In looking at a solution to sync photo/pictures folders between laptop and desktop macs, it seemed chronosync was the better choice compared to CCC or SuperDuper. I don't so much need drive cloning as need folder level sync. I've been demoing chronosync for a couple weeks and it seems to do what I want. However I just discovered they license by computer not by user unless I've misunderstood something. I'd much prefer the flexibility of being able to initiate a sync from either side rather than having to always launch from one computer. So I'm opening up my search to see if there are other options. What are you using to keep a couple folders synced between two computers? Folder sizes are in the tens of gigabytes and the ability to dissect packages is important (I use Lightroom and Aperture). Thanks.