Mac Night Mode: How to Turn It On & Off
Mac night mode, officially called Night Shift, shifts your display colors to the warmer end of the spectrum after sunset, reducing blue light exposure to help you sleep better. You can turn it on manually, schedule it, or adjust its intensity in System Settings (or System Preferences on older macOS versions). This article explains exactly where those controls are, how Night Shift differs from Dark Mode, and how to fix common issues.
What Night Shift Actually Does
Night Shift is a display feature built into macOS since OS X El Capitan (10.11) on compatible Macs. It uses your Mac’s clock and geolocation to determine sunset and sunrise times, then automatically shifts the color temperature of your screen from a cool blue-white to a warmer yellow-orange. The goal is to reduce the amount of blue light emitted in the evening, which research suggests can interfere with melatonin production and disrupt circadian rhythms.
It is important to distinguish Night Shift from Dark Mode. Dark Mode changes the user interface—menus, windows, and apps—to dark backgrounds with light text. Night Shift changes the color temperature of the entire display, including white backgrounds. You can use both at the same time; they are independent settings.
How to Turn On Night Shift Manually
The quickest way to enable Night Shift is through Control Center:
- Click the Control Center icon in the menu bar (looks like two toggle switches).
- Click the Display module (on macOS Monterey and later) or the brightness slider area.
- Click Night Shift to turn it on immediately. It will stay on until the next sunrise or until you turn it off.
Alternatively, go to System Settings (macOS Ventura and later) or System Preferences (macOS Monterey and earlier) → Displays → Night Shift tab. There you’ll find a slider to adjust color temperature from “Less Warm” to “More Warm,” and a toggle to enable it manually.
How to Schedule Night Shift
To have Night Shift turn on automatically, you need to set a schedule:
- Open System Settings → Displays → Night Shift.
- Next to “Schedule,” choose one of three options:
- Off – Night Shift only turns on when you click it manually.
- Sunset to Sunrise – Uses your location to determine times. You must enable Location Services for this to work.
- Custom – Set your own start and end times (e.g., 10:00 PM to 7:00 AM).
- If you choose “Sunset to Sunrise,” ensure Location Services is on: System Settings → Privacy & Security → Location Services → enable it for “System Services” (specifically “Time Zone & System”).
If you don’t want to use location, the Custom schedule works without any location permissions.
Adjusting Color Temperature and Intensity
Night Shift’s warmth is adjustable. In the same Displays → Night Shift panel, drag the Color Temperature slider. Moving it to the right (toward “More Warm”) makes the screen more orange; moving left (“Less Warm”) keeps it closer to normal. The default is roughly in the middle. You can preview the effect live while dragging.
Some users find the default too yellow for photo editing or color-critical work. In those cases, either turn Night Shift off or set it to “Less Warm.” Note that Night Shift is not a substitute for professional color calibration—it changes the display’s white point, so colors will not be accurate while it’s active.
Why Isn’t Night Shift Working?
Common reasons Night Shift fails to activate automatically:
- Location Services disabled. If you chose “Sunset to Sunrise,” macOS needs your location. Go to System Settings → Privacy & Security → Location Services and ensure it’s on for System Services.
- Unsupported Mac or display. Night Shift requires a Mac from 2012 or later and works on the built-in display and most external displays. Some older external monitors or those connected via certain adapters may not support the feature.
- macOS version too old. Night Shift was introduced in macOS Sierra (10.12) for Macs, not El Capitan as sometimes misreported. If you’re on an older OS, update.
- Display sleep or multiple displays. If you have multiple monitors, Night Shift applies to all of them, but some external displays may ignore the signal. Try disconnecting and reconnecting.
- Time zone settings. If your Mac’s date/time is wrong or set manually, sunset calculations will be off. Enable “Set time and date automatically” in System Settings → General → Date & Time.
If Night Shift still doesn’t work, restart your Mac and check for macOS updates.
Night Shift vs. True Tone vs. Dark Mode
These three features are often confused:
- Night Shift – Warms the entire display based on time of day.
- True Tone – Adjusts white balance to match ambient lighting (available on MacBook Pro 2018 and later, and some external displays). It works continuously, not just at night.
- Dark Mode – Changes the UI theme to dark backgrounds. It doesn’t affect the display’s color temperature.
You can enable all three simultaneously. True Tone and Night Shift both change colors, so if both are on, the effect is additive. Some users prefer to turn off True Tone when using Night Shift to avoid an overly orange screen.
Does Night Shift Affect Battery Life?
Night Shift itself has a negligible effect on battery life because it’s a software-level color adjustment—it doesn’t change the backlight brightness. However, if you manually increase brightness to compensate for the warmer (dimmer-looking) screen, that will use more battery. The feature is not a power-saving tool; it’s purely for comfort and sleep hygiene.
Frequently Asked Questions
Does Night Shift work on external monitors?
Yes, on most modern external displays connected via DisplayPort, HDMI, or Thunderbolt. However, some older monitors or those using certain VGA adapters may not support the color shift. If the external display doesn’t change, try a different cable or adapter.
Can I schedule Night Shift for specific days?
No, macOS only allows a single daily schedule (either sunset-to-sunrise or a custom time range). You cannot set different times for weekdays vs. weekends without third-party apps.
Will Night Shift affect photo editing accuracy?
Yes, because it changes the display’s white point. For color-critical work, turn Night Shift off or set it to “Less Warm.” It’s not a calibration tool.
How do I turn Night Shift off completely?
Go to System Settings → Displays → Night Shift and set “Schedule” to Off, then toggle the manual switch off. You can also click the Control Center Display module and click Night Shift to disable it until sunrise.
Does Night Shift work in recovery mode or before login?
No, Night Shift only activates after you log in to your user account. The login screen and recovery mode use default display settings.
Is Night Shift the same as f.lux?
No, f.lux is a third-party app that predates Night Shift and offers more granular controls. Night Shift is built into macOS and is generally sufficient for most users. If you need more customization, f.lux is a popular alternative, but it requires separate installation.
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