I have Master Collection 5.5 which purchased years ago and have been using on my 2009 Macbook Pro. I just updated my Mac to a new Macbook Pro, and tried to install my Adobe Creative Suite. I get a THIS SERIAL NUMBER IS NOT VALID FOR THIS PRODUCT error when I try to enter my serial number. I have tried to call and search adobe everywhere, and have not found a solution. I own a company and have several employees using the Creative Cloud memberships, but am happy with my CS 5.5 and do not want to pay for something I do not need. Adobe - please tell me how to gain access to my product.
Perhaps you have exceeded your maximum of two activations. If that is the case, yiou need ti deactivate at least one of them.
In any event, you need to contact Adobe customer service directly.
Unfortunately, only Adobe customer service can assist you with your issue. These are user forums; you are not addressing Adobe here.
Click on the link below, and after that click on "Still need Help? Contact us."
Then on the next page, click Chat
There is also a phone option.