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Make sure your speakers are Bluetooth compatible. Locate the power button and press to turn on. Navigate to System Preference by clicking the apple icon in the top left hand corner of the screen. Then click on the Bluetooth option in the third row. If it is off, click the button to turn it on. Your Mac will automatically begin searching for other Bluetooth devices in the area. Refer to your speaker's manual book to turn on Bluetooth. Usually this is done by pressing and holding down a specific button until it lights up. Once this happens, your speaker device will show up in the Bluetooth window on your Mac. Click on the device and pair - if there is a pass code necessary enter it now. Click back to the original System Preference menu. Then click on the Sound option in the second row. Click on the Output sub menu option. There should be a list of output options available in a small menu. Click on your Bluetooth speakers. Enjoy your music!

Summary:
Turn on your speakers. Turn on your Macbook's Bluetooth. Turn on your speaker's Bluetooth. Pair the devices. Configure sound.