Today’s OS X update, 10.9.3, has re-added the ability to sync contacts and calendars with iOS devices via iTunes over a USB or Wi-Fi connection. Apple had quietly removed this feature in Mavericks, presumably as part of the deprecation of OS X SyncServices, directing users to iCloud instead for syncing. It has returned in this latest OS X update, possibly due to pressure from users concerned about the use of cloud-based services, although it is unclear if Apple has returned to the prior SyncServices model or simply developed a new synchronization architecture for this purpose.