Download Catapult
The free trial is fully functional for 30 days with complete interactive and batch processing modes.
You can use a license key for Catapult or Catapult Lite (which does not have batch processing functionality) without needing to download & install again.
for Aperture 2.1 and Mac OS X 10.5.
Once downloaded, you’ll get a disk image with an installer package.
If the Installer does not open automatically,
double-click the disk image to mount it, then double-click the “Install Catapult” package to run the Installer.
Once installed, the next time you launch Aperture,
Catapult will be available in Aperture’s Images > Edit With > Catapult menu
when you select an image.
Buy Catapult
You want it, right? Go buy it!
- Catapult
-
from the 
store for $49 CAD.
- Catapult Lite
-
from the store for $19 CAD.
- Catapult Lite upgrade to Catapult
-
from the store for $35 CAD.
Updates
The latest version of Catapult is 1.0.5, which improves Snow Leopard compatibility. You can download it from the link above.