Unable to install Ignite on my Mac

Hi,i've got te M-Audio Vocal Studio and normally i can download with my micro. I'm on mac 10.10.5. When i try to open the software taken on your site after the registration, mac said that the software is defective. when i download, the name's file is : Ignite_1_3_1_ maybe it's not the good version for my mac ? What can i do ?
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