Article in English: If you haven’t already done so, follow the instructions that came with your speakers to connect them to your computer. It’s the first icon on the Dock. It’s at the top of the screen.  This opens a window called ″Audio Devices.″ It’s below the left panel. A short menu will appear. A list of connected speakers will appear in the right panel. To do so, check the box to the left of each speaker’s name. Any speakers you select will play audio from your Mac at the same time. It’s helpful to give the pair of speakers a name so you can easily find them in your sound settings. To do so, double-click Multi-Output Device in the left column (likely near the bottom), then type ″All Bluetooth Speakers″ (or something similar). The final step is to tell your Mac to route audio through the speaker pair. Here’s how:  Click the Apple menu and select System Preferences. Click Sound. Click the Output tab (the second tab near the top of the window). Click the name you gave your pair of speakers (e.g. ″All Bluetooth Speakers″).

Summary in Chinese:
将蓝牙音箱和Mac电脑配对。 打开“访达”。 点击前往菜单。 点击实用工具。 双击音频MIDI设置。 点击+。 点击创建多输出设备。 选择两个蓝牙音响。 重命名新的多输出设备。 将音响设置为Mac的音频输出。