Q: Migration issue with Aperture 3.4.3

Apple can help you here. But they will need to be convinced you have a legitimate license to Aperture. Can you find purchase receipt for Aperture 2?

Is the original system still running? You might be bale to use the serial number that shows up when you do Aperture->About Aperture.

Not sure what shows up there in an upgrade situation.

I just checked mine. If Aperture 3 was an upgrade, the About Aperture box only shows the upgrade S/N. You still need to find the Aperture 1 or 2 S/N to do a clean install.

Ah to bad, thanks for checking it was worth a shot.

To convince Apple to send you a replacement serial number, see this article on what constitutes a proof of purchase:

Pro Application Replacement Serial Numbers

Regards

Léonie