don't know why but the only way as far as I know to transfer anything to the V600 on a Mac is via Bluetooth. I bought a USB Cable as well but this was a no go. So I bit the bullet and invested in a USB Bluetooth dongle. The only limitation is that you can't transfer games but everything else is fine.
There are a few programs you might be interested in.
One is GSM Remote X with which you can:
Read all available standard phonebooks
Sending long SMS via phone
Export & Backup all standard phonebooks
Editing of the SIM and mobile phonebook is a three click task
Very powerful but easy to use import function
Drag & Drop contacts via vCard standard
(ensures easy sync with Apple's Address Book, Entourage X and Palm Manager 4)
Extensive use of Balloon help
Support for a wide range of different mobile phones
(all Bluetooth or IrDA compatible GSM mobile phones should work)
you can find it here:
http://www.versiontracker.com/dyn/moreinfo/macosx/10604
and the other one which is freeware BluePhoneMenu:
Incoming Call Notification Options: visual and audio alerts, dialog boxes, menu bar messages, and now even pause iTunes!
Recent Call List: including the callers name, the time of the call and the device that received the call.
Current Status of Connected Phones: including signal strength, battery power, silent mode, message alert, off-hook and roaming (not all phones support all features).
Address Book Integration: looks up caller's name if phone is unable to report it.
Support For Multiple Phones: distinguishes which of your devices a call was received on.
You'll find here
http://www.reelintelligence.com/BluePhoneMenu/