To select all of the items in your library, go to the Library tab All Photos, select an item, then click Command-A. Choose File Export Export Unmodified Original. An export dialog appears. The 'originals' folder is an overhang from the older version, the 'Masters' is the new terminology. Don't change anything in the iPhoto Library Folder via the Finder or any other application. IPhoto depends on the structure as well as the contents of this folder. To get these files back on macOS, launch Photos, then open the Photos menu, choose Preferences, switch to iCloud and make sure Download Originals to Mac is selected. The Photos Library 'Masters' folder holds all your original image files. Screen capture by Brad Moon. Start copying the contents to a new location, one folder at a time. Make certain you are. A Mac that was upgraded to a new version of OS X that added the Photos app, however, can end up with what look like duplicates of their photo libraries. The first time you start up Photos after upgrading, your Mac will copy over your photo library into the new software (if you explicitly set up more than one old iPhoto library, you’ll have to.

1. Mac Photos Preferences
2. Photos Library Masters Vs Originals

Peter writes:

How do I backup the Photos Library so the folders remain organized in the external hard drive just like I have it in the Mac?

I read this question and almost replied, “That’s easy!” But the more I thought about it, the more I realized it’s an intricate question, because of how Apple has its own organizational structure that’s invisible in the Photos Library, independent of how you sort images in the Photos app. And because there are several possible answers to the same question.

The first question is, really, what is your ideal outcome for this copy on the external drive?

• An exact duplicate of the library. Quit Photos, if it’s active, find the Photos Library, and copy it. The Library includes 100 percent of everything that Photos needs. Done. But that’s probably not what Peter was asking.
• Copy the file structure of the folder in the Photos Library. You can Control-click the Photos Library and select Package Contents, and then access all the folders that form the library. However, Photos organizes images and video into chronological folders— nested by year, month, and day—inside Masters (originals) and Previews (modified versions). This is probably not what Peter wants, either.
• Copy Moments, Albums, Smart Albums, and other organizational structures in the Photos app. Unfortunately, while Apple lets you select multiple images to export at once (via File > Export), you can’t export these album and other structures as folders. You could open albums one at a time, select all the photos inside, and then export them to a folder you create with the same name, but that’s manual and tedious, and doesn’t automatically update.

I’ve recommended PowerPhotos ($30) before, a utility by Fat Cat Software that can merge, de-duplicate, and selectively copy Photos libraries, along with other tasks.

But it can’t (yet?) provide that sort of clean export operation Peter wants.

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With the upgrade to Photos, many Mac users have been left with a duplicate iPhoto library on their Macs. Here’s how to delete iPhoto library and clear out some clutter.

iPhoto used to be the standard photo editor and photo management system on Macs, at least for the average computer user. Like it or not, however, that all changed when Apple first introduced the software, nearly a year ago. If your Mac came from Apple with Photos already installed, you don’t need to worry about old iPhoto libraries.

A Mac that was upgraded to a new version of OS X that added the Photos app, however, can end up with what look like duplicates of their photo libraries. The first time you start up Photos after upgrading, your Mac will copy over your photo library into the new software (if you explicitly set up more than one old iPhoto library, you’ll have to copy them over yourself). It doesn’t go back and delete the old one, though.

Here’s where things get a little bit confusing: you don’t actually have two copies of your photos. Thanks to the way OS X (the software that powers your Mac, like Windows powers a PC) works, your pictures aren’t actually stored in those libraries. Instead, they’re stored somewhere else on your hard drive, and each library has what Apple calls a “hard link” to the pictures. As a result, each library can access the photos, but store separate information about them. You can delete either library safely; only if you were to delete both libraries would you lose access to your pictures.

While having a second copy of your photo library doesn’t take up that much extra space on your computer, it can still be confusing – first of all, each library reports that it’s a certain size, which can make it difficult to figure out how much room is left on your Mac. Additionally, if you need to back things up, it can be hard to figure out where your files are.

Still with us? Let’s recap:

• if you upgrade your Mac from iPhoto to Photos, you’ll get a second photo library
• if you had multiple iPhoto libraries (you would know if you did), you’ll need to copy them into Photos manually
• the libraries each link to a single copy of your photos, rather than storing each photo twice
• it can appear that your libraries are taking up more space than they are, thanks to the way hard links work
• you can safely delete either photo library – only if you delete both of them will you lose access to your photos

How to delete iPhoto library on your Mac

Now that you understand why you might want to delete an old iPhoto library, and why you don’t necessarily have to, let’s talk about how to actually do it.

Before you do anything like this on your Mac – that is, delete something potentially important – you should back up your software with something like Time Machine.

Read: How to Backup Your Mac with Time Machine

That way, if you accidentally delete something important, or something else goes wrong, you can always roll things back to how they were when you started. This is really easy, and there’s nothing to be concerned about; it’s just good practice to back things up (and keep them backed up) before you muck about in your computer.

First, you’ll need to open a Finder window: you can do this by clicking on the Finder icon (it looks like a square face) on the dock, or by clicking on your Mac’s desktop background and hitting ⌘+N (Command + N) on your keyboard.

Mac Photos Preferences

Next, look at the left-hand column in the new window. You’ll see a list of locations around your Mac; find the one that says Pictures and click on it. You’ll be taken to that directory, which contains libraries for Apple’s image-related apps (Photos, iPhoto, Photo Booth, etc).

In the list of files on the right, scroll down and look for your iPhoto library – it’ll be a little iPhoto icon, and the name will read, unsurprisingly, iPhoto Library. Don’t worry about accidentally deleting your Photo Booth or Photos libraries; you’ll be able to see which one is which.

To actually delete the library, you can do one of three things:

1. Click on the iPhoto Library listing, and without letting go of your mouse or trackpad button, drag it until it’s over top the Trash icon on your dock. Once you’re on top of the Trash, let go.
2. You can select (click on) the iPhoto Library, then right-click on your mouse or Trackpad (Apple will call this Secondary Click in your Mouse or Trackpad settings). A new menu will pop up; find the entry that says Move to Trash and click on it.
3. Finally, you can also delete your iPhoto Library by clicking on it and hitting ⌘+Delete (Command + Delete) on your keyboard.

Read: How to uninstall apps on Mac OS X

Now that you’ve gotten rid of your iPhoto library, it makes sense to completely uninstall iPhoto – that way you won’t accidentally create a new iPhoto Library and have to repeat all these steps. It’s as simple as opening up your Applications folder, and deleting iPhoto (using one of the three steps we just discussed). For a more in-depth look at how to uninstall apps on your Mac, be sure to check out our guide above!

Photos Library Masters Vs Originals

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