Thanks to advances in modern technology, connecting external audio systems with excellent sound quality has never been easier. Apple MacBook can be easily connected to different types of audio systems. There are many ways to connect speakers to your MacBook, from Bluetooth-connected surround sound systems to using a standard headphone jack. The main two connection options are Bluetooth and a standard headphone jack.
Steps
Method 1 of 2: Connecting Bluetooth Speakers
It is best to connect your speakers to your laptop via Bluetooth. The MacBook has a built-in Bluetooth adapter, so you can consider connecting Bluetooth speakers or headphones as an option.

Step 1. Turn on your speakers "Pairing" or "Discovery" mode
Press and hold the speaker power button for 10 seconds. For the exact sequence of steps to pair your devices, refer to the instructions that came with your speakers.

Step 2. Go to "System Preferences." This item can be found by clicking on the Apple logo in the upper left corner of the screen.

Step 3. In the dialog box that opens, click on the “Bluetooth” icon
It is located in the "Internet and Network" section.

Step 4. Click the "Turn on Bluetooth" button

Step 5. Then click on “Set Up New Device”
You should see the Bluetooth Assistant.

Step 6. Select your speakers from the list and click the "Continue" button

Step 7. At the bottom of the window, click on the "Settings" button

Step 8. Select “Use as audio device”
This completes the setup.
Method 2 of 2: Connecting speakers using the headphone jack
This method has been used frequently for some time. Using the headphone jack is easier than connecting speakers to your MacBook using Bluetooth. However, wires are used here, which greatly limits the portability of your MacBook.

Step 1. Make sure your speakers have a 3.5mm plug
If not, (for example, this is a 1/4”or RCA plug), you will need to purchase a 3.5mm plug adapter.

Step 2. Route the cables carefully
Today, cables are made longer than before. This does not mean that they have to be bent and tangled.
Almost imperceptibly, bent cables make it difficult for electricity to pass through them, which negatively affects sound quality. Of course, this is hardly perceptible, but it is better to keep an eye on it

Step 3. Use speakers
Just plug them into your MacBook and the speakers are ready to use. To get the best sound quality, tinker a bit with your speaker settings.