iMac 24": CSS viewport of 2048 × 1152 px, resolution and responsive test

Why test your site on iMac 24"?

CSS viewport resolution of iMac 24"

This resolution is what your stylesheet actually manipulates. It determines the applied breakpoint, the number of displayed columns, and the size of your images.

The height remains indicative: Safari, Chrome, and other mobile browsers reduce the visible area with their address bar, which folds on scroll.

Be cautious when analyzing your statistics: some tools only report the manufacturer resolution, never the CSS viewport presented here.

Pixel density of iMac 24"

The device pixel ratio of iMac 24" is 2. Each CSS pixel is thus rendered by 2 physical pixels, making any image provided in simple resolution immediately visible.

Manufacturer resolution of iMac 24"

This is the number of physical pixels on the screen, as announced by the manufacturer. Useful for preparing your image exports, useless for your media queries.

• 4096 pixels in width
• 2304 pixels in height
• 254 pixels per inch (ppi)
• 9.3 inches diagonal, or 23.5 cm
• Screen ratio of 16:9

User-Agent of iMac 24"

This string is what the browser of iMac 24" sends. It is useful for your automated tests, reading your server logs, and server-side detection.

Mozilla/5.0 (Macintosh; Intel Mac OS X 15_3_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.7049.114 Safari/537.36

Media queries and code snippets for iMac 24"

These snippets are generated from the exact characteristics of iMac 24". Copy them directly into your stylesheet or configuration.

@media only screen and (min-width: 2048px) and (max-width: 1151px) {
  /* iMac 24" */
}

@media only screen and (-webkit-min-device-pixel-ratio: 2),
       only screen and (min-resolution: 192dpi) {
  /* High-density images and icons */
}

// tailwind.config.js
module.exports = {
  theme: {
    screens: {
      'apple-imac-24-inch-2021': '2048px'
    }
  }
}

const isDeviceWidth = window.matchMedia('(min-width: 2048px)').matches;
const isHighDensity = window.devicePixelRatio >= 2;

<meta name="viewport" content="width=device-width, initial-scale=1">

Free iMac 24" simulator

Mobile FIRST includes iMac 24": your page displays in a viewport of 2048 x 1152 pixels, with the model's User-Agent, touch events, and scrolling behavior of a real mobile.

This is where the difference with Chrome DevTools' responsive mode is seen: DevTools resizes a window, the extension replicates the device's browser and allows exporting shareable screenshots and videos.

1. 01 Install the extension — Add Mobile FIRST to Chrome, Firefox, or Edge. Installation is free and requires no account.
2. 02 Open the page to test — Go to the URL to check, including a local address like localhost:3000.
3. 03 Choose iMac 24" — Select iMac 24" from the list of devices. The viewport switches to 2048 x 1152 pixels, and the mobile User-Agent is applied.
4. 04 Check rendering — Scroll, change orientation, test your forms, then capture an image or video to share.

Comparison with similar models

The neighboring formats of iMac 24" are the ones to test right after, as they reveal poorly placed breakpoints.

iMac 24" PNG mockup

To present a mockup or capture in a realistic frame, the transparent mockup of iMac 24" is available for free download.

Frequently asked questions about iMac 24"

Updated on August 15, 2026