Trouble installing Unity on OSX Yosemite

I have a new MacBook Pro, It’s got the latest embodiment of OSX Yosemite, I can’t get Unity to install, it downloads, I run it, IT SAYS “Install completed” but the web browser doesn’t automatically reload after installation & when I manually reload, it just tries to get me to download it again, I’VE DOWNLOADED IT 6 TIMES…

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