Table of Contents
What macOS Lets You Customize
macOS is more restrictive than Windows or Linux when it comes to system-level customization — Apple controls the core UI tightly, and there is no equivalent to Windows' full theme system or Linux's interchangeable desktop environments. That said, there is a meaningful amount you can change through a combination of built-in settings and third-party tools, and macOS setups can look genuinely distinctive with the right approach.
The areas where you have real control are: wallpaper, dock behavior and appearance, menu bar item management, individual app icons, window snapping and management, desktop widgets, and terminal appearance. The areas where macOS is largely fixed are: system fonts, title bar style, window chrome, and the overall UI color scheme beyond Apple's provided accent colors. Understanding this boundary up front saves time and frustration.
Wallpaper Configuration
Set your wallpaper through System Settings → Wallpaper. macOS supports static images, dynamic wallpapers that shift based on time of day, and — on macOS Sonoma and later — slow-motion video wallpapers on supported hardware. For custom wallpapers, drag any image file into the Wallpaper settings or right-click an image in Finder and select Set Desktop Picture.
macOS displays are predominantly Retina — high-DPI panels where one logical pixel maps to two or four physical pixels. For a Retina display, your wallpaper resolution should be at least twice your display's logical resolution. A 14-inch MacBook Pro with a 2560x1664 logical resolution needs a wallpaper of at least that size — ideally 3840x2160 or higher — to look sharp. Using a low-resolution wallpaper on a Retina display is noticeably worse than on a standard display because the pixel doubling amplifies any softness.
For multi-desktop setups (Mission Control spaces), you can set a different wallpaper per space. Right-click the desktop in each space and select Change Wallpaper — this lets you create visually distinct workspaces for different contexts.
Dock Customization
The Dock has more built-in configuration options than most users explore. In System Settings → Desktop & Dock, you can set the Dock size and magnification, enable auto-hide, remove the recent applications section, and choose whether to show it on the bottom, left, or right side of the screen.
Auto-hide is the single most impactful Dock setting for aesthetic setups — it keeps the Dock invisible until you move the cursor to the screen edge, revealing the full wallpaper at all times. Enable it and set a short delay through the terminal: defaults write com.apple.dock autohide-delay -float 0 && killall Dock removes the default hide delay entirely.
To remove all default Dock icons and keep only the apps you actually use, right-click each unwanted icon → Options → Remove from Dock. A minimal Dock with five to eight icons looks significantly cleaner than the default configuration. Add a spacer between groups of apps with: defaults write com.apple.dock persistent-apps -array-add '{"tile-type"="spacer-tile";}' && killall Dock.
For more extensive Dock customization, HiDock is a free tool that adds multi-row Dock support, custom icon sizing, and additional layout options not available in System Settings. HiDock is available on the Mac App Store.
Menu Bar Management
The menu bar accumulates icons from every application that has a menu bar component, and an overcrowded menu bar makes the top of the screen feel cluttered. Managing it well is one of the highest-impact aesthetic changes on macOS.
On macOS Sonoma and later, you can hide individual menu bar icons by holding Cmd and dragging them off the menu bar. This is the simplest approach for reducing clutter without any additional tools.
Ice is a free, open-source menu bar manager available on GitHub that lets you hide groups of menu bar icons behind a single toggle icon. Click the toggle to reveal hidden items, click again to hide them. It is the best free alternative to Bartender (paid) and works on macOS Ventura and Sonoma. Install Ice from its GitHub releases page.
For the menu bar's visual appearance, enabling System Settings → Appearance → Automatically hide and show the menu bar makes it disappear when not needed, similar to the Dock auto-hide behavior. Combined with a full-screen-capable wallpaper, this gives the desktop a clean, uninterrupted look.
App Icon Replacement
Replacing individual app icons is one of the most distinctive customization options on macOS, and it is built into the OS — no third-party tool required for the basic operation. To replace an icon: find a custom icon in .icns or PNG format, open the app's Get Info panel (Cmd+I in Finder), and drag the new icon image onto the existing icon in the top-left corner of the Get Info panel. The icon updates immediately.
