I was kicking around yesterday looking for a decent Exif viewer for the Mac, I found one or two but they didnt support extraction of GPS data. Turns out my time was wasted and OSX supports and reports Exif data including GPS location data.
Step 1. Open your image in Preview mode.
Step 2. Cmd-i to Open Inspector
Step 3. Click the 'i' tab and select Exif or GPS button
It even has a 'Locate' button to fire the coordinates up in Google maps. Simple and brilliant.
Although there isn't an export feature, the dialogue does allow you to copy and paste the data out into a text program.
Gotta love your Mac!