Steps to  Update Mac Software To Keep Files:

• Choose Apple menu > System Preferences, then click Software Update to obtain macOS software updates.
• Tip: You can also use the Apple menu to see how many updates are available, if any, next to System Preferences. To continue, select System Preferences.
• Click the Apple menu to update software downloaded from the App Store; the number of available updates, if any, is displayed next to App Store. To continue in the App Store app, select App Store.

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