I downloaded Lightroom 4, but it won't install on my Mac OS version 10.8.3

I get the following message when I try to install Lightroom 4:
The app’s authorization has been revoked
Although this app was signed by an identified developer, the certificate for the app has been revoked. There may be a problem with it. The app cannot be opened.
You should check with the Mac App Store to see if there is an updated version of this app, or check with the software developer.
I bought it from Newegg. Any ideas?

If you purchased from Newegg, im not sure why the Mac App store is involved. Did you have a previous version purchased from the App Store?
Is this an upgrade version or full version?
Have you contacted Newegg?

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