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MacBook Pro (April 2009) Mini Displayport… - Apple Community
https://discussions.apple.com/thread/2415014
I have last years MacBook Pro, and was told that the mini display port only supports output to video, no audio whatsoever, not even HDMI. What a waste. Instead you have to use a cable from the headphone jack to make the sound work.
Identify the ports on your Mac - Apple Support
https://support.apple.com/en-us/HT201736
On 14-inch and 16-inch MacBook Pro models with Apple silicon, you can connect high-impedance headphones to the 3.5mm audio jack. Use Audio-In with a microphone or other audio-input device that connects using an audio cable that has a 3.5 mm (1/8 inch) audio jack.
About the Apple Mini DisplayPort adapters - Apple Support
https://support.apple.com/en-us/HT204149
The Apple Mini DisplayPort to VGA Adapter connects a Mac that has a Mini DisplayPort , Thunderbolt port , or Thunderbolt 2 port to display that uses a VGA cable. This adapter supports display resolutions up to 1920 x 1200. To achieve resolutions greater than 1600 x 1200, displays with high refresh rates might require that you lower the refresh rate.
Mini DisplayPort to HDMI Adapter (for Apple Macbook Air …
https://www.walmart.com/ip/Mini-DisplayPort-HDMI-Adapter-for-Apple-Macbook-Air-13-Pro-15-17-New-Surface-2017-Microsoft-5-4-3-2-1-Display-Port-Male-Female-Video-Converter/343565029
Arrives by Wed, Feb 23 Buy Mini DisplayPort to HDMI Adapter (for Apple Macbook Air 13" Pro 15" 17" / New Surface Pro 2017 Microsoft Surface Pro 5 4 3 2 1) Mini Display Port (Male) to HDMI (Female) Video Converter at Walmart.com
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