How to open Unity 3D on a Macbook

Hey,

I downloaded Unity 3D onto my macbook from your website. When I installed it and set it up I opened it and it said: "this program has been installed from the internet. Continue?" I clicked yes and it didn't do anything. It didn't even open. Is that because I'm using a mac? Should I use a PC instead? Please help.

Thanks

Their are 2 different versions, the mac and pc version.

Link to mac version: http://unity3d.com/unity/download/#mac

If that doesn't work, than uninstall/delete the current one, and re-download, save to your computer, then run it their...

Good luck!!