I just purchased a 2,3/16/256 MBpro with a retina screen. It is mostly used together with an older Dell monitor. When I attempt to calibrate both monitors, using my i1Display2 and iProfilerD2 from write the monitors turn nastly green when I create the profile. I have reset PVram etc, but to no avail. Xrite no longer supports the i1Display2 on ML, so there is no help there. I had no problems calibration my former Macbook pro and monitor. Any suggestions ? Apart from buying a new calibrator ;o) I do think the Macbooks display has a very strong contrast, even if it is set to normal in the Accessibility panel.