How to Make Your Mac Screen Warmer at Night Automatically

How do you automatically warm your Mac screen at night?

macOS includes Night Shift, a built-in colour temperature filter that shifts your display toward warmer tones on a schedule you define. It requires no third-party software and works on any Mac running macOS Catalina or later, including macOS Sequoia.

Here is the complete setup in macOS Sequoia:

1. Click the Apple menu in the top-left corner and choose System Settings.
2. Scroll down the sidebar and select Displays.
3. Click the Night Shift button in the lower area of the Displays pane.
4. Under Schedule, open the dropdown and select Sunset to Sunrise. macOS uses your location to calculate the correct times automatically - you do not need to enter them manually.
5. Drag the Colour Temperature slider to the right, toward More Warm. For maximum warming, drag it all the way to the right end.

Once set, Night Shift activates automatically each evening and turns off each morning. You do not need to touch it again.

What colour temperature does Night Shift reach at maximum warmth?

At maximum warmth, Night Shift reaches approximately 3200K. To put that in context:

• 6500K - standard daylight / cool white display (default Mac setting)
• 3200K - Night Shift at maximum warmth (roughly warm tungsten light)
• 2700K - warm household LED bulb
• 1800K - candlelight

The jump from 6500K to 3200K is substantial - it removes a significant portion of blue light from your display output. However, sleep researchers working with circadian biology often recommend getting below 3000K in the final 2 hours before bed, which Night Shift cannot achieve on its own.

Apple does not publish the exact Kelvin floor for Night Shift. The 3200K figure comes from user measurement using colorimeter tools and is widely reported in display and sleep communities. The ceiling (full warmth disabled) is 6500K.

Is there a warmer option than Night Shift for Mac?

Yes. Two apps extend beyond Night Shift’s temperature floor:

f.lux (free)

f.lux is a long-standing free app that supports colour temperatures from 1200K to 6500K - reaching considerably warmer than Night Shift’s floor. It runs as a user-space daemon rather than through native macOS APIs, which gives it a wider range but also results in higher CPU usage (1.8–4.2% sustained) compared to Night Shift’s sub-0.3% footprint. f.lux also offers three independent time periods: Daytime, Sunset, and Bedtime, each with their own Kelvin target.

Solace ($4.99, one-time)

Solace is a macOS menu bar app that combines colour temperature warming with dark mode scheduling, wallpaper syncing, and weather-aware appearance switching. It uses native macOS APIs for colour temperature changes, keeping CPU usage minimal. Unlike Night Shift, Solace lets you set a specific Kelvin target for your evening schedule. It also handles gradual transitions, so the warm shift fades in rather than switching abruptly.

If you are already running Night Shift, disable it before enabling Solace to avoid conflicts. Running both simultaneously can produce unpredictable colour output.

Night Shift vs Solace vs f.lux: quick comparison

How does warming your screen affect sleep quality?

The connection between screen colour temperature and sleep quality is grounded in well-established photobiology. The key mechanism is blue light’s effect on melatonin production.

The human eye contains a specialised type of photoreceptor cell called intrinsically photosensitive retinal ganglion cells (ipRGCs). These cells peak in sensitivity at 480nm - squarely in the blue region of the visible spectrum. When 480nm light enters the eye, it sends a signal to the suprachiasmatic nucleus (the brain’s master clock), which suppresses melatonin production from the pineal gland.

A 2015 study from Harvard Medical School found that blue light suppresses melatonin for approximately twice as long as green light and shifts the circadian rhythm by up to 3 hours compared to green light’s 1.5-hour shift. Warmer colour temperatures shift display output away from this 480nm peak, reducing the melatonin-suppressing effect.

Supporting data from the National Sleep Foundation found that 43% of adults report that device use in the hour before bed makes it harder to fall asleep. Warming your screen does not eliminate this problem entirely - the brightness of a display at any colour temperature still carries some alerting signal - but it reduces the melatonin-suppressing component significantly.

The practical takeaway: warmer screens in the evening are unlikely to make your sleep worse, and there is meaningful evidence that they help. The benefit is greatest when warming is combined with reducing overall display brightness as bedtime approaches.

Should you combine warm colour temperature with dark mode?

Yes - dark mode and warm colour temperature address different aspects of evening screen comfort, and they work best together.

Warm colour temperature reduces blue light emission from your display by shifting the white point toward amber tones. This targets the melatonin-suppression pathway described above.

Dark mode reduces the overall light output of your interface by switching backgrounds from white (~100% luminance) to near-black (~5–10% luminance). This lowers the total amount of light entering your eye from the screen, which reduces both the alerting effect and eye strain from contrast against a dark room.

Used together, they create a complementary effect: dark mode reduces the total brightness load, while warm colour temperature shifts whatever light remains away from the sleep-disrupting blue range. Neither approach is a substitute for the other.

Solace handles both automatically. It can schedule your Mac’s colour temperature to warm at sunset while simultaneously switching to dark mode on the same schedule, with no manual intervention required. You set it once, and the two systems stay in sync every evening.

Frequently asked questions