I was having similar problems with my Samsung HW-H551 (H550):
MacBookPro would detect the soundbar via Bluetooth, but when pairing/connecting it would connect for a few seconds before disconnecting.
I fixed this by navigating to the Samsung soundbar support pages HERE: http://www.samsung.com/us/support/video/soundbars
I searched for the model of soundbar and then download the firmware upgrade to USB and upgraded the soundbar.
It was easy to do and took less than 5 minutes - once you've found your firmware upgrade, you can follow the upgrade instructions HERE:http://downloadcenter.samsung.com/content/FM/201308/20130807195910364/USB_Upgrad e_Guide_English.pdf
Hopefully this will help others.
- AW.