From Adobe:
As promised in a blog post here, we are proud to introduce the Aperture and iPhoto import plugin for Lightroom 5. The plugin allows Aperture and iPhoto customers to migrate their images and key metadata (such as keywords, events, project structure) into Lightroom catalogs in a seamless way.
The plugin is available for download here and please follow these instructions to install the plugin:
- Ensure that you’re using Lightroom 5.6. You can check your Lightroom version by going to Help->System Info inside Lightroom. If not using Lightroom 5.6, please update to the 5.6.
- Download the plugin zip file to a known location (such as your desktop)
- Double click on the downloaded zip file to extract it.
- Navigate to the Users//Library/Application Support/Adobe/Lightroom folder. Please note that the Library folder is hidden by default and that you will need to hold down the Option/Alt key to make it visible.
- Check to see if there is a Modules folder. If not, please create this folder.
- Copy the extracted aperture_iphoto_importer.lrplugin file to the Modules folder.
- Start Lightroom.
For Aperture Customers: click on File -> Plugin Extras -> Import from Aperture Library and follow the prompts.
For iPhoto Customers: Click on File -> Plugin Extras -> Import from iPhoto Library and follow the prompts.
Download link -> aperture_iphoto_importer