Alternatively, you can open Photos in another user account on your Mac and note whether Photos opens successfully. If Photos opens with the new library, or in a different user account, it might mean that there's an issue with your library. Follow the steps to use the Photos library repair tool on your main Photos library. Apple said Friday that it will cease development of its professional image tool Aperture and transition users to the new Photos app in 2015.

1. Apple Mac App Store App

Welcome to our class on Photos for Mac 2015! Today I’m going to be showing you how to correctly move your data from the traditional iPhoto library over to the cloud so that everything starts to sync correctly, and so you can access all your photos on all of your mobile devices (well, Apple devices, that is). Prior to Photos, Apple made two apps for managing pictures and videos. /photos-google-mac-app.html. IPhoto, for those of us less experienced in photography, and Aperture, for the ones looking to do some heavier editing. Photos perfectly blurs the line between those two apps, combining the best of both while adding new features like iCloud Photo Library and iCloud Photo. Today, Apple revealed more information about the long-awaited Photos app for Mac, a complete revamp of how you organize, edit, and share photos and videos on the Mac. It fully replaces iPhoto. Organize your collection into albums, or keep your photos organized automatically with smart albums. Perfect your images with intuitive built-in editing tools, or use your favorite photos apps. And with iCloud Photos, you can keep all your photos and videos stored in iCloud and up to date on your Mac, Apple TV, iPhone, iPad, and even your PC.

Back up your library

Before following any of these steps, it's a good idea to create a backup of your photo library, even if you use iCloud Photos. You can use Time Machine, use a third-party backup solution, or copy the library to an external drive. By default, your photo library is stored in the Pictures folder within your home folder.

Make sure that your software is up to date

Photos is part of the Mac operating system. You can avoid or fix many issues by running the most up-to-date version of macOS. Learn more about updating the software on your Mac.

If you use RAW images in Photos, learn more about the digital camera RAW formats supported by iOS, iPadOS, and macOS. How to completely uninstall app on mac.

If you have trouble migrating an existing iPhoto or Aperture library to Photos

You might see an alert message when you first open Photos or migrate an existing iPhoto or Aperture library. Learn what to do if Photos can’t copy or create a library.

If the Media Browser isn't showing your photos and videos

Use the Media Browser to make images from your photo library available in other apps, like Pages and iMovie. The Media Browser shows only the contents of the Photos library designated as the System Photo Library. If you have more than one Photos library—and the one you're using isn't set as the System Photo Library—the Media Browser won't show its contents.

Follow these steps to designate the current library as the System Photo Library:

1. Choose Photos > Preferences.
2. Click the General button at the top of the Preferences window.
3. Click Use as System Photo Library.

If you're having other issues with Photos

If you're experiencing other issues—like missing or blank photo thumbnails, unexpected behavior, or if Photos won’t open—try to see if it's an issue with your library by following these steps.

Create a new Photos library and see if your issues persist:

1. Quit Photos.
2. Press and hold the Option key while you open Photos.
3. In the dialog that appears, click Create New.
4. Give your new library a name, then click OK. Note whether Photos opens successfully with this new library.

To return to your main Photos library, quit Photos. Then open it again while holding the Option key, select your main library, and click Choose Library.

Alternatively, you can open Photos in another user account on your Mac and note whether Photos opens successfully.

If Photos opens with the new library, or in a different user account, it might mean that there's an issue with your library. Follow the steps to use the Photos library repair tool on your main Photos library.

Learn more

Apple Mac App Store App

• Learn how to create and order print products like books or calendars in Photos with Project Extensions.
• Get help with iCloud Photos.