MacOS is the most advanced desktop operating system in the world.

Operating altitude: tested up to 10,000 feet.Relative humidity: 0% to 90% noncondensing.Operating temperature: 50° to 95° F (10° to 35° C).3.5 mm headphone jack with advanced support for high-impedance headphones.Studio-quality three-mic array with high signal-to-noise ratio and directional beamforming.Spatial audio with dynamic head tracking when using AirPods (3rd generation), AirPods Pro, and AirPods Max.Support for spatial audio when playing music or video with Dolby Atmos on built-in speakers.High-fidelity six-speaker sound system with force-cancelling woofers.Advanced image signal processor with computational video.Force Touch trackpad for precise cursor control and pressure-sensing capabilities enables Force clicks, accelerators, pressure-sensitive drawing, and Multi-Touch gestures.78 (U.S.) or 79 (ISO) keys including 12 full-height function keys and 4 arrow keys in an inverted-T arrangement.Supported formats include AAC, MP3, Apple Lossless, FLAC, Dolby Digital, Dolby Digital Plus, and Dolby Atmos.Supported formats include HEVC, H.264, and ProRes.DVI output using HDMI to DVI Adapter (sold separately).Support for one display with up to 4K resolution at 60Hz.

VGA, HDMI, DVI, and Thunderbolt 2 output supported using adapters (sold separately).

Up to three external displays with up to 6K resolution and one external display with up to 4K resolution at 60Hz at over a billion colors (M1 Max).

Up to two external displays with up to 6K resolution at 60Hz at over a billion colors (M1 Pro) or.

Simultaneously supports full native resolution on the built-in display at 1 billion colors and:

Three Thunderbolt 4 (USB-C) ports with support for:.

Fast-charge capable with included 140W USB-C Power Adapter.

100-watt-hour lithium-polymer battery 3.

Up to 21 hours Apple TV app movie playback.

ProMotion technology for adaptive refresh rates up to 120Hz.

XDR brightness: 1000 nits sustained full-screen, 1600 nits peak 2 (HDR content only).

16.2-inch (diagonal) Liquid Retina XDR display 1 3456-by-2234 native resolution at 254 pixels per inch.

M1 Max with 10-core CPU and 32-core GPU.

M1 Max with 10-core CPU and 24-core GPU.

Hardware-accelerated H.264, HEVC, ProRes, and ProRes RAW.

10-core CPU with 8 performance cores and 2 efficiency cores.

Apple refurbished macbook pro 16 inch