In order to transfer data between your Casio device and your Mac computer, you need to download and install Data Manager 6.1. It is fully compatible with all major Windows platforms and Mac OS 10.5, 10.6, 10.7, 10.8 and 10.9. After you install it on your computer, launch it, connect the device using the USB cable and transfer the desired files. If you have issues, you can check the user guide for your device.