• Merge Photos Library Mac
• Apple Photo Library

• The Best Way to Organize Your Massive Photo Library By Matthew Braga on June 10, 2010 at 1 p.m. For today's avid shooters, organizing a library of photos can be tough. But it doesn't have to be that way.
• 装满你的图库，却不填满你的设备。 iCloud 照片可帮你充分利用 Mac 上的存储空间。如果你选择“优化 Mac 储存空间”，全分辨率照片和视频都将以原始格式存储于 iCloud，同时在 Mac 上保存较低分辨率的版本，从而节省其存储空间。.
• To move our Photos Library, we drag it to its new location, double-click it, and the Photos app will now point to it. So, that was pretty easy. We’ll next show you how to create a completely new System Photo Library. Creating a New System Photo Library. There are any number of reasons you might want to create a new system library in Photos.
• The best way to back up your iCloud Photo Library is to download all its content to your Mac. Your entire digital library is probably huge, so you may need a Mac with a massive drive to handle the volume. Otherwise, back up your iCloud Photo Library to an external drive attached to your Mac.
• 在 Mac 上的“照片”中更改文件的储存位置 将照片和视频导入“照片”时，它们会拷贝到“照片”图库的“图片”文件夹中。如果您喜欢，您可以将照片和视频储存在“照片”图库外部（例如 Mac 上的某个文件夹或外置驱动器上），并且仍可在“照片”中进行查看。.

Photos in your System Photo Library are available in apps like iMovie, Pages and Keynote. You can also sync them to iOS devices and Apple TV via iTunes. And if you want to use your own images as your desktop picture or screen saver, the images need to be in your System Photo Library before you can select them in System Preferences.

If you have only one photo library, then it's the System Photo Library. Otherwise, the first photo library that you create or open in Photos will become the System Photo Library. If you have more than one library, you might need to designate a System Photo Library, so other apps can access the photos and videos you want them to use.

Follow these steps to designate a System Photo Library:

2020-4-1  To be completely clear, making a new photo library means none of the existing libraries images will be included in the new picture library, unless specifically added. This allows for completely different and unique collections of images. How to Make a New Photo Library in Photos for Mac OS X. Quit out of Photos app.

1. Quit Photos.
2. Hold down the Option key, then open Photos. One of the photo libraries is already designated as YourLibraryName (System Photo Library).
3. Choose the library you want to designate as the System Photo Library.
4. After Photos opens the library, choose Photos > Preferences from the menu bar.
5. Click the General tab.
6. Click the Use as System Photo Library button.

If you open a second or different library in the Photos app, and you haven't designated it as the System Photo Library, other applications will use photos from the original System Photo Library. Hold down the Option key when you open Photos to see which library is set as the System Photo Library.

iCloud and the System Photo Library

You can use iCloud Photos, Shared Albums and My Photo Stream only with the System Photo Library. If you choose a different library in Photos without designating it as the System Photo Library, the iCloud tab in Photos preferences is disabled:

If you designate a new library as the System Photo Library and then turn on iCloud Photos, the photos and videos in the new library will merge with those already in your iCloud Photos. If you want to keep the contents of your photo libraries separate, don’t turn on iCloud Photos for more than one library in Photos.

Summary

Merge Photos Library Mac

Download EaseUS iPhoto recovery software and apply provided methods here to recover deleted iPhoto Library with photos on Mac. If the attempt to restore iPhoto Library from time machine failed, don't worry and EaseUS Data Recovery Wizard for Mac is ready to help.

How can I recover accidentally deleted iPhoto Library on Mac?

'How can I recover deleted iPhoto Library on Mac? I need some suggestion or guidance. I feel so stupid because I accidentally erased my iPhoto Library to Trash and had emptied the trash securely a few days ago..

My friends told me that I can restore the deleted iPhoto Library from Time Machine. But I completely don't understand how to use this app on my Mac. Can anyone help me retrieve my lost pictures from the deleted iPhoto Library that I had empty securely from the trash plus guidance to activate Time Machine? I need those photos back.'

According to Apple's support community, when a user deleted iPhoto Library, there's still a chance to restore lost photos and even the app itself. Read on and follow the provided solutions you'll see how to effectively restore lost photos after accidentally deleting iPhoto Library. (Methods below also can be applied to restore deleted photos and Photos Library on the latest Mac computers to restore with installed new macOS.)

