ChronoSync - 4.6.4

Version: 4.6.4
Mac Platform: Intel
Includes: Pre-K'ed

OS version: OS X 10.8 or later
Processor type(s) & speed: 64 bit
RAM minimum: n/a
Video RAM: n/a

Now compatible with El Capitan.

Detailed release notes @ http://www.econtechnologies.com/chronosync/notes.html

- Mount image and install

Notes:
Block outgoing connections (Little Snitch, Hands Off!.. or something like that)
Disable automatic update checks

↑ Info
ChronoSync easily synchronizes or backs-up files and folders in a variety of ways.

Synchronize files between folders, hard drives, removable media, laptops, file servers, or any computer, not just a Mac. Features include:

Fully customizable toolbar:

All synchronization settings are stored in separate, self-contained, double-click- able documents that can be run or modified at any time.
Synchronize files in any direction or bi-directionally.
Establish simple, intermediate, or advanced rules to include or exclude files by name, size, date, extension, plus other more advanced options.
Compare files before and after synchronizations to see the status of every file.
Run trial synchronizations to check results before committing.

And much more....

More info: http://www.econtechnologies....ages/cs/chrono_overview.html