Finding an icon online is perfectly fine, but it's pretty simple to design your own folder icons, too. You could copy the default icon, paste it into an image editor, and change it to look however ...

Open the image you want to use for the folder's icon in Preview. Press Cmd+a (to select it) and then Cmd+c (to copy it). Back in the info panel, click on the icon in the top left corner and press ...

You can also select and copy (Edit -> Copy) a file or folder's icon in its Info panel for use elsewhere. Related Forums: macOS High Sierra, macOS Mojave, macOS Sierra. 29 comments.