I just did an upgrade of CS5 Master Suite to CS6 Master Suite. I first did an uninstall on CS5. Then I installed CS6. Every other application in CS6 works fine except DW. It starts, bounces the icon once or twice and then quits. I checked the folder permissions under ~/Library/Application Support/Adobe/Dreamweaver CS6 and they are fine (R/W for me and staff)
Any ideas would be appreciated.
I had the exact same problem - however my Dreamweaver wasn't even creating prefs - Adobe Live Chat helped me solve it.
Create a new Admin Login User in your System Prefs>Accounts.
Restart with this new Admin User.
Dreamweaver should now start up and create prefs - User>Library>Application Support>Adobe>Dreamweaver 6
Copy the Dreamweaver 6 Folder and paste somewhere on your HD that you will remember (eg Applications Folder).
Restart with your normal User Account.
Move the Dreamweaver 6 Prefs Folder into your User>Library>Application Support>Adobe folder
Dreamweaver should now start up using these prefs.