how to get CS6 onto new computer

[TRphoto11]

Hello,

Years ago, I purchased CS3 and still have the disc. In 2012, I upgraded to CS6 which was a download. Needed to purchase a new computer today. I was able to get the CS6 disc icon on the desktop of the new computer. However, when I try to install it, an "invalid serial number" message pops up even though I still have the original box. The CS6 serial number was also tried just in case.  I was understanding that adobe will allow up to 2 computers to use the software. Can anyone assist me in getting the program on the new iMac?

TIA,

Theresa

[Test Screen Name · Accepted solution]

CS6 will first need the CS6 serial  number.

Then it will ask for a qualifying serial number (since it's an upgrade) and you enter the OLD serial number.

Be sure it's compatible with the system on your new computer, CS6 is old and out of support.