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Mar 18, 2020  An iMovie library holds all the media and data used to make movies in iMovie. If your iMovie library is large and you want to free up storage space on your Mac, you can move your iMovie library to an external drive. Before you move an iMovie library, it's a good idea to back up your Mac. Jan 12, 2020 You can access the hidden Library folder without using Terminal, which has the side effect of revealing every hidden file on your Mac. This method will only make the Library folder visible, and only for as long as you keep the Finder window for the Library folder open.

An iMovie library holds all the media and data used to make movies in iMovie. If your iMovie library is large and you want to free up storage space on your Mac, you can move your iMovie library to an external drive.

Before you move an iMovie library, it's a good idea to back up your Mac.

Moving your library to an external hard drive doesn’t affect any iMovie Theater content you have moved to iCloud.

Prepare your drive

You can store your library on an external storage device such as a USB Thunderbolt drive formatted as APFS or Mac OS Extended (Journaled). Apple doesn’t recommend storing iMovie libraries on external storage devices like SD cards and USB flash drives, or drives shared on a network.

You can’t store your library on an external drive or other disk used for Time Machine backups.

Move a library to an external storage device

  1. Quit iMovie.
  2. Select your external drive in the Finder, then choose File > Get Info.
  3. If the information in Sharing & Permissions isn’t visible, click the triangle , then make sure the 'Ignore ownership on this volume' checkbox is selected. If it's not selected, click the lock icon to unlock it, enter an administrator name and password, and then select the checkbox.
  4. Click your desktop to make sure that you’re in the Finder, then choose Go > Home from the menu bar at the top of your screen.
  5. Open the Movies folder, then drag the file named iMovie Library to your external hard drive.
  6. When the library file is finished copying to your external drive, double-click the library file on the external drive to open it in iMovie. If an alert appears asking you to give iMovie access to a removable volume, click OK.
    If you clicked Don't Allow, in the Finder choose Apple menu  > System Preferences, click Security and Privacy, then click Privacy. Click Files and Folders in the sidebar, then select 'Removable Volumes' under iMovie.
  7. Make sure the library you moved contains all your media, then drag the original file from your Movies folder on your Mac to the Trash.

If you disconnect the external drive

When your external drive is connected to your Mac, the library you moved to the external drive opens automatically in iMovie. If you disconnect the external drive containing the library, iMovie opens to a new, empty library created in the Movies folder on your Mac. iMovie automatically saves any projects you create and media you import in the new library.

If you want to open the library you moved to an external drive, you can open it after you reconnect the external drive. You can then move clips, events, and projects between libraries.

I've had a multi-Mac household pretty much since college, rocking a laptop and desktop in addition to miscellaneous iOS devices throughout the years. Dropbox and iCloud sync made most of the pains of using several Macs disappear, but iPhoto was always a problem. My laptop is tiny! My iPhoto library, not so much.

Thankfully, Photos for Mac — paired with iCloud Photo Library's Optimize Storage feature — makes working with and syncing multiple Macs a breeze. Here's how you can do it.

How to use Photos and iCloud Photo Library with multiple Macs

Here's a quick, simple breakdown on setting up your Macs to support Photos and iCloud Photo Library.

I recommend starting with your biggest iPhoto library; it'll usually be on your desktop Mac. When you open Photos for the first time, your library should import automatically; if it prompts you to create a new library, your Photos library may be stored in another location on your Mac, and you may need to manually open it.

Once you've imported your biggest library on your Mac, make sure iCloud Photo Library is turned on and syncing. You can do this by following these steps:

What Is Mac Video Library For Free

  1. Launch Photos on your Mac.
  2. Click Photos in the menu bar.
  3. Select Preferences (or do this quicker by pressing ⌘,).

    Source: iMore

  4. Click on the iCloud tab.

    Source: iMore

  5. Check off the box for iCloud Photos.

    • You can also check off the box for Download Originals to this Mac if you have the space.
    • You can check off Optimize Mac Storage to save space on your Mac by only saving a percentage of images and video locally — the rest will be thumbnails that you can click on to download when you want to.

    Source: iMore

Now, open your other Mac, and launch Photos. If you have an iPhoto library on that secondary Mac, follow the same steps as above — import your library, then turn on iCloud Photo Library. If you have duplicates of the same photo on each computer, iCloud should automatically resolve those conflicts when it syncs, providing you with just one version of your photos when the sync process finishes.

Move

If you don't have an iPhoto library on your secondary Mac, create a new library in Photos and turn on iCloud Photo Library. If you want to save storage space on this secondary Mac, make sure Optimize Mac Storage is selected: This will save a certain percentage of images and video locally to your device, while providing thumbnails of all the others for you to download at your leisure.

After you've set up all your Macs with Photos and the sync process has finished, you're now good to go. From here on out, any time you add photos, they'll sync to every computer you've set up with Photos.

What syncs, what doesn't sync

What

Photos for Mac syncs a lot more than just your original photos and videos. According to a support document on Apple.com, here's what else you should expect to see sync:

  • All folders and albums
  • Smart Albums
  • Keywords
  • Memories
  • Searchable keywords
  • Key photo selections

There are a few things iCloud Photo Library won't sync, however. Here's Apple's list:

  • Books, cards, calendars, and slideshows
  • Keyword shortcuts
  • Unused keywords
  • Last imported album on the Mac in question
  • Names and faces in the People album

For those not using iCloud Photo Library

If you've chosen not to enable iCloud Photo Library, Apple still offers you free syncing of your last 1000 photos via My Photo Stream, which doesn't count toward your iCloud disk space.

See Library On Mac

This will sync and download images you've imported or taken on other devices, but you won't have the option to optimize your storage or sync your albums.

Octoober 2019: Updated for macOS Catalina.

Mac Show Library

Serenity Caldwell contributed to an earlier version of this guide.

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Mac Video Player

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What Is Mac Video Library Software

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