“Tizen SDK install is damaged and can’t be opened” on OSX 10.8

“Tizen SDK install is damaged and can’t be opened” on OSX 10.8

BY 26 Feb 2013 SDK & IDE

I attemp to download installer from https://developer.tizen.org/downloads/tizen-sdk with both primary and mirror .dmg link.
when i double click. it has error occur.

http://sdrv.ms/XCWic1

What should i do next?

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