I have an older g4 running os x 10.2.7. I just purchased a RALINK usb wireless adapter. I'm having trouble installing the driver. It came with a driver cd but when I click on the mac driver it says there is no file to be mounted. The driver file is a .dmg file if that helps. I'm new to macs so I'm not sure what this means. on ralink's website, their drivers for this say it is compatible with 10.3. Could this be incompatible with my version of OS X?