Hello and welcome to the forum! First, give us information on the Mac you own, i.e. model/year and the OS X installed. Second, I have not used this microscope and thus have no personal experience on setting up the device, but looking at the pic below from their website, seems like Celestron support would be your best option - maybe someone will 'chime in' who has used this microscope - good luck - looks cool! Dave
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