MacBook Pro 14″ / 16″ (M3): Screen Size & CSS Viewport

The MacBook Pro M3 generation brought a 20% increase in SDR brightness to 600 nits — a meaningful upgrade that changed how web content looks in everyday non-HDR scenarios. Most web browsing happens outside of HDR content, which means 600 nits SDR brightness directly affects how your website's colors, gradients, and images appear.

Higher SDR brightness shifts the perception of web colors toward slightly more vivid and saturated appearance. Designs created on an older, dimmer display may look over-saturated on the M3 Pro's brighter panel. If you notice color discrepancies between your design files and the rendered output, brightness calibration differences between design and test devices may be the cause.

The introduction of Space Black as a colorway was a visual-only change, but it signaled Apple's intent to make the MacBook Pro an aspirational fashion item as well as a tool — attracting a new category of creative professional who was previously a Mac skeptic. This expanded the population of users on 1512×982 and 1728×1117 CSS viewports, reinforcing the importance of these widths as primary testing targets for developer, design, and creative professional audiences.