How to Personalise Your Mac: Wallpapers, Themes, and Appearance Automation (2026)

Understanding Mac Appearance: Light Mode, Dark Mode, and Auto

macOS offers three core appearance modes, each controlling how the interface renders across every built-in app and most third-party apps. You switch between them at System Settings > Appearance.

Light mode uses a white and light-grey palette for windows, sidebars, and menus. It tends to read well in bright environments and against sunlit backgrounds. Dark mode inverts that palette to deep greys and near-blacks, reducing the luminance output of the display and making it easier to focus on content in dim environments. Auto mode switches between the two based on your local sunrise and sunset times, using the same Location Services data that powers Night Shift.

Auto mode does more than toggle your interface colour. If you have a wallpaper set to its "Light and Dark" variant - a feature added in macOS Ventura and refined in Sonoma and Sequoia - the wallpaper will also switch images at the same sunrise/sunset transition. This means a single setting in System Settings can co-ordinate your interface colour and your desktop image simultaneously, with no third-party tools required.

What Auto mode cannot do is give you time-based control beyond a single daily flip. It does not let you define a custom schedule, vary the transition time by season without relying on your live location, or add extra transitions for midday or late-night states. For that level of control, you need a scheduler like Solace.

For a deeper look at why people use dark mode and what it actually changes: What Is Dark Mode and Why Do People Use It? For the step-by-step process on macOS Sequoia specifically: How to Enable Dark Mode in macOS Sequoia.

Dynamic Wallpapers on Mac

A dynamic wallpaper is a single image file - stored as a multi-frame HEIC container - that cycles through different frames across the day. Each frame is tagged with solar altitude metadata so macOS knows which frame to display at any given moment based on your location and the sun's current position in the sky.

Apple ships a set of dynamic wallpapers with every macOS release. The Sonoma, Monterey, Big Sur, and abstract gradient sets each include a Dynamic variant (marked with a sun icon), a static Light variant, and a static Dark variant. When you select the Dynamic variant in System Settings > Wallpaper, macOS reads your Location Services data for System Customization and interpolates the correct frame throughout the day. A morning shot of a landscape at dawn transitions through midday brightness to golden hour and finally to a night sky, all without any interaction from you.

There are a few requirements to be aware of. Location Services must be enabled for System Customization specifically - you can check this at System Settings > Privacy & Security > Location Services > System Customization. Without it, macOS falls back to a fixed static frame. The feature works on all Macs running macOS Mojave or later.

For a full explanation of how the technology works under the hood: What Is a Dynamic Wallpaper on Mac? If your dynamic wallpaper has stopped cycling through frames, the most common causes are covered in Dynamic Wallpaper Not Changing on Mac.

Creating Your Own Dynamic Wallpapers

The built-in macOS sets are polished, but many users want to use their own photography or artwork as a dynamic wallpaper. This is possible using third-party tools that package custom images into the HEIC multi-frame format with the correct solar metadata.

Dynamic Wallpaper Club offers a library of community-created dynamic wallpapers as well as a web-based tool for building your own. Dynamo is a macOS app that gives you frame-by-frame control: you import your own still images, assign each one a solar angle (altitude above horizon), and export the result as a properly tagged HEIC file. Both tools produce files that behave identically to Apple's built-in dynamic wallpapers once imported.

Importing your finished HEIC file into System Settings is straightforward: open System Settings > Wallpaper, click the plus button at the bottom of the wallpaper grid, and navigate to your file. If the HEIC metadata is correctly formed, macOS will show the sun icon indicating dynamic behaviour. If it shows as a static image, the solar metadata was either missing or incorrectly written - re-export from your creation tool and try again.

For a step-by-step walkthrough of the creation process: How to Create Dynamic Wallpapers for Mac.

Changing Your Wallpaper Based on Time of Day

macOS's Slideshow mode can change your wallpaper at defined intervals - every 5 minutes, every hour, or at login. This gives you variety but not meaningful time-of-day control: it does not know whether it is morning or evening, and it cannot assign specific images to specific times.

The more intentional approach is to pair your wallpaper choice with your appearance mode. When you set a "Light and Dark" wallpaper in System Settings, macOS automatically shows the light variant during the day and the dark variant at night, following the same schedule as Auto appearance mode. This is already a meaningful step up from a static wallpaper - your desktop co-ordinates with the sky outside.

For true time-of-day control - a sunrise image at 6am, a neutral daytime photo at noon, a golden-hour image at 5pm, and a dark cityscape at night - Solace gives you that granularity. You can assign a different wallpaper to each appearance state and let Solace's solar schedule handle the transitions automatically. The schedule adapts to your actual local sunset time throughout the year, so you do not need to update it when the clocks change.

For the full guide to time-based wallpaper switching: How to Change Your Mac Wallpaper Based on Time of Day. For automatic wallpaper rotation across a set of images: How to Rotate Mac Wallpapers Automatically.

Matching Your Wallpaper to Light and Dark Mode

macOS has supported per-mode wallpapers since macOS Ventura. In System Settings > Wallpaper, select any image and you will see three options at the top of the customisation panel: Dynamic (if supported), Light, and Dark. Choose "Light and Dark" to assign a distinct image to each appearance state.

This is worth doing with care. A bright, high-key photograph - think a sunlit beach or a white snowscape - looks cohesive with light mode but creates an uncomfortable luminance spike when dark mode is active and every app's interface has gone dark. Conversely, a moody, low-key image pairs naturally with dark mode but looks flat and underexposed in light mode where the UI is predominantly white.