Part 1. Recover deleted iPhoto Library on Mac

It's easy to understand that your data always matters more than your apps and hardware. So your first step after deleting iPhoto Library on Mac should be restoring lost photos. And the best way is not to restore from the Trash.

Mostly, according to Apple's support community, when you delete the iPhoto Library from Mac, the chance to restore photos from the Trash is very small. Here are two methods that you can follow and restore deleted iPhoto Library with photos on Mac.

Method 1. Recover deleted iPhoto Library photos on Mac without Time Machine

If Time Machine was not running and you emptied the trash securely after deleting the iPhoto Library, it is impossible for you to perform Mac deleted recovery from Time Machine. If you can't recover deleted iPhoto Library on Mac from TM, you can try EaseUS Data Recovery Wizard for Mac for help.

Now that you’ve changed to the Steam library in the Application Support folder, you need to make a symbolic link to wherever you moved the new SteamApps folder. Move steam library folders mac.

EaseUS Mac data recovery software allows users to recover multiple types of files including the deleted iPhoto Library with simple clicks. It can offer you the most robust recovery capacity in all data loss cases. Now you can free download the trial version and evaluate what it can recover.

Keep Noted:

1. 1. This software is a trial version that you can use to scan and preview all lost photos without payment. You can pay to restore the lost photos after making sure this software indeed work.
2. 2. To avoid unexpected data loss, you should immediately start using Time Machine and backing up useful files after following the below photo recovery process.

Step 1. Select the location where your valuable photos were lost and click Scan button.

Step 2. EaseUS Data Recovery Wizard for Mac will start immediately a quick scan as well as a deep scan on your selected disk volume. Meanwhile, the scanning results will be presented in the left pane.

Step 3. By Path and Type, you can quickly filter the photos you've lost earlier. Select the target files and click Recover Now button to get them back at once.

After the restoring, you've restored the deleted iPhoto Library. One more thing that you should do to view your restored photos, which is to import the restored iPhoto Library into iPhoto Library folder on Mac:

Launch iPhoto > 'File' > 'Switch to Library' > Select the restored iPhoto Library > Click 'OK'.

Apple Photo Library

There, you can view and reuse your photos again.

Method 2. Recover deleted iPhoto Library photos on Mac from Time Machine

As many users know, Time Machine is a backup program. With it running on Mac if you deleted iPhoto Library, this application will create a backup of the deleted pictures. You can launch Time Machine application and go back to the time before you delete the iPhoto Library, then restore the deleted iPhoto Library with photos:

(This also works to restore lost Photo Library.)

Step 1. Connect your Time Machine drive to Mac and run Time Machine from System Preference.

Step 2. Scroll the timeline on the right side, click the desired backup (the date of your last backup).

Step 3. Navigate to the backup of your iPhoto library (by default, your iPhoto Library locates in 'Home/Pictures/iPhoto Library' folder), click to select it and click 'Restore' to retrieve your data.

The time of restoring iPhoto Library depends on its size.

Part 2. Rebuild iPhoto Library on Mac

When the photo recovery process completes, but you find the restored photos don't show up in iPhoto or iPhoto doesn't respond nor work on Mac, don't worry. All you need is to rebuild the iPhoto Library.

The other practical trick that you can try is to rebuild iPhoto Library on Mac computer. Here are the detailed steps:

Steps to rebuild iPhoto Library:

Step 1. Press and hold Command and Option keys and click on the iPhoto icon.

Step 2. When a dialog appears with rebuild options, check the options of rebuild iPhoto Library and click 'Rebuild' to confirm.

Steps to repair Photo Library:

On new Mac computers with the latest macOS such as Catalina, Mojave, you can repair Photos Library and make Photos application work on Mac again

Conclusion

The Mac data recovery software - EaseUS Data Recovery Wizard for Mac to restore lost photos after accidentally deleted iPhoto Library is easy and effective for every level of Mac users to apply and try. When you don't have Time Machine backups of lost data, you can also apply it to restore data on Mac without Time Machine.

The two methods provided for restoring deleted iPhoto Library will effectively restore your lost iPhoto Library. If you have further file recovery issues on Mac computers, follow our Mac file recovery resource page for further help.