1.8 Explain common features and tools of the macOS/desktop operating system
📘CompTIA A+ Core 2 (220-1202)
macOS System Folders (CompTIA A+ Core 2 – Objective 1.8)
macOS uses a structured folder layout to store applications, user data, system files, and configuration settings.
Understanding these folders is important for:
- Installing and removing applications
- Managing user profiles
- Troubleshooting macOS issues
- Understanding permissions and security
- Supporting users in an IT environment
The exam expects you to recognize these folders, know their purpose, and understand what type of data is stored in each one.
1. /Applications
Purpose
The /Applications folder stores installed applications that are available to all users on the Mac.
Key Points
- Contains
.appapplication bundles - Applications here are accessible to every user account
- This is the default location for most macOS applications
- Applications installed via the App Store usually go here
What You Typically Find
- Safari
- System Preferences / System Settings
- Third-party applications like browsers, office software, and utilities
IT Environment Use
- IT administrators check this folder to verify installed software
- Used to confirm whether an application is installed system-wide
- Applications can be removed by dragging them from this folder to Trash (if supported)
Exam Tip
/Applications = system-wide applications for all users
2. /Users
Purpose
The /Users folder contains all user account folders on the Mac.
Key Points
- Each user account has its own folder
- Folder name usually matches the username
- User data is separated for privacy and security
What You Typically Find
/Users/admin/Users/student/Users/Shared(used for file sharing between users)
IT Environment Use
- User profiles are managed from this location
- Important for troubleshooting login or profile issues
- Backups often focus on user folders
Exam Tip
/Users = all user accounts on the system
3. /Library
Purpose
The /Library folder stores system-wide support files and settings used by macOS and applications.
Key Points
- Affects all users
- Contains shared resources and configuration data
- Not meant for regular user file storage
- Changes here often require administrator privileges
What You Typically Find
- Application Support files
- System extensions
- Fonts available to all users
- Caches and preferences used system-wide
IT Environment Use
- Troubleshooting application issues affecting all users
- Managing system-wide preferences
- Installing enterprise software that needs shared resources
Exam Tip
/Library = shared system resources for all users
4. /System
Purpose
The /System folder contains core macOS operating system files.
Key Points
- Essential for macOS to function
- Highly restricted and protected
- Not accessible for modification by normal users
- Protected by System Integrity Protection (SIP)
What You Typically Find
- macOS frameworks
- Kernel extensions
- System drivers
- Core system services
IT Environment Use
- IT staff normally do not modify this folder
- Used indirectly during OS updates or repairs
- Important for understanding why some files cannot be changed
Exam Tip
/System = critical macOS operating system files (do not modify)
5. /Users/Library (User Library Folder)
Purpose
Each user has a personal Library folder that stores user-specific settings and support files.
Key Points
- Located inside each user’s home folder
- Hidden by default in macOS
- Only affects the specific user account
Folder Path Example
/Users/username/Library
What You Typically Find
- User application preferences
- User-specific Application Support files
- Caches
- User-only fonts
IT Environment Use
- Troubleshooting problems affecting only one user
- Resetting application settings without affecting other users
- Managing per-user configurations
Exam Tip
/Users/Library = settings and support files for one user only
Important Comparison Summary (Exam-Friendly)
| Folder | Scope | Purpose |
|---|---|---|
/Applications | All users | Installed applications |
/Users | All users | User account folders |
/Library | All users | Shared system resources |
/System | System only | Core macOS files |
/Users/Library | Single user | User-specific settings |
Key Exam Points to Remember
- macOS separates system files, applications, and user data
/Libraryaffects all users/Users/Libraryaffects only one user/Systemis protected and should not be modified- Applications installed for everyone go in
/Applications
Why This Matters for the CompTIA A+ Exam
The exam tests your ability to:
- Identify macOS folder purposes
- Know where applications and settings are stored
- Understand user vs system-wide configurations
- Troubleshoot macOS issues logically
