My computer is not on Mac OS 10.6.X (To be more specific, it is 10.5.8). Therefore, I downloaded the installer from the website that corresponds to this version of Mac OS. However, when I try mounting the .dmg file, I get an error message saying "The Follow disk images failed to mount" and "Air Display Installer 10 not recognized". Has anyone been able to successfully get this app working without buying the latest Mac OS version?