connecting Logitech Z150 speakers to my Mac.

Hello xybqui,

We can help with information for wired speakers. Follow the steps here to see if they resolve the issue: Set up external speakers for stereo or surround sound in Audio MIDI Setup on Mac - Apple Support

"You can configure external speakers connected to your audio device for stereo or multichannel output, such as surround sound.

Note: Before you configure the speakers, connect them to your audio devices. Make sure your audio devices have any required software installed, are connected to your Mac, and are turned on.

1. In the Audio MIDI Setup app  on your Mac, select an audio output device in the list, then click Configure Speakers.
2. If your output device has multiple streams, they’re listed at the top of the window.
3. To change how you view the speaker configuration, click View, then choose a view. For Isometric or Side view, you can drag the 3D view to rotate it 360 degrees.
4. Click the Configuration pop-up menu, then choose a configuration, such as Stereo or 5.1 Surround.
5. If you have five front speakers and two rear speakers, choose 7.1 Surround. If you have three front speakers and four rear speakers, choose 7.1 Rear Surround.
6. For each speaker in the list, click the Channel pop-up menu, then choose a channel to assign to the speaker.
7. You can click a speaker in the 3D view to highlight it in the list.
8. Tip: If your output device has multiple streams offering multiple channels, it may be difficult to find the channel you want in the pop-up menu. At the top of the window, you can deselect the checkbox for each stream you don’t want to use, so their channels aren’t shown in the pop-up menu.
9. To hear a speaker’s test tone, click its Speaker button .
10. For surround sound configurations, make sure the test tone for each speaker is at the same volume when heard from the listener’s vantage point.
11. You can adjust the volume for each speaker channel in the Audio Devices window.
12. Tip: You can adjust the test tone volume in the Audio pane of Audio MIDI settings by dragging the slider.
13. Click Apply to save your configuration and apply it to the speakers.

Some macOS apps render audio output in stereo while others use multichannel, depending on the media content. You may want to set up your speakers for both configurations to customize your audio experience when using apps.

See also

Combine audio devices into a single aggregate device in Audio MIDI Setup on Mac

If an audio device isn’t working in Audio MIDI Setup on Mac

If your audio apps stop working while using Audio MIDI Setup on Mac

If audio switches to a different device in Audio MIDI Setup on Mac"

We hope this helps.

Cheers!

Hi xybqui,

Thanks for posting here in Apple Support Communities. Are your speakers wired or Bluetooth? If they're Bluetooth, then you can follow the steps listed in this article to connect them. See: Set up a Bluetooth audio device to work with Mac - Apple Support

Kind regards.