If you are having trouble installing the Kaltura Capture software on a new Mac running OS 10.5 Catalina, please see the workaround solution listed below.
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Solution
The workaround for the security pop up is to go to the Applications folder, right-click on the Kaltura Capture application and click Open. Then it will give you a third button on the pop up to run anyway.
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Once it’s installed, return back to Canvas My Media -> Add New -> Kaltura Capture.
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Kaltura Capture Hardware and Operating System Requirements.
https://knowledge.kaltura.com/help/kaltura-capture—prerequisites-and-system-requirements