MacBook Pro 15″ Retina display

Retina

Native resolution

2880 × 1800

Default looks-like size (2×)

1440 × 900

Pixel density

221 PPI (15.4″ panel)

Aspect ratio

16:10 (1.60:1)

The MacBook Pro 15″ Retina ships a 15.4-inch panel at 2880×1800 — 221 pixels per inch. At the default 2× scaling, macOS renders a workspace that looks like 1440×900 points while drawing every element with four physical pixels.

The 15.4-inch Retina panel that shipped on MacBook Pro from 2012 through 2019 — 220 PPI, defaulting to a 1440×900-point workspace. Plenty of these machines remain in service, which keeps the resolution alive in browser statistics.

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