Hi there! I have MacBook Pro (Retina, 13-inch, Early 2015), Intel Iris Graphics 6100 1536 MB ... I want buy a monitor with a highest resolution which support 60hz as a second monitor. Actually, looking for DELL side. So, the question is - what the highest resolution should be for monitor 60hz which will be support with this MBP? I try to found additional information, and all are different. apple.com say that max resolution is 1920x1080, and next - 3840x2160 resolution at 30Hz, but what about 2560x1440? Maybe you have any other options? Thanks a lot in advance.