I am using Acrobat 8 professional on an old MacPro in OSX 10.4.11. Everything has been working great. I haven't changed anything, said anything, etc., in the years (and Yes, I have a mac and software sitting next to her most recent). All of a sudden is Ac

Suddenly, it does not open and ask my serial number, which is good - it is part of the original CS3 Design Premium package of the software. But when I enter the number it will fail to recognize him-said it is not a valid number. What the devil? Any ideas?

Hi nancig60380975,

Incorrect message of serial number for Acrobat 9, you may need to consult the doc KB link mentioned below:

https://helpx.Adobe.com/Creative-Suite/KB/error-entered-invalid-serial-number.html

Let me know if it helps.

Kind regards

Ana Maria

Tags: Acrobat

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