Apr 28, 2017 I just got a new Mac. I want to transfer or import my photos library from my old Macbook Pro to my new iMac. I copied a small library to my new Mac from my old Mac to see what happens but the Photos app isn't able to see the photos for some reason like it's empty even though its switched to that library. If you are a bit short of space on your Mac, here’s how to transfer your photo library to an external drive and store it there. How to copy the Photos library to a hard drive.
Even if you use iCloud Photos, it’s important that you always back up your library locally using one of the following methods:
Use Time Machine: After you set up Time Machine, it automatically backs up the files on your Mac. If you ever lose the files in your Photos library, you can restore them from the Time Machine backup. For more information about setting up Time Machine, see Back up your files with Time Machine.
WARNING: If a Photos library is located on an external drive, don’t use Time Machine to store a backup on that external drive. 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.
Important: If any of your image files are stored outside your photo library, those files (known as referenced files) aren’t backed up when you back up your library. Be sure to back up those files separately. To make it easier to back up all your image files at once, you can consolidate referenced files into your library. See Change where Photos stores your files.
Apple's photo management software for the Mac, Photos, has grown to be a fairly competent all-purpose storage locker. But as your photo and video library grows — and especially if you've taken advantage of iCloud Photo Library — you may find that your Photos library strains to fit on your Mac's hard drive.
While there are options to keep your Mac from running out of space, like optimizing your photo storage if you use iCloud Photo Library, it comes at a cost: Without a fully-stored Photos library, you won't be able to create secondary backups of your images and video. (And as good as iCloud has become, your photos and video are precious enough that they're worth keeping backed up in multiple places.)
There is an alternative: Moving your Photos library to an external drive (or creating an entirely separate library and syncing it with iCloud). Here's how to do it, and some reasons why you should — and shouldn't! — consider it for your needs.
There are a number of reasons why an external drive might make sense when you're working with Photos for Mac:
That said, there are some downsides, too. Here are some reasons you might not want to use an external drive:
Okay, so you've decided to move your Photos library over to an external drive. What next? If you already have an external drive, you can always use it for storing your Photos library (and save on cash). But if you're considering getting a new drive for this endeavor, here's what I suggest:
Want some recommendations for specific external hard drives? We've got those, too.
As with creating a new library, moving your library to your external drive is a multi-step process. Here's how to go about it.
Open a new Finder window. Don't close your previous window (open to your external drive), as you'll need it shortly.
Drag it to your external drive in the other Finder window.
Your library will begin to copy over to your external drive. Depending on the size of your library and speed of your drive, this can take anywhere from a few minutes to several hours, so be patient. Don't unplug your drive or turn off your computer during this process.
Before you open your copied Photos library on the external drive, you have to disassociate the library on your Mac from iCloud. (If you don't use iCloud Photo Library, you can skip these steps.)
Uncheck iCloud Photo Library.
Quit Photos.
Now, it's time to make your newly-copied Photos library your system default.
Click Use as System Photo Library.
Your external library is now set up to be your system default, but it's not currently connected to iCloud. If you use iCloud Photo Library and want to keep that connection active so that you can continually download items you've stored, read on. (Otherwise, you can skip this step.)
Click on the iCloud tab.
Once your library has fully synced and downloaded images, you can disconnect your drive; whenever you want to use your Photos library, you now need to connect your drive to your Mac.
A personal plea: Please, please, please make sure your library is fully copied and working on your external drive before you follow the steps below — once you've thrown away your original library, it's gone!
Select your old library.
Rename the alias to remove the 'alias' part of its name.
Now you have a direct link to your copied Photos library from the Pictures folder: This prevents your computer from accidentally creating multiple Photos libraries in case you forget to launch Photos with your external drive connected.
Note: If you're worried about accidentally creating libraries, you can always launch Photos by option-clicking on its icon in the Dock or Applications folder; this will give you the option of picking which library you'd like to launch.
Creating a new library on your external drive is a multi-step process. Here's how to go about it.
Before you create a new Photos library, you have to disassociate your current library as your system default. (If you don't use iCloud Photo Library, you can skip these steps.)
Click on the iCloud tab.
Quit Photos.
Once you've done this, it's time to create a new library.
Name your library.
You'll now have an empty library on your external drive. Next up: Making it your system library.
Click Use as System Photo Library.
Your external library has now been set up from scratch. If you use iCloud Photo Library and want to download all the items you've stored there to have an external backup, read on. (Otherwise, you can skip this step.)
Click on the iCloud tab.
Once your library has fully synced and downloaded images, you can disconnect your drive; whenever you want to use your Photos library, you now need to connect your drive to your Mac.
A personal plea: Please, please, please make sure your new library is live and working on your external drive before you follow the steps below — once you've thrown away your original library, it's gone!
Aug 11, 2017 There may still be salvageable data in your Photos library and you’ll want to ensure that every means available to recover it remains open. Anyway, if you’re happy with your backup situation and want to proceed with trying to repair your Photos library, the first thing you’ll need to do is quit the Photos. Back up the library in Photos on Mac. Use Time Machine: After you set up Time Machine, it automatically backs up the files on your Mac. If you ever lose the files in your Photos. Manually copy your library to an external storage device: Drag the Photos library (by default in the Pictures folder. Jul 26, 2018 If you go ahead with the repair, the system will display a progress bar while it chugs away. Depending on the size of the photos library and the speed of the Mac being used, this could take a few.
Select your old library.
Select Make Alias.
Now you have a direct link to your Photos library from the Pictures folder: This prevents your computer from accidentally creating multiple Photos libraries in case you forget to launch Photos with your external drive connected.
Note: If you're worried about accidentally creating libraries, you can always launch Photos by option-clicking on its icon in the Dock or Applications folder; this will give you the option of picking which library you'd like to launch.
Let us know in the comments.
Updated March 2019: Updated for macOS Mojave.
Serenity Caldwell contributed to an earlier version of this post.
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