![]() The Mini DisplayPort HDMI adapters and the 27 inches Apple Cinema Display screen can not receive sound on this type of machine.įor the sound, you need a MacBook Mid 2010 (GeForce 320M), a MacBook Air 2010 11-inch or 13-inch (Core 2 Duo), a MacBook Pro 2010 13-inch (GeForce 320M), a MacBook Pro 2010 15-inch or 17-inch (GeForce 330M), a Mac mini 2010 (Core 2 Duo), an iMac 2009/2010 21-inch, an iMac 2009/2010 27-inch, or a Mac Pro 2010 (please note that changing the graphic card does not bring the sound). This is a limitation due to the motherboard. On the first generations of Mac equiped with Mini DisplayPort (MacBook Pro 2008/2009, etc), the sound is not transmitted on Mini DisplayPort. Specifically, a Mini DisplayPort adapter runs on a Thunderbolt plug. Technically, the plug is the same and the only difference is that the Thunderbolt connector can carry – in addition to the classic Mini DisplayPort – a Thunderbolt signal, which is a signal PCI-Express (4 lines). Thunderbolt is fully compatible with Mini DisplayPort peripherals. As this issue os often misunderstood, I will expose the difference ( and also similarities ) between Thunderbolt and Mini DisplayPort.
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