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• The permissions for your Photos library may conflict with those for the Time Machine backup. Manually copy your library to an external storage device: Drag the Photos library (by default in the Pictures folder on your Mac) to your storage device to create a copy. If you have more than one photo library, be sure to back them all up.
• Feb 23, 2017 We’re going to show you how to locate the image files that are contained within the Photos app on Mac OS. This is specific to Photos app, if you don’t use the Photos app to manage pictures on your Mac then your photos will not be stored within the applications package library and instead you’d likely find them through Finder in the generic Pictures folder or elsewhere in Mac OS.

• Mac Photos Library On External Drive Disappeared Mac
• Mac Photos Library On External Drive Disappeared Windows 7
• Copy Photos Library To External Drive

Back up your library

In macOS Catalina if you are not using Apple Music you can choose to store your music files on an external drive. There are a number of methods you can use. Also learn how to clear out your Music app library to start from scratch.

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.

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

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

By Stephen Robles
Tuesday, February 03, 2015, 09:17 am PT (12:17 pm ET)

When trying to free up drive space on your Mac, one of the first things you can do is move the iTunes Library to a portable hard drive. Here's a detailed guide on how to back up your music, movies and more to reclaim your hard drive.

Mac Photos Library On External Drive Disappeared Mac

All the music, podcasts, movies and TV shows you've downloaded to iTunes are most likely taking up a good amount of hard drive space and can easily be moved.

Mac Photos Library On External Drive Disappeared Windows 7

Before starting the process, we suggest making an up to date Time Machine backup of your computer to an external hard drive or Time Capsule. Be sure the external hard drive you use to perform this backup is different than where you will move the iTunes Library should anything happen.

To begin moving your library, open iTunes, click File in the Menu Bar and select Library > Organize Library

Check the box that says Consolidate files and click OK. This will make sure all the music, movies and other files are actually located in the iTunes Media folder that will be moving to your external drive.

If you moved your iTunes Media folder in the past, it is best to double check the folder iTunes is actually accessing for your library files. To do this, go to iTunes in the Menu Bar > Preferences and click the Advanced tab.
Under the iTunes Media folder location you will see a path to the files you are about to move. By default, this should be located in the Music folder of your Home directory.

Quit iTunes by going to iTunes in the Menu Bar > Quit iTunes or press Cmd + Q. Connect the external hard drive that you will use to copy the iTunes library. You should see it appear on your desktop.

Open a new Finder window and click Music in the left sidebar. Click and drag the iTunes folder onto the external hard drive icon on your Desktop.

Copy Photos Library To External Drive

Depending on how large your library is and the connection speed of the external drive, it may take several minutes or longer to complete the copy process.
Once the copy is completed, hold the Option key on your keyboard and open iTunes from the Dock or Applications folder again. A new window will pop up asking you to Create Library or Choose Library. Click on Choose Library.

In the browser window that appears, navigate to your external hard drive, click the iTunes folder there and choose the iTunes Library file.

iTunes will then open and as long as the external hard drive is connected, iTunes will reference the library on the external drive and not on your computer's drive.
Quit iTunes once again and eject the external hard drive holding your new iTunes Library. Open a new Finder window and navigate to the Music folder in the left sidebar again.
Right click or Ctrl+click on the iTunes folder and move it to the Trash.

Finally, to free up the space on your internal hard drive, open the Trash from the Dock or Finder window and click Empty Trash in the upper right corner.

Your iTunes Library has officially been removed from the internal drive. You can now reconnect the external hard drive you used to copy the iTunes Library, open iTunes and use it as normal.
If you open iTunes without your external hard drive connected, iTunes will give you an error message saying the 'Library cannot be found.' Quit iTunes, connect the external hard drive and reopen iTunes to fix.
You may want to copy your iTunes folder onto a second external hard drive as a backup as well. iTunes Match for $25 per year will also backup all your music to Apple's cloud service.

Where to buy an external drive at discount

Choosing a high-quality Mac-formatted external hard drive instead of an Apple-branded Time Capsule will often save you hundreds of dollars. Of all the Apple Authorized Resellers who deal heavily in storage devices, B&H Photo, Adorama, and Amazon offer the best mix of brand options, discounted pricing, availability, and cost-free shipping. Below are some quick links that jump to the available Mac-formatted storage options currently available from these resellers:
1TB to 6TB External Hard Drives (Mac Formatted) from $95.99 @ B&H
1TB to 6TB External Hard Drives (Mac Formatted) from $119.00 @ Adorama
750GB to 6TB External Hard Drives (Mac Formatted) from $65.00 @ Amazon
500GB to 6TB Portable Hard Drives (Mac Formatted) from $99.00 @ B&H
500GB to 6TB Portable Hard Drives (Mac Formatted) from $56.99 @Adorama
500GB to 6TB Portable Hard Drives (Mac Formatted) from $58.00 @ Amazon