For curated icon sets designed for macOS, macOSicons.com has thousands of replacement icons for popular applications in a consistent style. Many icon sets follow Apple's design language — rounded square shape, depth and shadow matching system apps — so replaced icons feel native rather than out of place.
Pictogram is a free Mac app that manages custom icons more conveniently than the manual method, allowing you to apply, reset, and organize icon replacements for multiple applications from a single interface. It also handles icon resets after app updates, which would otherwise revert your custom icons.
For a cohesive look, choose one icon set and apply it across all your Dock applications rather than mixing styles from different packs.
Window Management
macOS does not have a native window snapping system comparable to Windows Snap or Linux tiling window managers. Third-party tools fill this gap.
Rectangle is the most widely used free window manager for macOS. It adds keyboard shortcuts and drag-to-edge snapping for common layouts: left half, right half, top half, bottom half, quarters, and maximized. Rectangle Pro (paid) adds more layout options and per-app window rules. Install Rectangle from rectangleapp.com.
Magnet (paid, Mac App Store) is similar to Rectangle with a slightly different interface and is a common alternative. For users who want a tiling window manager — where windows are automatically arranged without gaps, similar to i3 on Linux — Yabai is a free, open-source option that works on macOS but requires disabling System Integrity Protection for full functionality, which is an advanced configuration not recommended for most users.
Desktop Widgets
macOS Sonoma introduced interactive desktop widgets that sit on the desktop surface rather than in a separate Notification Center panel. Add them by right-clicking the desktop → Edit Widgets. Available widget categories include Clock, Calendar, Weather, Reminders, and widgets from third-party apps that support the WidgetKit API.
For more flexible widget placement and custom widget designs, Übersicht is a free tool that renders HTML, CSS, and JavaScript directly on the desktop surface. This allows fully custom widgets — any information you can fetch or calculate in JavaScript can be displayed as a styled widget anywhere on the desktop. Übersicht has a community library of pre-built widgets at tracesof.net/uebersicht-widgets.
Keep widget count minimal on macOS — the desktop is visible primarily when no windows are open, and one or two well-placed widgets are enough to add personality without cluttering the space.
Terminal Customization
The default macOS Terminal app is functional but visually basic. iTerm2 is the standard replacement — free, highly configurable, and with features the built-in terminal lacks: split panes, tab management, profile-based color schemes, and extensive keyboard shortcut configuration. Download from iterm2.com.
Install Oh My Zsh to extend the default Zsh shell with themes, plugins, and autocompletion. The installation command is available on the Oh My Zsh GitHub page and runs in a single line. Powerlevel10k is the most popular Oh My Zsh prompt theme — it displays git status, execution time, and current directory in a visually rich prompt that still renders fast.
Apply a color scheme to iTerm2 that matches your desktop palette. The iTerm2-Color-Schemes repository on GitHub has hundreds of schemes including Dracula, Nord, Catppuccin, and One Dark — import the .itermcolors file through iTerm2 Preferences → Profiles → Colors → Color Presets → Import.
Accent Colors and Dark Mode
System Settings → Appearance gives you control over two system-wide visual settings: Dark Mode and accent color. Dark Mode applies across all native macOS applications and system interfaces. Accent color changes the color of buttons, checkboxes, progress bars, and selected text throughout the OS — options include blue (default), purple, pink, red, orange, yellow, green, graphite, and multicolor.
The graphite accent color is particularly useful for aesthetic setups because it desaturates system UI elements to a neutral gray, making custom wallpapers and app colors the dominant visual elements rather than Apple's default blue. For dark setups, graphite accent plus dark mode creates the most neutral base for any custom color applied through wallpaper and accent elements.
Highlight color — the color applied to selected text — can be set independently under Appearance → Highlight color. Setting this to a custom color that matches your wallpaper's accent creates a small but satisfying level of coherence throughout the system.