Disclaimer: The 500px Lightroom plugin is now unsupported, meaning our CX Team (support) is no longer available for assistance or troubleshooting with old or existing versions. 500px cautions the usage of the 500px Lightroom Plugin as this product is deprecated and will eventually be removed.
First, download the Lightroom Plugin here. Now unzip the download and place the plugin file in your Applications folder on Mac, or Programs folder on Windows. You can now use the Lightroom Plugin Manager to install the new plugin.
Once it's installed, you can double click the Plugin on the left side of your Lightroom window to set it up. Click Login or Sign up and enter the information requested. After clicking Save, Lightroom will sync your photos from 500px.