Solution 1: Use Mac Built-in Photos Library Repair Tool If Mac photos the library could not be opened or it is showing unexpected errors, then Photos Library Repair Tool is one of the best ways to fix it. This is a built-in repair tool, comes with macOS and it is pretty easy to use. Click the System Preferences icon from the Dock. Click Desktop & Screen Saver, and go to the Screen Saver tab. Choose the style you want from the menu on the left. Make sure you click a photo-based style, otherwise you won’t be able to use the Photos Library as a source. On iMac with Yosemite, my screensaver has lost the option to use photos. Where there should be an option to select a photos folder there is only a bar 'Screen Saver Options' i.e. Color, speed etc of the cg saver options which are still available. If I try to select a photo option e.g. 'Photo Mobile' I get an endless rotating color disk. In the Finder, go to the external drive where you want to store your library. In another Finder window, find your library. The default location is Users username Pictures, and it's named Photos Library. Drag your library to its new location on the external drive. Hold down the Option key and open Photos. One of the photo libraries is already designated as YourLibraryName (System Photo Library). Choose the library you want to designate as the System Photo Library. After Photos opens the library, choose Photos Preferences from the menu bar.

Best Screensavers For Mac

Own a wallpaper collection

Juggle desktop backgrounds with Wallpaper Wizard app.

Since the introduction of macOS Mojave, Mac desktop backgrounds got quite a bit more lively and dynamic, adapting to the exact hour of the day. But even then, let’s face it, default Mac backgrounds are pretty boring. When everyone sports the same wallpaper as you, it comes across as a sign of laziness and conformity. Luckily, we can easily spice things up!

There are lots of options for you to choose as your background, from a set of default ones to anything customized. Here, we’ll explore how to change background on Mac quickly as well as touch on how to change screen saver, so you never get tired of looking at your Mac.

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How To Change Wallpaper On Mac

If you simply want to switch away from the default Mac desktop wallpaper, you should first try one of the Apple backgrounds already pre-installed on your Mac.

Changing MacBook backgrounds is easy:

Open System Preferences ➙ Desktop & Screen Saver
Make sure you’re in the Desktop tab
In the sidebar, open Apple ➙ Desktop Pictures
Click on any of the pictures to set it as your background

Set custom Mac backgrounds effortlessly

To divert from Apple’s preselected style, Macs allow you to set any image of your choice as a Mac desktop wallpaper. Simply find the image anywhere on your Mac, right-click on it, and select Set Desktop Picture from the menu. In case your image is in the Photos app, open it up, click on the share icon, and choose the Set Desktop Picture option from there.

When choosing a custom background, check that it fits the desktop just right. If not, adjust the fit by selecting a dropdown and picking from either Fill Screen, Fit to Screen, Center, etc.

Rotate a collection of Mac desktop wallpapers

There’s also another way to add your own group of images, which gives you more flexibility in terms of setting them to automatically rotate later on:

Go to System Preferences ➙ Desktop & Screen Saver
Click on the plus sign in the bottom-left corner
Navigate to the picture folder of your choice
Click Choose to add the option to the Desktop menu

Now your folder should be visible in the sidebar of the Desktop & Screen Saver window. You can still just select one of the images out of the folder. But if you want the images to rotate:

Check the box next to “Change picture”
Set the frequency from the dropdown

Remove duplicates from your image folder

Most of the time, the image folder you set to be rotated is the one from your recent trip or maybe even a photoshoot. Hence it’s likely to contain lots of similar photos: the ones taken from the same angle of the same object. How do you get rid of them? Going through the whole folder yourself and deleting all near duplicates one by one is boring and time consuming. Instead, you should use an automatic solution.

Gemini is a lightweight but mighty duplicate finder utility for your Mac. Its AI-based algorithm not only finds the exact duplicates in any folder on your Mac, it also compares all the similar pictures and preselects the redundant options for a one-click removal. Don’t worry, Gemini makes it easy to restore any files that were wrongly deleted.

Before selecting your folder for Mac desktop wallpaper rotation:

Open up Gemini
Drop the folder right onto the app
Click “Scan for Duplicates”
Remove any similar photos that Gemini has found

Retouch all the images at once

Once you’re sure no duplicates or similar-looking images are left in your picture folder, you might want to adjust them in one way or another for a better look.

It could be that your images are of a different size than the MacBook Pro backgrounds, or you’ve been shooting in RAW format and need to convert images to .jpg, for example. Again, you probably already have a one-by-one workflow that does this, but is there a faster way?

PhotoBulk is a powerful image processing app that was designed to work specifically with batches of photos, editing dozens or hundreds at a time. It’s perfect for resizing, changing formats, renaming, compressing, and watermarking.

Using PhotoBulk is as straightforward as an editing app can be:

In the app, add your picture folder using the plus icon in the bottom left
Choose the modifications you’d like to do in the sidebar
Adjust those edits and click Start

Now when you got rid of all the duplicates and made the necessary edits to your photos, you can add your photo folder to Desktop & Screen Saver and be sure it’ll look good there.

Rotate beautiful backgrounds automatically

Having your photos rotate as your MacBook backgrounds is great. But what if you don’t have any high-quality pictures around? Or just don’t want to spend any time setting something up?

Mac Screensaver Photo Library Missing Pages

Bring beauty to your Mac desktop

Mac screensaver photo library missing files

Download Wallpaper Wizard to rotate your custom desktop images on Mac. Get immersed in the creatives that were made just for you.

Wallpaper Wizard was created to rescue your Mac desktop wallpaper and bring beauty and inspiration to it. The automatic rotation function is already built in and you can choose from more than 35,000 high-quality royalty-free images to keep your collection ever-fresh.

Starting with Wallpaper Wizard is quite straightforward:

Browse the app for the broad category you like, whether People or Vehicles
Choose a specific set of images
Click on the plus icon to add them to your Roll

You can also create your own Rolls by clicking on the plus icon of specific images. And if you just want one of the beautiful Mac desktop backgrounds from Wallpaper Wizard to be static, simply open it up and choose Set Desktop Picture.

Choose and install the best screensavers for Mac

Once you’ve decided what your MacBook backgrounds should be, you can similarly adjust your Mac screensaver too. You know that you have a screensaver on your Mac by default, right?

To see your current Mac screensaver, just go to System Preferences ➙ Deskt