There are multiple reasons to move the Photos Library away from its default location, with the primary reason being to free up a Mac's storage. Images and videos can quickly consume storage, especially for prolific photographers shooting RAW files, so moving the library to an external drive can be the best option for those with internal drives that are close to their capacity limit. Outlook for mac calendar categories.
May 8, 2018 - Here's a troubleshooting guide to help get your external hard drive or flash drive. Launch the Mac App Store app and head to the Updates tab.
Putting the library onto external storage also provides the option of sharing the library with others directly, by disconnecting the drive from the host Mac and plugging it into another. This is also useful for those who wish to use the same library across multiple desktops, like an iMac and a MacBook Pro, if they need to regularly access and change the held files. Pre-move Backup Before attempting any file transfers, it is highly recommended to make backups of all images, as there is always the possibility of file corruption or another mishap, and keeping a backup is always a good idea for just these occasions. An up-to-date Time Machine backup is ideal, but it is best to make sure the external or remote drive used for the backup is different to the one you wish to use for the Photo Library storage itself. It may also be worth using cloud storage services to hold the images, such as Apple's own iCloud Drive, Dropbox, and Google Drive.
It might also be an idea to try out iCloud Photo Library, a service that automatically uploads your photographs to iCloud, which can be shared to iOS devices and other Mac desktops using the same Apple ID. Finding the Folder Before you can make the move, you need to find where the Photo Library is actually located. In most instances, it should appear in the Pictures folder of your Home directory, labelled as ' Photos Library,' potentially alongside other similar libraries for Photo Booth and iPhoto, the predecessor to Photos. In the event it isn't at the default location, you can find it by opening up the Photos app, clicking Photos in the Menu Bar, then selecting Preferences. At the top of the General section will be a line marked Library Location, which will show where it is located, as well as an option to Show in Finder, which will spawn a new Finder window at the right directory. Importing from iPhone First, connect your iPhone to your Mac with a Lightning to USB charging cable. 
A popup will ask if you want to trust your computer, tap 'Trust' and enter your passcode. Now open Photos on your Mac, where your iPhone will appear under the Devices tab on the left side of the app. From here, you can browse through all of the photos or video in your iOS Camera Roll. At the top of the page, click on Library, and you can choose to make a New Album for the import. If you wish to erase the photos off of your iPhone after importing, check the box below the Import button before clicking it. If you chose that option, you will see your photos being deleted off of your iPhone in real-time after importing is completed.
Your iPhone photos are now successfully backed up onto your Mac. The Move If it is still running, quit Photos by selecting Quit Photos under the Photos Menu Bar, or by pressing Cmd+Q. Connect the external drive that you wish to use for storing the library, and once it appears on your desktop, drag the Photos Library away from its current location within the Finder and on top of the external drive icon. If you want to place the Photos Library in a specific place within the new drive, open the external drive in a second Finder window, navigate to the correct directory, and drag Photos Library to the right place.