Run all available uninstallers in Applications/Utilities/Adobe Installers.
To recover from the migration and install Creative Suite 5 please complete the following steps, Donnas27069639:
This can cause additional complications for installing Creative Suite 5 successfully. In addition, you also mentioned that you migrated your applications to the new iMac. It is an education license so the retail installation files available at Download Adobe Creative Suite 5 products will result in the serial number being invalid. The Master Collection CS5 for Mac serial number is still valid.
You mentioned you purchased Creative Suite 6 from eBay? Were you still attending an educational institution at that time? Regardless you are welcome to use the process listed in Invalid or revoked serial numbers to report the details of the individual or organization who sold you Creative Suite 6 Design and Web Premium. The Creative Suite 6 Design and Web Premium is not valid as it was not designed to be sold except through educational channels. You do have two Creative Suite software titles registered under your account. This is why Illustrator is launching successfully. Donnas27069639, I am showing that you currently have an active membership in Illustrator CC.