My MacBook Pro 2013 with two graphic cards (suppose that this caused an issue).
I've got an external display - a Dell U2713HM with maximum resolution 2560x1600, but the MacBook shows only 1920x1080. I tried different ways to change this:
- DVI to HDMI and DVI to display port adapters
- Switch resolutions using Option key
- Override the screen EDID configuration
but nothing helped - still 1920x1080 instead of 2560x1600. I checked the same issue with my colleagues laptops- they have just one internal video card - they have no issues.
I would like to switch that extra video card off - but it seems not possible when use external display.