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When Apple announced earlier this year that it would be discontinuing iPhoto and Aperture in favor of the upcoming Photos app for OS X, Adobe announced that it would be releasing a tool that would allow users to transfer their libraries into Lightroom.
That plugin has been released today on Adobe’s website and allows users to import photos, flags, ratings, keywords, and much more from the two outgoing apps into Adobe’s own offering. If you’d like to transfer your data to Lightroom, you can grab the importer for free from Adobe.
The full description of the plugin is below:

Description

Easily migrate your existing Aperture and iPhoto libraries into Lightroom with this Lightroom plug-in. The following data from your Aperture and iPhoto libraries will be imported into Lightroom:· Flags
· Star Ratings
· Keywords
· GPS Data
· Rejects
· Hidden Files
· Color Labels*
· Stacks*
· Face Tags*

*Color Labels, Stacks, and Face Tags will be imported as Lightroom keywords.
Since adjustments to photos made in Aperture and iPhoto can not be read into Lightroom, this plug-in will import both the original images and copies of the images that have adjustments applied.
This plugin requires Lightroom 5.6 or later and works on Mac only.


Adobe developing Aperture to Lightroom migration tool, releases step-by-step transition guide

Adobe streamlines transition from Aperture to Lightroom with built-in migration tool