HT2484: Mac 101: iSyncLearn about Mac 101: iSync
Currently Being ModeratedDec 18, 2013 4:18 PM (in response to iubire)
same story as with iSync under Lion; you need a copy of the iSync.app that came with your copy of Snow Leopard to the Applications folder under ML.
Remember that this is a procedure not officially supported.
As I have a rather old non-Apple cell phone I rely on this workaround in order to have my calendar and contacts synced - and it works fine for me to this day.