LG enV VX-9900
Bluetooth exchange with a MAC!
Go to your system preference and click on the Bluetooth Icon. Under devices, select "Set-Up New Device." Make sure to set the phone to discoverable mode so that the iMac can find it.
Once it's all set up, you can enable your Mac to show the Bluetooth icon (status) on the menu bar on the finder. From there, select "Send File." You can now drag and drop files between your iMac and your phone (which includes your internal memory and your flash card if you have one).