Connect the PowerTap craddle to the USB port on your Mac, and slide the PowerTap computer onto it, ensuring that it is firmly in place. Ensure that the device is 'awake' by pressing on of the buttons on it. The display should read 'connect'. Select 'Download Sessions' from the 'Add' menu, or click the 'Download' button on the Toolbar. Select 'USB <->Serial' in the 'Port' popup menu, and 'PowerTap' in the 'Device' popup menu. Click 'OK', and a dialog box will be displayed, showing the progress of the transfer.
Once the transfer has finished, a dialog box will open, showing all the sessions on the watch. Sessions shown in italics as session which have already been entered into your log file. To add sessions, click the checkbox next to the session, and click the 'Add' button. The sessions are then added to the log file for the current user