Summary: Have not been able to get this to work yet beyond playing one song. I reformatted the disk twice as per instructions. I contacted Finis and they created a ticket for me to send it back. I had to pay to ship it to them and send it overnight. That was three weeks ago and have still not heard back from them. It sounds like there are challenges when you are syncing with a Mac. Not impressed, because still don't have a product that works.