Lightroom 4 purchased through Apple App store does NOT have a serial number - cannot upgrade to lightroom 6
I am trying to upgrade from Lightroom 4.4 to Lightroom 6 on a Mac running OS X (Lion). I have purchased Lightroom 6 as an upgrade (as I am running Lightroom 4). The Lightroom 6 installer continues to indicate that it cannot find a "qualifying product" and asks for a declaration of the Lightroom product installed and its serial number. I am currently running Lightroom 4 purchased through the Apple App Store in 2013; according to all the information I can glean regarding this product... it does not have a serial number (if it was purchased through the Apple App Store). Does anyone have an idea on how to supply a valid serial number for the Lightroom 6 installer?
iMac running OS X 10.9.5
Adobe Lightroom 4.4 (purchased in 2013 through Apple App Store)
Adobe Lightroom 6 (purchased online as an upgrade from Adobe Lightroom 4.X)
Any help would be appreciated.
Thanks,
Bruce
