Econ Technologies (www.econtechnologies) has updated ChronoSync to version 4.5.3, featuring compatibility with the upcoming Mac OS X Yosemite.
ChronoSync can synchronize, backup or create bootable backups to most anything you can connect to your Mac, including folders on your Mac, other Macs, PC’s, and external drives.
Existing users can update for free. A demo is available for download. Registration for new users is US$40.