I have a tractor scratch pro 2 license. Installed on my old macbook. I bought a new macbook and installed traktor and native access , I enter the serial number and get the message successfully and then I start the tractor and always get a screen DEMO / BUY / ACTIVATE Also, I don't see the scratch pro 2 tractor anywhere in native access.
Traktor Pro 2 was discontinued years ago and is not supported on macOS 11 or later, so it will not show up in Native Access. You'll need to buy the upgrade to Traktor Pro 4.