Chapter 1
Operating Systems
Course: 220 1202 Comptia A Exam Core 2
Subject: 220 1102 Comptia A Plus Exam Core 2
Chapter: Operating Systems
1. Installation and Uninstallation of Applications
File Types
- .dmg (Disk Image File): A disk image file that, when opened, mounts a virtual disk on the desktop. This file type is commonly used to distribute macOS applications. Users drag the application icon from the .dmg window into the Applications folder to install it. Real-Life Example: Downloading a web browser like Google Chrome for macOS typically comes as a .dmg file.
- .pkg (Package File): macOS installation packages often used by software developers to distribute applications or system updates. When run, .pkg files guide the user through an installation process with options for where to install the application and what components to include. Real-Life Example: Installing printer drivers or enterprise software frequently involves .pkg files.
- .app (Application File): The main executable application file found in the Applications folder. These files typically bundle all resources and executables for the application in a single package. Real-Life Example: The Safari web browser on macOS is stored as a .app file in the Applications folder.