How do I design a web prototype for a 1920 layout on my Macbook with dimensions 2560x1600

[yasir0D4D]

I'm designing an web prototype with dimensions 1920 on My Macbook Pro having resolution 2560x1600. When the developers view that the content is zoomed in on the screen with dimensions 1920. How do I solve this problem? I want them to map exactly what I have made on 1920 layout.

[Joely]

What is exactly your problem?

You know that Resolution (pixels) are relative and not a fixed size?

Can you share a screenshot of what you did so far? What is «zoomed in»?