E-paper mode for Mac,
no new monitor required

Three different things get called an e-ink monitor

Search for an e-ink monitor or e-ink computer display and three different ideas tend to appear together. The first is a real electrophoretic E Ink panel from a specialist hardware maker. The second is an ordinary LCD monitor with a built-in paper-style picture mode, such as BenQ's ePaper or Paper Color modes. The third is software that gives the display you already own a similar grayscale, lower-stimulation presentation.

Those approaches overlap visually, but they are not the same technology. E Ink describes its panels as reflective displays: ambient light bounces off the display toward you instead of a backlight shining through it. BenQ and Nox both work with conventional emissive displays. They can change color, brightness, contrast, and grayscale behavior; they cannot change how the panel physically produces light.

The cheapest e-ink display may not be a monitor

Searches for a cheap e-ink display or the cheapest e-ink display mix several different products together. A small display module intended for a Raspberry Pi, Arduino project, price label, or embedded device may be inexpensive, but it is not a finished computer monitor with HDMI or USB-C input. Tablets and e-readers appear in the same results even though most cannot act as a normal Mac display.

If the real goal is the cheapest way to try an e-ink-style view on a Mac, start with macOS itself: open System Settings → Accessibility → Display → Color Filters and select Grayscale. That option is free. Nox is for the next step: per-display control, adjustable dimming and contrast, scheduling, shortcuts, and reusable presets without replacing your current screen. If you need a genuinely reflective panel, software is not a substitute for the hardware.

What a real e-ink monitor costs

Monitors built on actual e-ink or e-paper panels, from makers like Dasung and Onyx Boox, run from roughly $700 to $1,900. What you get for that money is real: a reflective surface that looks like paper under any light, no backlight glare, and a screen that is genuinely restful to read for hours.

What you give up is real too. Refresh rates are slow enough that video and fast scrolling smear or ghost. Color is limited or absent entirely. Most are a second monitor you plug in for reading and writing, not a replacement for your main display. That is a reasonable trade for some people and not for others, and it is a decision worth making with the real tradeoffs in view rather than a marketing page.

What Nox does instead

Nox is a $9.99 menu bar app that turns your Mac's own screen grayscale at the display gamma level, not with a colored overlay sitting on top. The preset is called E-Paper, one of 12 built-in filters, and its gamma curve is shaped to feel closer to a printed page than a flat desaturation.

The default preset combines full grayscale with 10% gamma-table dimming, a 3% black-point lift, 10% lower contrast, and a slightly softened 0.95 gamma curve. Those values are starting points rather than a locked picture mode: you can change the dimming, black point, and contrast to suit your screen and room.

• One click or a global shortcut turns it on, from the menu bar.
• Combine it with the Dimming and Black Point sliders to soften harsh contrast further.
• Custom presets can keep the grayscale look while you adjust everything else to taste.
• Pause or schedule it: 15 minutes, 1 hour, until morning, custom times, or sunset to sunrise.
• Per-display control, so a second monitor can stay in full color while your main screen goes paper-like.

BenQ already proved the software idea

BenQ has shipped ePaper Mode on conventional LCD monitors including the GW2485TC and GW2785TC, describing it as a simulated e-book effect for reading. The GW2785TC product page places it alongside the monitor's Reading, Coding, and Care picture modes. Newer programming displays use the name Paper Color Mode; BenQ says the RD280UG mode simulates printed media.

BenQ's technical description is remarkably practical. Its eye-care white paper describes black-and-white output, reduced contrast, brightness around 120 nits, and a 4000–5000K color temperature. In other words, the useful part is not an attempt to reproduce electronic ink particle by particle. It is a carefully chosen set of ordinary display adjustments that makes text reading feel calmer.

Bringing a monitor picture mode to macOS

BenQ's version lives inside supported monitor hardware. Nox brings the same broad idea to macOS, so you are not limited to one monitor model or an on-screen display menu. The E-Paper preset can be selected from the Mac menu bar, assigned per display, toggled with a global shortcut, scheduled for reading hours, and combined with custom dimming or black-point settings.

That is the useful middle ground between a normal color LCD and buying a dedicated e-ink desktop monitor. You keep full refresh speed for scrolling, typing, and ordinary Mac work. When a task needs accurate color, one click restores it. When you are reading, writing, or coding, the same screen can return to a quieter monochrome presentation.

Three approaches compared

A BenQ LCD in ePaper or Paper Color mode sits in the same middle category as Nox: it is a conventional monitor using display processing to create a paper-style view. BenQ can pair that processing with hardware-specific tuning and, on some models, a matte panel. Nox's advantage is portability across your Mac setup and control from macOS itself.

What software cannot do

Being direct about this matters more than selling past it: an LCD screen emits its own light through a backlight. E-ink is reflective, it shows you ambient light bouncing off a physical surface, the way paper does. No amount of gamma reshaping changes which one your Mac's panel is. Nox's E-Paper preset narrows the visual and comfort gap between the two; it does not close it. If what you want is a screen that looks and behaves exactly like paper under a reading lamp, and you use it heavily enough to justify the cost, a dedicated e-ink monitor is still the more honest answer.

Where Nox fits is the much larger set of days in between: when you want less visual noise on the screen you are already using, when a laptop is your only display, or when you want to try the paper-like look before spending hundreds of dollars on separate hardware. It is also worth reading in the context of Nox's other purpose; the app's research-based spectral presets are built for light sensitivity and photophobia, and E-Paper sits alongside them as the calmest, lowest-stimulation option of the twelve.

What Nox changes on your Mac

Nox is a menu bar app for macOS 14 and later, downloaded as a signed DMG from this site. While running, it writes to the display's gamma tables through the standard macOS display APIs. It installs no kernel or system extensions and requires no account. Toggling the filter off or quitting Nox restores full color immediately. To uninstall, quit Nox and move it from Applications to the Trash. Details on data handling are in the privacy policy; support is support@getnoxapp.com.