In normal cases Mac users just need to simply drag and drop the target app to the Trash and then empty the Trash to perform the standard uninstallation. Uninstalling applications in macOS/Mac OS X is quite different from that in Windows operating system.
Things you should know about Mac app removal:
How to uninstall Facebook Messenger 1.0 on Mac computer? If you encounter problem when trying to delete Facebook Messenger 1.0 as well as its associated components, read through this removal tutorial and learn about how to perfectly remove any unwanted applications on your Mac. Tips to Perfectly Uninstall Facebook Messenger 1.0 on Mac OS X
