The mouse works on a iMac Although, the configuration fails but that Synapse 2.0 manure. Program does not recognize the mouse, as you can plug the USB ever so often on and pull off. Legacy drivers no longer work after Synapse 2.0 also. Uninstalling Synapse 2.0 also does not go. The only way would be to reinstall. Unless the support knew a solution, just stupid that he does not answer. With the default settings you can live indeed, but you should not have to at this price.