Serial number don't recognize for Acrobat 9 Pro (in CS4 MC) after update to 9.5.5

Hello

My CS4 Master Collection works on MAC OS El Capitan, except Acrobat 9 Pro. Judgment of the Acrobat 9 Pro at the start.

I do the successive updates of 9.1 until 9.5.5 (23 updates). Acrobat now accept to start, but he asks me the serial number, and when I type the serial number of my CS4 Master Collection package, it is not recognized.

Help, please.

Hi christophel79691303 ,

Please see this KB article:- https://helpx.adobe.com/creative-suite/kb/error-invalid-serial-number-acrobat.html

https://helpx.Adobe.com/Creative-Suite/KB/invalid-serial-number-CS4.html

I would like to know if it works.

Kind regards

Christian

Tags: Acrobat

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