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Click Install.
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In some cases, Norton provides you an alert to join the Norton Community Watch that collects information about potential security risks from your computer and sends the information to Norton for analysis. Do any one of the following:
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Click Join Now to enable the Norton Community Watch on your Norton product.
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Click Maybe Later to join the Norton Community Watch later.
You can click Learn More to know more about Norton Community Watch.
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When prompted, type your Mac administrator user account password, and then click Install Helper.
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Click Restart.
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After you restart your Mac, in the Norton installation window, click Open Preferences.
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If you see the System Extension Blocked alert, click Open Security Preferences.
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In the Security & Privacy window, click the lock icon at the bottom.
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When prompted, type your administrator account password, and then click Unlock.
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Click Allow corresponding to the Norton message, navigate back to the Norton installation window, and then click Continue.
If you do not see the Allow button, then close and reopen the Security & Privacy window to view the Allow button.
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In the Norton installation window, click Continue, and then click Allow to allow Norton to monitor all the network activities and block malicious websites from accessing your Mac.
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In the Norton installation window, click Open Preferences to allow Norton to access your disk for better protection.
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In the Security & Privacy window, ensure that the Norton System Extension option is enabled. Navigate back to the Norton installation window and click Complete.