Customizing Catalina’s Desktop

You made it through the macOS Catalina installation, perhaps without any of the issues being reported by some users. Or if you did experience a few hiccups, you were able to resolve the issues and now Catalina is installed and working well for you.

With no thoughts of downgrading to a previous version of the Mac OS, it’s time to tackle one of the most important tasks you undertake when you upgrade to a new OS: customizing the operating system to better reflect your personality.

I specifically mentioned macOS Catalina because of a problem I encountered when changing icons on the Catalina desktop. This Rocket Yard guide includes a workaround for that specific problem.

These customization tips will work with just about any version of the Mac OS, so if you’re still running a stock-looking desktop, take a little bit of time and have some fun making the Mac desktop your own.

Customize Finder Preferences

One of the first customizations tasks I undertake is to change the Finder preferences to match up to how I like to work. For me, this includes displaying drives and connected devices on the desktop, opening new folders in windows and not tabs, selecting which items are visible in the Finder’s sidebar, and preventing a warning every time I empty the trash.

General tab for Finder Preferences.
Drives, servers, and iPods not showing up on your Desktop? Finder Preferences lets you make these devices visible on the Desktop.

Of course, the changes you may wish to make will be different, but the method for altering the Finder is the same.

From the File menu, select Open a New Finder window.

From the Finder menu, select Preferences.

The Finder Preferences window will open.

General Tab

Place a checkmark in the box for each item you want to have displayed on the Desktop. For me, that’s all of them: 

  • Hard disks
  • External disks
  • CDs, DVDs, and iPods
  • Connected servers

You can also select what directory will be displayed when a new Finder window is opened, and whether you prefer to open folders in tabs or a new window.

Tags Tab

You can choose which tags are displayed in the Finder Sidebar. Tags in the sidebar let you see any folder or file that you have marked with the same tag. It’s a good way of keeping track of projects that may have files scattered around in different places on your Mac.

Sidebar Tab

The Sidebar tab allows you to pick which items will be displayed within the sidebar. I like to have most of the items available in my sidebar, but that does lead to a crowded sidebar. You can place a checkmark in the ones you want to see.

Advanced Tab

The Advanced tab lets you control which warnings the Finder will display. I usually turn off the Show warning before emptying the Trash. I empty the trash often, and I don’t need to be told over and over what will happen when I empty the trash. You can instruct the Finder to:

  • Show all filename extensions
  • Show warning before changing an extension.
  • Show warning before removing from iCloud Drive
  • Show warning before emptying the Trash
  • Remove items from the Trash after 30 days
  • Keep folders on top:
    • In windows when sorting by name
    • On Desktop

The last item in the Advanced tab lets you select where to start searches from when using the Finder’s search feature. You can use the dropdown menu to select:

  • Search This Mac
  • Search the Current Folder
  • Use the Previous Search Scope

How to Change Drive and Folder Icons

One of my favorite customization projects is changing the icons used on drives, servers, and folders that are displayed on the desktop. Sometimes I even change them to match up to holiday themes, such as Halloween and Christmas. Regardless of the time of year, I like to jazz things up a bit on the desktop.

I noticed a bug in macOS Catalina that was preventing me from changing the drive icons. Though the bug was not consistent, one of my Macs has no issues changing icons, while another won’t change icons using the standard method.

Get Info windows showing thumbnail of current icon.
You can copy the icon from one Get Info window and paste it into another to change icons.

Let’s look at two methods for changing icons: 

The Standard Method

This is the method most of us have used for ages. Find an icon that is already being used, perhaps it’s an icon for a folder, a drive, or an icon you downloaded from the Internet. By the way, Other World Computing has a collection of drive icons you can download and use on your Mac. You can find them here: OWC Custom Drive Icons

You can also create your own custom icons with the Image2icon app, or for a bit of fun, do them manually.

Once you have the icon you wish to use on your Mac, right-click the icon and select Get Info from the popup menu.

Click the small icon thumbnail that is present at the top left-hand side of the Get Info window.

Once the thumbnail of the icon is highlighted, press the Command + C keys, or select Copy from the Finder’s Edit menu.

Right-click the drive or folder whose icon you wish to change.

Select Get Info from the popup menu.

Select the small icon thumbnail in the top left corner.

Press Command + V or select Paste from the Finder’s Edit menu.

Depending on the device whose icon you’re changing, you may be asked to provide an administrator password to complete the process.

The .ICNS Method

This is the method I was forced to use to change icons on my Mac that would not allow the usual copy/paste icon changing method outlined above. It isn’t any more difficult, but it does require that the icon you wish to use is in the form of an .icns file. This is a special graphics format for icons used on the Mac.

