I send a message to Blackberry support regarding my probleme. Here is the answer:
Thank you for contacting BlackBerry Customer Support.
The device you are trying to synchronize with uses new high-speed USB technology. PocketMac currently does not support this new technology. A future release of PocketMac will allow for high-speed USB support.
If you have any questions or comments, feel free to contact us.
Thank you again for contacting us Murat.
BlackBerry Customer Support
Research In Motion Limited "