How to reinstall macOS - Apple Support (CA)

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Erase your Mac - Apple Support (CA)

Play games on your Mac - Apple Support (CA)

Official Apple Support

Use Disk Utility to erase an Intel-based Mac - Apple Support (CA)

No start up disk in recovery mode - Apple Community

Change your login picture on Mac - Apple Support (CA)

Restore your Mac - Apple Support (CA)

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How to reinstall macOS from macOS Recovery — Apple Support

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Move and arrange app windows on Mac - Apple Support (CA)