The ideal pairing uses images that are photographically related but tonally matched to each appearance mode. A landscape at midday (light mode) and the same landscape at blue hour (dark mode) creates a sense of continuity while keeping each variant visually balanced. The result feels intentional rather than default - as if the Mac is responding to the time of day rather than just toggling a switch.

For a complete walkthrough: How to Match Your Wallpaper to Light and Dark Mode. For using entirely different images in each mode: How to Use Different Wallpapers for Light and Dark Mode.

Weather-Based Wallpapers and Appearance

Solar scheduling covers the predictable daily rhythm, but the weather introduces variability that a fixed schedule cannot account for. A grey overcast Tuesday in November feels nothing like a bright Tuesday in July - yet a standard solar schedule treats them identically and waits until sunset to switch to dark mode, regardless of how dark the sky looks at 2pm.

Solace's weather awareness addresses this. When enabled, Solace reads local weather conditions via your location and can respond to overcast or rainy conditions by activating dark mode earlier than the scheduled sunset time. The same mechanism lets you assign a weather-specific wallpaper - a rainy-day or overcast image that shows only when the sky is grey. On clear days your standard schedule runs as normal. On cloudy days, your Mac's appearance shifts to match what is actually happening outside.

Setting it up is straightforward: enable weather awareness in Solace's preferences, assign your weather-state wallpapers in the wallpaper section, and choose a cloud-cover threshold at which the overcast appearance activates. Solace handles the rest automatically, switching back to the solar schedule when the weather clears.

Troubleshooting Wallpaper Problems on Mac

Two wallpaper problems come up frequently enough to be worth addressing directly.

Wallpaper stuck on one image. If your wallpaper has stopped updating - either a dynamic wallpaper frozen on a single frame, or a slideshow that has not advanced - the most common cause is a Location Services permission issue. Open System Settings > Privacy & Security > Location Services, scroll to System Customization, and ensure it is set to "While Using" or "Always." If permissions are already correct, try restarting the Dock process from Terminal: killall Dock. This refreshes the wallpaper engine without a full restart. Conflicting wallpaper apps can also cause this - if you have multiple apps managing your wallpaper simultaneously, only one can win.

Dynamic wallpaper not changing. If you selected the Dynamic variant but your wallpaper shows only a single static frame all day, Location Services is almost certainly the cause. Without your location, macOS cannot compute the sun's position and defaults to a fixed frame (usually midday). Check the Location Services permission above, then open System Settings > Wallpaper and re-confirm that the Dynamic variant is selected - not the Light or Dark static option which looks similar in the thumbnail view.

For a complete troubleshooting walkthrough: Mac Wallpaper Stuck on One Image: Fix Guide and Dynamic Wallpaper Not Changing: Fix Guide.

Mac Appearance Tricks Worth Knowing

Beyond the core appearance settings, macOS has a handful of less-obvious customisations that make a meaningful difference to the look and legibility of the interface.

• Per-Space wallpapers. Each Mission Control Space (virtual desktop) can have its own wallpaper. Right-click the desktop in a Space and select "Change Wallpaper" to assign it independently. This lets you use a focus-oriented, minimal image in your work Space and a richer, atmospheric image in your personal Space.
• Bold Text. Found at System Settings > Accessibility > Display, Bold Text increases the weight of system text across the interface, which improves legibility in dark mode where lower contrast can make thin text harder to read.
• Reduce Transparency. Also in Accessibility > Display, this replaces the translucent frosted-glass panels in sidebars and menu bar with solid fills. The result is a crisper, more defined interface - particularly useful on lower-brightness displays or when using dark mode in a bright room.
• Fine-grained brightness control. Hold Option + Shift while pressing F1 or F2 to adjust brightness in quarter-step increments rather than the standard full-step jumps. This is useful when you need to land on a specific luminance level for eye comfort.

For a broader collection of lesser-known appearance customisations: 12 Mac Appearance Tricks You Probably Didn't Know.

Automating Your Entire Mac Appearance with Solace

Every technique described in this guide can be used individually, but they are most powerful when combined into a single coherent system. That is what Solace is designed to do.

Solace is a macOS menu bar app that automates three elements of your Mac's appearance on a single schedule: dark mode switches at sunrise and sunset (or on a custom time); colour temperature shifts from neutral daytime clarity to warm evening tones using Night Shift under the hood; and wallpaper changes to match each appearance state. All three happen simultaneously, on a schedule that adapts to your actual local sunrise and sunset throughout the year.

The solar scheduler is the feature that separates Solace from a simple toggle. Rather than switching at a fixed clock time like "6pm," Solace calculates your local sunset based on your coordinates - so in summer, when sunset is at 9pm, your Mac stays in daylight mode until 9pm. In winter, when sunset is at 4pm, it switches earlier. The schedule is always accurate without any manual adjustment.

Weather awareness adds real-time responsiveness on top of the solar baseline. A cloudy afternoon can activate dark mode early; a clear evening can hold off until the sky actually dims. The combination of solar precision and weather responsiveness means Solace mirrors what is happening outside, rather than following an arbitrary clock schedule.

Solace is a one-time purchase at $4.99. It lives in your menu bar, requires macOS Sequoia or later, and includes a global keyboard shortcut for quickly toggling appearance when you need to override the schedule. There is no subscription, no account required, and no data collection.

Frequently asked questions