Uninstall Mac application might be unknown process, who are using windows system. As we know window giving only one way to uninstall app from control panel. But in the case of Mac there is no control panel for remove apps on Mac running on OS X 10.10 Yosemite, OS X EI Capitan, Mavericks and lion. So in Mac we can uninstall Mac Application with different ways like drag to trash icon, Using launch pad. Here we will see two different methods, let’s start with conventional method.
Note: In your Mac, we can only uninstall those apps, downloaded or installed from Mac app store or as a other third party app. We can’t uninstall official app like Mail, Safari, Keynotes, Messages, Pages and Numbers.
Don’t miss: Allow and share particular user account in Yosemite [How to]
Ways to Uninstall Mac Application using Launch Pad and Application: OS X Ei Capitan, Yosemite & Mavericks
1st : Uninstall Mac Application using Finder sidebar and Application root path folder
Step 1: By going this way, you can find all applications running on your device, So Navigate for /Applications.
Step 2: Choose App you want to uninstall or remove/ Delete completely from OS X Yosemite.
Step 3: Right click on it, and Choose “Move to trash” option. or Move it on Trash icon on your dashboard. Or Press Command + Delete keys for uninstall Mac Program.
You are done, Next lets see how to uninstall Apps on Mac using Launch Pad.
2nd: How to Uninstall Mac Application using Launch Pad
Step 1: Go to the Launch Pad,
Step 2: Next, Tap and hold app icon which you want to uninstall or remove.
Step 3: Now, icon will jiggle with cross icon on top right (X). Click on it to move it in trash. 
So simple, if you want get back all files and folders with deleted app, Just go Trash > Choose app you want it back (Put Back).
Generally, Most of the Application should stop Files, Cache, and Preference for future use or security. So we must have to delete it completely if you want more space consume by those apps.
Remove application support file at: ~/Library/Application Support/(App Name)
Remove Preference are stored at: ~/Library/Preferences/(App Name)
Cache are stored at: ~/Library/Caches/(App Name)
Any problem on removing or uninstall Mac Application then share with US, What you say: Which is easy process between OS X Ei Capitan,Mac OS X Yosemite (10.10), Mavericks (10.08), Lion and Windows.
