Thanks to System Integrity Protection (SIP)—an Apple security feature—personalizing your Mac with deep system tweaks is not possible. But there are still other ways to spruce up your macOS desktop.
On that note, let’s see how to customize your Mac in seven easy steps.
1. Start With a Brand New Wallpaper
Simply swapping the default wallpaper for a background you like can make your desktop feel new again. To make this tiny change, visit General > Desktop & Screen Saver > Desktop.
There, pick a fresh image from the default Mac desktop themes, or go with a nice solid background color. You can also select one of the options under the Dynamic Desktop section for a wallpaper that changes to match the time of the day.
Better yet, access your Photos library from the sidebar to set your wallpaper to a photograph you love and don’t mind seeing every day.
2. Set Up a Custom Color Scheme
Starting with macOS Mojave, you can mix and match various color presets for system accents and highlights to come up with a fresh color scheme. To do this, visit System Preferences > General. and pick new colors under Accent color and Highlight color. You’ll then see the updated color scheme reflected across buttons, boxes, menus, selections, and other system elements.
Since you can’t add system-wide themes to your Mac, your best bet is to activate app-specific themes. For example, if you use Alfred to control your Mac and have activated the Powerpack, you can use a custom theme to change how Alfred looks.
3. Add Icons and Backgrounds With Personality
You can not only scale icons up or down in Finder (via View > Show View Options > Icon size), but also change how they look using custom icons. When you’re browsing online repositories for icons, look for icons with the ICNS extension, which indicates that they’re in the Apple Icon Image format.
To change the icon for a folder (or a file), first copy the icon file. Now select the folder whose icon you’d like to replace and click on File > Get Info.
In the folder inspector that pops up, select the icon at the top and click on Edit > Paste. Now your custom icon is in place. If you’re not happy with it, select it in the inspector and hit the Delete key to switch back to the default icon.
PNG and JPG images can also work as the source for icons, but if you plan to use them, you have to open the image and copy-paste it to the folder inspector. Simply copying the image file doesn’t work.
You can even use an existing icon as the image source by copying it from the relevant inspector. For example, here’s a snapshot of my Home folder icon after I replaced it with the icon from the macOS Mojave installer.
Want to swap out the default app icons in the Applications folder for custom ones? You can, except for the apps that come bundled with your Mac. But you can use the icons of system apps as sources for third-party apps.
For example, you can replace the icon for your music player app with the system icon for iTunes. I have done that for VOX Music Player, as you’ll see in the screenshot below.
Did you know that you can add a new background to Finder from View > Show View Options > Background? This is possible only in the Icon view or “grid view” in Finder. (Not sure which view we’re referring to? We’ll help you get familiar with Finder view options.)
4. Revamp the Login Screen
To personalize the login screen on your Mac, start by switching to a new user picture for your account. You can do that from System Preferences > Users & Groups > Password. In this settings pane, click on the existing user picture next to your user name to swap it out for one from Apple’s default set or your Photos library. Hit Save to get the selected picture in place.
Next, you might want to come up with an entertaining lock screen message. You can add it under System Preferences > Security & Privacy > General. There, first select the checkbox for Show a message when the screen is locked.
(If the option appears grayed out, you’ll need to click on the lock icon at the bottom of the pane and enter your system password when prompted. This gives you access to the lock screen message setting.)
Next, click on the Set Lock Message button, type in what you want the lock screen to say, and hit OK. When you restart your Mac, you’ll see the message at the bottom of the screen, right above the power options.
5. Get a Better-Looking Dock
To personalize your Mac’s Dock, you should at the very least declutter it. Remove the icons of apps you don’t use often by dragging the icons out of the Dock and releasing them when you see the Remove prompt. Then, drag your favorite apps to the Dock from the Applications folder.
You can also reposition the Dock, resize its icons, and set them to magnify to various degrees on hover. To access the settings for these tweaks, head to System Preferences > Dock. Of course, instead of fiddling with the Dock, you could replace it with a third-party app like uBar or DockShelf.
6. Give Individual Apps a Makeover
Play around with the built-in settings for installed apps to add more personal touches to your Mac. For example, if you have the Slack desktop app installed, you can brighten up the Slack sidebar with a new theme.
In the Mac Mail app, change how your emails look by tweaking fonts and colors from Preferences > Fonts & Colors. Plus, you can highlight individual messages by selecting them and picking a new color via Format > Show Colors.
Get a new skin for the Terminal via Preferences > Profiles when you have it open. Select one of the themes available in the sidebar and click on Default at the bottom of the sidebar to set your choice as the default theme. You’ll need to restart Terminal for the new color profile to show up.
If you’re a dark mode enthusiast, how about enabling Dark Mode in your favorite Mac apps? Ulysses, Bear, Things, Tweetbot, Spark, and quite a few other apps support Dark Mode.
7. Add Custom Sounds to Mac
You don’t have to limit your personalization efforts to visual changes. How about adding a few audio tweaks too? For starters, pick a different system voice as the default from System Preferences > Accessibility > Speech > System Voice. Next, choose a new alert sound from System Preferences > Sound > Sound Effects.
You can even set your Mac to announce the time at set intervals from System Preferences > Date & Time > Clock.