OS X 10.10 Yosemite was released on October 16, 2014.

Elgato applications function well with OS X 10.10.

 

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Elgato Game Capture HD

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Versions 1.4.2 and 2.0 of Elgato Game Capture HD are available for use with OS X 10.10 Yosemite.

You can get the latest version of Elgato Game Capture HD from here:

https://www.elgato.com/en/game-capture-hd-support

The current status is normal behavior - they are fully supported.

 

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Elgato Video Capture

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Version 1.1.5 of Elgato Video Capture has been tested with OS X 10.10 Yosemite.

You can get the latest version of Elgato Video Capture from here:

https://www.elgato.com/video/video-capture/support/update-mac

The current status is normal behavior - it is fully supported.

 

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EyeTV

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Version 3.6.7 of EyeTV is available for use with OS X 10.10 Yosemite.

You can get the latest version of EyeTV from here:

http://www.elgato.com/eyetv/eyetv-3/support/update

The current status is normal behavior - it is fully supported.
 
 

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Turbo.264 HD

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Version 1.2.3 of Turbo.264 HD has been tested with OS X 10.10 Yosemite.

You can get the latest version of Turbo.264 HD from here:

https://www.elgato.com/en/video/turbo-264-hd/support/update

The current status is normal behavior - it is fully supported.