Try below steps
Click on Finder and then hold Command + Shift + G keys on your keypad
It will open Go to folder window, type exactly ~/Library and click on Go ( make sure to open ~/Library not /Library, there will be two Library folders )
Then open Application Support
Right click on Adobe folder and open Get info
Under sharing and permission click on lock icon and unlock it
Click on symbol and Add Administrator and your current user name ( if not added )
Then give read and write permission to user name, admin, system and every one
Then click on Gear icon and select 'Apply to Enclosed
Click on lock icon
Try to install Creative Cloud App.
