1. Insert the DVD in your drive, and follow the on-screen instructions. If the installer does not launch automatically, double-click DVD Volume: Lightroom 6Install Lightroom 6 (Windows) or Adobe Photoshop Lightroom 6.pkg (Mac OS) at the root level of your disk to start the installation process.
2. If you downloaded the software from the web, open the folder and double-click Adobe Photoshop Lightroom (Windows or Mac OS), and then follow the on-screen instructions.