I have successfully purchased, installed and registered Lightroom 6 on my Mac desktop as a stand alone application.
On the road and in the field, I use my McBook Pro, so I tried the to install Lightroom on it. No problem, until I tried to register. I enter my valid serial number (not signed in to CC) and I get a window saying: "We are unable to validate this serial number for Adobe Lightroom. Please contact Customer Support."
Seems to only way to get the program started is to use it as a CC application, which I don't want to do.
Why is it not accepting my valid serial number???
You have Light room 5 = Full version serial number & Light Room 6 = Upgrade serial number, please confirm the serial number that you are using.
The upgrade serial needs the previous serial number to validate it self.
I use the serial number I got when I purchased Lightroom 6.
Don't quite understand your answer. Do you mean I should re-install Lightroom 5??? "The upgrade serial needs the previous serial number to validate it self.' is too cryptic for my understanding.
With friendly greetings,
Let me know if the issue still persists.