Hi. Just ran across the "correct" answer to my question re "Had CS6, tried to reinstall on new PC and couldn't find S/N" looking through email in my folder. Ultimately found S/N but still didn't work. Was told that Adobe sold batches of S/Ns to dealers who later sold them on eBay, and Adobe eventually disallowed same. The "correct" answer is copied below, and I wanted to bring up a couple points none of the previous responses did. Below is the "correct" answer:
That's a shame. You get what you pay for, I guess.
Goodbye & good luck with your future endeavors.
>dealer who later legitimately sold on eBay
Adobe sold blocks of serial numbers to businesses for internal use, not to dealers to re-sell
So those sales on an auction site were not legal
You're the only person to explain that. That IS obviously a valid reason for disallowing those purchases. My point about people hanging onto CS6 because they didn't want to rent software, and seeking out other software options for their needs, remains.
I understand that there are several reasons that people want to keep using CS6, but the simple fact is that it is from 2012 and Adobe stopped selling it very soon after subscription based sales started
While it may be possible to find an honest seller on ebay there are also a lot of fakes and/or volume licenses that are not allowed to be re-sold... with the further risk of buying a hacked version that will send stolen information to the hacker
On the Windows side it is still possible to use CS6 programs, all the way up to Windows 10 (sometimes with some extra work)
On the Mac side CS6 will not install at all on Catalina and forward, since Apple did not maintain any backward compatibility mode such as may be done with Windows 10
For photo/video editing Adobe has http://www.adobe.com/products/elements-family.html for a one time fee
For anything else that is in an Adobe subscription there are alternatives to be found... which of course will not work for someone who 'must' use Adobe programs due to project sharing with someone
But, back to the original subject, and for anyone else who reads this
NO dealer on ebay or any other site will have a serial number and a download that is legal... no matter what the dealer says about the source of the serial number(s) Adobe will, eventually, catch the illegal sale and the number will be disallowed
If buying from an individual, a serial number transfer is required
Transfer (selling or giving your software away) https://helpx.adobe.com/x-productkb/policy-pricing/transfer-product-license.html
-you may NOT sell or transfer an Education serial number
Extra steps that may be needed for Windows 10
Two ideas that MAY work to install and/or run old programs in Windows 10
-RIGHT click the program icon or EXE and select a compatibility mode in the pop up option window
-and/or select Run as Administrator to assign FULL Windows permissions
Extra steps that WILL be needed for Mac Sierra