​​The Cambridge Crystallographic Data Centre (CCDC).
Why do I have problems selecting atoms or scaling issues in Mercury on MacOS?
Some customers have experienced issues on macs such as difficulty selecting atoms and scaling issues. We have found in these cases the customer is often using a Mac with a monitor with retina display, but Mercury or ConQuest is displaying on an external monitor that does not have retina display. To work around the issue, use the Mac’s built-in monitor, or use an external monitor with retina display.