Practice mode · free · unlimited · not certifiable
macOS System and Troubleshooting
Unscored tasks with hints and instant feedback. Practice results never become credentials.
Short lesson
macOS keyboard essentials · 6 min
Cmd+Space Spotlight · Ctrl+↑ Mission Control · Cmd+` cycle windows · Cmd+Shift+. hidden files · Cmd+Option+Esc force quit.
L1Privacy permissionsossim
In System Settings › Privacy & Security, allow camera access for Zoom and remove screen-recording access for “QuickRecorder” (an app you no longer use).
Sign up to practiseL3Diagnose a slow Macossim
The Mac is slow. In Activity Monitor quit the process hogging the CPU (it is not a system process), and remove the login items “Clean My Stuff” and “Promo Helper”.
Sign up to practiseL4Knowledge checkmcq
A Mac crashes at login after installing a third-party extension. What is a good first step?
Sign up to practiseL5Knowledge checkmcq
Company Macs show “This Mac is supervised and managed”. What does that mean for troubleshooting?
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