos for OS X is similar to the Photos app bundled in iOS. The two apps share the same approach to photo management with both versions featuring a robust organizer coupled with basic editing tools.
What Is iCloud Photo Library?
While Apple has offered some iCloud photo services such as Photo Streams for some time, iCloud Photo Library is a new service still in beta that moves the user's entire photo and video library into the cloud. The service is part of Apple's push to make it as easy as possible for users to switch among Mac and iOS devices throughout the day, making the user's photos are available on all of their devices and ensuring any changes get quickly synced across devices.
icloud_photo_library
Initially planned to launch as part of iOS 8.0, Apple pushed the service back to beta ahead of the public release as the company continued to refine the service and work on cross-platform capabilities. The Mac portion was also not ready for the public release of OS X Yosemite last October, but with the new Photos app for Mac ready for launch, all of the pieces are falling into place for iCloud Photo Library.
Turning on iCloud Photo Library
iOS 8.1 or later: Open the Settings app and head to the iCloud section. Make sure you're logged in, and access the Photos section, where you'll find a toggle for iCloud Photo Library. This option can also be accessed through the Photos & Camera section of Settings.
OS X 10.10.3: Open System Preferences and head to the iCloud pane. If you're logged in, you'll see a list of the various iCloud services. Hit the "Options..." button next to Photos, and you'll see a window where you can turn on iCloud Photo Library. You can also manage settings within the Preferences section of the new Photos app directly.
iCloud.com: Photos stored in iCloud Photo Library are also accessible through Apple's web-based iCloud.com service. Through the web interface, users can upload or download photos, browse via Moments and Albums view, print or email photos, and mark individual photos as favorites.
iCloud Photo Library Settings
The new Photos app for Mac that arrives with OS X 10.10.3 is built to work with iCloud Photo Library, although users can opt to use local photo libraries on their machines if they prefer. Users opting for iCloud Photo Library have the option of storing the original photos on their Mac, which is ideal for offline access, or a more flexible optimized arrangement that stores originals locally if you have enough storage space but uses lower-resolution versions if local storage is tight and only downloads the full-resolution versions from iCloud as needed.
iCloud settings in Photos for Mac preferences
Similar settings are available on iOS, where users can choose between storing full-resolution photos right on their devices or saving some space by storing lower-resolution versions onboard and keeping the full-resolution version in iCloud.
On iOS and OS X, users will also continue to see an option for My Photo Stream, which is Apple's existing service that allowed users to automatically sync their last 1,000 photos between devices. On devices where iCloud Photo Library is active, there will no longer be a separate My Photo Stream album, as all photos are now included in the main library stored in iCloud.
The My Photo Stream setting does, however, offer some level of integration between devices where iCloud Photo Library is enabled and those where it is disabled. Turning on My Photo Stream on a device with iCloud Photo Library is enabled allows the device to import Photo Stream photos from other non-iCloud devices and also send new photos out to My Photo Stream for display on those devices.
Using iCloud Photo Library
Once you understand that iCloud Photo Library stores and syncs photos across devices, usage is very straightforward and it behaves very much like a local photo library stored on the user's machine. Users can freely manage, edit, and save their photos as they have always done, with the added bonus of that work automatically appearing wherever they have iCloud Photo Library enabled. The original photos always remain stored in iCloud, making it easy to revert any edits made on a device.
As with a local photo library, users can include photos from any source, making iCloud Photo Library more than the familiar Photo Streams of images taken on their devices. Photos and videos of a wide range of types from any source can be added to the user's library on one device, and they will sync to all other devices.
One important consideration when deciding whether or not to use iCloud Photo Library is that it is an all-or-none proposition on a given device unless the user chooses to use multiple photo libraries on OS X. With a single photo library, there is no option to sync only some photos while the remainder remain stored only locally, so for example, users can not opt to have only their iOS device photos synced to their Mac via iCloud Photo Library but not have their full library of photos in the Photos app for Mac synced to iCloud and the user's other devices unless they want to manage multiple libraries.
http://www.macrumors.com/guide/icloud-photo-library/
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