Can I download raw images from my Panasonic Lumix DMC - FZ45 to my iMac using Aperture3 ?

If the camera is not on the list then Aperture will not be able to handle the RAW images from the camera.

It's surprising as this is a relatively old camera, so if it's not in Aperture by now I would tend to think it won't be included. You could download the trial version and see what happens just to make sure.

One other thing, you could convert the RAW images to DNG using the Adobe Camera Raw and DNG Converter for Macintosh and then import those.

regards

The way that would require no additional software would be in convert all your images saved them into one folder and then import that folder into Aperture.

It would also be possible to import using a hot folder. Google Aperture hotfolder or else have a look at the Automator, there is a hotfolder action in there.

Basically with a hotfolder any image file placed into the folder is automatically imported into Aperture. Cuts down some work during import but requires more work upfront to set up.

regards