I'm using an external monitor with my MacBook Pro 13 inch. The external monitor is a Dell 1650x1080 resolution.
I'm connecting using a mini display port to DVI adaptor.
On a previous MacBook Pro 13 inch, I plugged the monitor in and the resolution appeared in the list of Display options.
However, now when I go to Display, the resolution simply does not appear, so I'm running it at the wrong resolution. There doesn't seem to be a way to enter a custom resolution.
I was hoping this solution might work - but it doesn't.