Q: aperture asking for serial number

Hi Justin,

see Frank Caggiano's post here:

Re: Why does Aperture "lose" registration info?

Regards

Léonie

Try Apple Customer Support at 1-800-SOS-APPL.

HTH

-Allen

There should be.

How did you look for the file? In MacOS LIon the System Library is hidden by default.

Use the Finder menu

     Go -> Go to Folder

and enter /Library/Application Support/ProApps

to disclose the Folder

How did you install Aperture?  Did you upgrade to 10.7.3 or is this a new system? If not new what did you upgrade from?

How did you install Aperture on the current system?

You should re-install Aperture from the original media. Apple recommends that Pro Apps like Aperture be installed from the original media. While installing from backup will work in many cases occasionally you can get weird problems if you do.

While this isn't  guaranteed to fix your problem it will eliminate one  very possible cause.