This is my Retina Macbook:
If I purposely shrink the browser, then I can replicate it. Please test adding this:
@media
only screen and (-webkit-min-device-pixel-ratio: 2),
only screen and ( min--moz-device-pixel-ratio: 2),
only screen and ( -o-min-device-pixel-ratio: 2/1),
only screen and ( min-device-pixel-ratio: 2),
only screen and ( min-resolution: 192dpi),
only screen and ( min-resolution: 2dppx) {
#logo img.retina,
#logo h1.retina,
#mobile-logo img.retina,
#mobile-logo h1.retina {
max-width: 97%;
}
}