Unlike iOS, Mac OS X provides a lot of customization options. One of them is to change apps and folder icons. There's isn't any desperate need to do so, but it's good to keep things the way we like. It also serves the purpose of confusing people, in case you have colleagues or friends using your Mac without your permission.
They will waste their time searching for the app, as the icons would be changed to some random image. They'll have to hover their cursor on each and every app, to determine what is what. Anyways, moving ahead we that thought, we have detailed down the instructions on changing apps and folder icons, do have a look.
How to Change Apps and Folder Icons in Mac OS X
As far as this guide is concerned, we will use Desktop folder as example. The process remains the same for any other folder or app.
Step #1. Very first thing you.ll need to do is to select any image of your choice, which you wish to set as Desktop folder icon. In this guide, we will use image of iMac and copy it to the clipboard.
Step #2. Now Go to Home and open the Desktop folder by accessing GO menu or by using “Shift+Command+H” key combination in Finder.
Step #3. Right click the Desktop folder icon and select “Get Info”.
Step #4. On the info panel of the folder, click on the folder icon located at the upper-left corner.
Step #5. All you need to do now is to paste the image we copied in the first step.
You can repeat the same process for any folder.
For changing app icon on Mac, you'll need to access Application folder by looking for in Finder, then select any App for which you wish to change the icon.
Thereafter, right-click the app and select “Get Info” and click on the folder icon at upper-left of the info screen to select it. Now simply paste the image you wish to set as App icon. There are many websites which let you download icons and icon packs for Mac, search for it.