Adobe apps must store and retrieve license information on your computer. Occasionally, an app is unable to store or retrieve this information because of issues in the license storage on your computer. Follow these steps to resolve this issue.
Go toApplications>Utilities>Keychain Access.
In the upper-left corner, underKeychains, select login.
Remove the following entries. To remove them, right-click and select Delete.
Adobe User Profile Info
Adobe User OS Info
Relaunch the Creative Cloud desktop app.
OpenServicesmanager (press theStartkey and type Services).
In the list ofServices, right-click onCredential Manager.
Thank you for this information, I finished the first 3 steps, but couldn't find a way to relaunch the creative cloud. Then I just reinstalled a new creative cloud. But after installing it, there's a window popping up saying open creative cloud which never happens, and I can only find an application called "creative cloud helper" in my application list. I think right now I have another problem installing creative cloud.