Drag .icns file to Get Info's icon thumbnail/
If the icon you wish to use is in .icns format, you can change icons by dragging the .icns file onto the Get Info window’s icon thumbnail.

Many icons you find on the Internet are available in the .icns file format. You can tell they are icon files because the file name will end in the .icns extension.

To change a drive or folder’s icon using an icns file, follow these steps:

Right-click the drive or folder whose icon you wish to change.

From the popup menu, select Get Info.

Drag the .icns file with the icon you wish to use and drop it onto the thumbnail icon at the top left of the Get Info window.

Depending on the device whose icon you’re changing, you may need to provide your administrator password to complete the change.

Convert Icons to .ICNS Files

If you have a number of icons saved as folders with the icon attached to them, you may need to convert them to .icns format to make use of them in macOS Catalina.

Luckily, Catalina ships with all the tools you need to do this.

Start by right-clicking the drive or folder whose icon you wish to copy to an .icns file.

Select the icon’s thumbnail at the top left of the Get Info window.

Once the thumbnail of the icon is highlighted, press Command + C or select Copy from the Finder’s Edit menu.

Preview app with pumpkin icon.
The Preview app can be used to convert images or icons into the .icns format.

Launch the Preview app, located in the /Applications folder.

When the Preview app opens it will display a window for you to select a file to open. Ignore that window.

Instead, from Preview’s File menu, select New From Clipboard.

The icon you copied in the previous step will open in its own Preview window.

From the File menu, select Save.

A Save dialog box will open. Give the icon a name, and select where you wish to save it to. Set the Format dropdown menu to ICNS and check the box labeled Alpha. When you’re ready, click the Save button.

You now have the icon saved in the .icns format for later use.

Change the Desktop Image

The last customization we’re going to do today is change the desktop image. macOS Catalina comes with a nice selection of desktop images you can use, including Dynamic desktops that change with the time of day.

You can select any of the Apple-supplied desktops, any of the images you have in your Photos library, or any image saved on your Mac.

To change the Desktop image, launch System Preferences by clicking its icon in the Dock or selecting System Preferences from the Apple Menu.

Select the Desktop & Screen Saver preference pane.

In the Desktop & Screen Saver window that opens, select the Desktop tab. Use the preference pane’s sidebar to select a category or location to view stored desktop pictures.

Desktop & Screen Saver preference pane.
You’re not limited to Apple-supplied desktop pictures; you can use any image you may have.

Select a desktop picture by clicking on the photo you wish to use.

Don’t forget you can use just about any image, including ones from your camera or downloaded from the Internet.

You can add a folder of images to the Desktop & Screen Saver preference pane by clicking on the plus (+) button in the bottom left of the window. Navigate to the folder that contains the image you wish to use, and then click the Choose button.

Customizing Fun

How have you customized the appearance of your Mac? I mentioned decorating the Desktop for holidays to help enhance the spirit of the season, but that’s just one reason to make changes to your Mac’s appearance. I’ve been known to get a bit carried away in the past, such as changing all the alert sounds or adding screen savers.

Halloween desktop to keep in the spirit of the autumn season.

Tell us what you’ve done to customize your Mac, in the comments below.



LEAVE A COMMENT


  • I’ve been trying to change some folder icons and I finally figured out how to get it to work (actually copying the IMAGE into the icon on Get Info). But the icons still have a white background although they are saved as PNG files with transparency in Photoshop. I’m running Mavericks, OS X 9.5. Does anyone know how to actually make it so the white background does not show, as it shouldn’t?




    • Is the white background only showing on the icon view (folder on the desktop for example), or when you copy and open the particular icon image again it has actually lost its transparency?




      • The first, I think. A white background shows up (even though the PNG had none in Photoshop). It appears in the Get Info window when I paste the PNG there from the image, as if it has lost its transparency, and then that white is in the new folder icon.




  • I had to add an admin account and change the privileges to “Read and Write” in order to change the icon on a Time Machine backup disk.




  • So I have installed Catalina 15.1.1 and custom icons is still broken for apps and shortcuts. It works only for web locations. Any thoughts, anyone?




  • Dear Tom, The method you suggest does not work for me. Catalina installed on my MacBook will not permit changes to icons of any kind even using a custom icns icon. This is a genuine OS bug. I have tested that by replicating the same problem on an iMac at a local Mac reseller. For that reason [I use custom icons for shortcuts to printer and scanner functions] and because SketchUp is not yet supported I have not installed Catalina on my iMac. Do you know if Catalina 10.15.1 will fix the bug?




  • I was having the same problem trying to restore my old drive icons. I did not know about ICNS files, and the app works like a charm. Thank you.