Downloading DeviceSync 1.2 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. The actual developer of this free software for Mac is Yep.
From the developer:
DeviceSync is an easy to use application that allows you to synchronize your calendar between iOS and OS X with USB. On OS X 10.9 (Mavericks), calendar and contact synchronization between iOS and OS X no longer works with USB. If you do not want to use iCloud for synchronization, this litte app may provide a workaround.