Media Queries for monitor with retina

Alright?

I'm trying to use the media query for retinal monitor (macbook pro), but I can not make the code be considered by the browser in any way, I tried in several ways, considering the link:

link

The viewport meta tag looks like this:

meta content="width=device-width, initial-scale=1, maximum-scale=2, user-scalable=no" name="viewport"

I tried this way:

@media only screen and (min-device-pixel-ratio: 1.5), 
    only screen and (min-resolution: 192dpi),
    only screen and (min-resolution: 1.5dppx) {

I've tried it too:

@media only screen and (min-device-pixel-ratio: 1.5), 
    only screen and (min-resolution: 192dpi),
    only screen and (min-resolution: 1.5dppx) {

And several other forms on the link: link

Can anyone please help?

Thank you.