Navigate to http://www.adobe.com/products/digitaleditions/.
Scroll down the page until you see the option to install the software and click the install button.
The Adobe Digital Editions Downloader begins downloading the install files. After the download is complete, the installer launches automatically.
Click Continue to begin the installation process.
Select the destination for the drive where you want to install Adobe Digital Editions. Digital Editions only installs on the drive where Mac OS 10 is installed. Once you have selected the destination, click Continue.
Click Install to begin the installation process.
Mac OS X asks that you authorize the installation. Enter an administrator account name and password to authorize the installation.
Click Close after the installation is complete.
The first time you open Adobe Digital Editions you are asked to complete the Setup Assistant. For more information regarding the Setup Assistant, see Digital Editions – Setup Assistant Walkthrough.
If you have difficulties with the installation process, see Can’t Install Adobe Digital Editions
Install, Digital Editions, Mac OS X, Mac OS 10; cpsid_90215