Step 1)
Launch Activity Monitor and "Force Quit" all the process related to Adobe like Creative Cloud, CoreSync, AAMupdater, AAMupdater notifier, Adobe Crash demon , PDAPP, install , setup... from Activity monitor.
Step 2)
Trash Adobe Application Manager folder from Applications>Utilities.
Step 3 )
1) Right click on Finder icon and select "Go-To Folder" option.
2) You will get a text box, type-in below command and then hit 'Return' key.
/library
3)Then navigate to Application Support>Adobe.
Open Adobe folder and rename OOBE folder to OOBE-old.
Step 4)
Click on the below link and download Adobe Application Manager and install the same :
http://download.adobe.com/pub/adobe/creativesuite/cc/mac/ApplicationManager10.0_all.dmg
Once the installation process is completed, installation box will disappear, then open Application folder and locate Adobe Application manager launch icon , double click on it and update .
Once the update is completed. Try to install CS6 apps again.