Use the latest version of macOS
The problem with the Mac Mini is that it is not sending sound out through the HDMI cable. When I go to the Sound preferences, there is no HDMI device I can pick for output. (I suspect this is because it recognizes the Sony projector and knows it doesn't have sound.) I've tried using Airplay to send sound to the Sonos system that way.
The first step is to make sure that you're using the latest version of macOS. Back up your important information and then update the software on your Mac.
Running mac OSX 10.12.1 replaced my old ATI 5770 car and used the latest mac osx drivers, cuda driver 8.0.53 and quadro driver 367.1510.15f03 and get great video on both the HDMI and Display ports, but no sound. In the alt/ audio the monitor is no longer listed as a sound output source, and in the mac system/hardware/audio section there are no. Learn how to fix your computer when it is connected to a monitor with an HDMI cable, but the screen display or sound does not work correctly. Learn more abou. For example, if you have plugged your Mac into your TV via HDMI, and you are wondering why the speakers plugged into your Mac aren't getting the audio, it's because the sound is being routed to. USB C Adapter for MacBook Pro 2020, MacBook Pro USB Adapter HDMI MacBook Pro Multiport Adapter with 4KHDMI, 2 USB 3.0, TF/SD, USB-C 100W and Thunderbolt 3 4.6 out of 5 stars 515 $29.99 $ 29.
Check your sound settings
If you still can't hear sound from the internal speakers after updating your computer's software, check your sound settings.
First, disconnect any external audio devices from your computer. Also disconnect any cables from the USB, Thunderbolt, or 3.5mm audio ports.
- From the Apple menu , choose System Preferences.
- Click Sound.
- Click the Output tab, then select the built-in speakers. If you don’t see built-in speakers as an option in the Output window, contact Apple Support.
- If the Output volume slider is set low, move the slider to the right and test again.
- If the Mute checkbox is selected, deselect it and test again.
- If you still don’t hear any sound, contact Apple Support.
Mac computers that have any of the following ports can connect to HDMI devices. Learn how to identify the ports on your Mac.
- HDMI port: Connects directly to HDMI using an HDMI cable.
- USB-C or Thunderbolt 3 (USB-C) port: Connects to HDMI using an adapter, such as the Apple USB-C Digital AV Multiport Adapter.
- Mini DisplayPort: Connects to HDMI using a third-party Mini DisplayPort to HDMI adapter or cable.
Mac computers that have an HDMI port comply with HDMI 1.4b and support:
- At least 1080p video over HDMI, and some Mac models support higher resolutions when connecting to 4K displays, 5K displays, and Ultra HD TVs
- 8-channel/24-bit audio at 192kHz, Dolby Surround 5.1, and traditional stereo
- HDCP-encrypted playback from iTunes and QuickTime Player (version 10). Safari in macOS Sierra or later also supports HDCP-encrypted playback, if the web page is HTML5-enabled and the content is FairPlay Streaming-enabled and delivered using Media Source Extensions or HTTP Live Streaming.
If using an adapter, check the specifications of the adapter to learn about supported resolutions and other details.
After making the connection
If your Mac doesn't recognize your HDTV, display, or other HDMI device after making the connection:
- Turn off the HDMI device while your Mac is turned on.
- Unplug the HDMI cable from your Mac, then plug it in again.
- Turn on the HDMI device.
If the video on your HDTV or display extends beyond the borders of the screen, open Displays preferences and adjust the Underscan slider for a better fit. Use any of these methods to open Displays preferences:
- Choose Apple () menu > System Preferences, then click Displays.
- Press Shift-Command-A to open the Applications folder. Then double-click System Preferences, then click Displays.
- If your keyboard has brightness controls, press Option–Brightness Up or Option–Brightness Down.
If your HDMI device isn't receiving audio from your Mac:
- Choose Apple menu > System Preferences, then click Sound. In the Output pane, make sure that your HDMI device is selected.
- If you're connecting using a Mini DisplayPort adapter, make sure that your Mac can send audio over Mini DisplayPort.
- If you're connecting from a Mac mini, unplug any audio device that is plugged into your computer's Audio-Out port.
If your Mac goes to sleep while a video is playing or paused, you might see an HDCP error. Quit the app that is playing the video, then open the app again. If the issue continues, choose Apple menu > System Preferences, then click Energy Saver and adjust the settings so that your display doesn't turn off.
Hdmi For Mac No Sound Booster
- If your Mac has an HDMI port, you can use the Apple HDMI to DVI Adapter to connect to a DVI display.
- Mac computers don't support using CEC (Consumer Electronics Control) to control HDMI devices.