iPhoto Library Manager

iPhoto Library Manager is a Mac photo library utility for organizing multiple iPhoto libraries, moving photos between them, and finding duplicates.

Fat Cat Software com.fatcatsoftware.iPhotoLibraryManager

What is iPhoto Library Manager?

iPhoto Library Manager is a macOS photo library utility built to help people work with more than one iPhoto library on the same Mac. It is designed for users whose photo collections have grown large enough that splitting them into separate libraries makes organization and browsing easier. The app lets you create and open libraries, add existing libraries to its list, browse photos and albums, and copy photos, albums, or events from one library to another. It also includes tools for merging multiple libraries while preserving albums and metadata, rebuilding a damaged library, and finding duplicate photos. Published by Fat Cat Software, it fits older iPhoto-based workflows rather than the current Apple Photos app.

Key features

  • Create and manage multiple iPhoto libraries from one place
  • Browse photos, albums, and events across selected libraries
  • Copy photos, albums, and events between libraries
  • Merge multiple libraries while preserving albums and metadata
  • Find duplicate photos and choose which copies to keep
  • Rebuild an iPhoto library when library data needs repair
  • Add existing libraries and organize shortcuts for quick access

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Safety overview

Status: Mostly safe

This is a legitimate photo-management utility from Fat Cat Software for older iPhoto workflows. Its access to photo libraries and image metadata is consistent with its purpose, but changes such as merges, duplicate cleanup, imports, or rebuilds can alter library contents. Before using it on an important library, keep a separate backup so you can recover if a library operation gives an unwanted result. Because iPhoto is a legacy Apple app, compatibility may be limited on newer versions of macOS.

Recommendation: Keep iPhoto Library Manager if you still manage legacy iPhoto libraries or need its merge, duplicate-finding, or repair tools. If you no longer use iPhoto libraries, you can remove it with little impact on a modern Photos-based setup, though older library-management workflows may stop working.

Common paths

  • /Applications/iPhoto Library Manager.app

Preference paths

  • ~/Library/Preferences/com.fatcatsoftware.iPhotoLibraryManager.plist

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