Remove UpgradeFilter (Mac OS X) virus

If you are getting notifications from UpgradeFilter, then your Mac is infected with adware. UpgradeFilter is adware for Mac. UpgradeFilter changes setting in your Mac. First, UpgradeFilter installs a browser extension in your browser. Then, after UpgradeFilter hijacks your browser, it modifies settings in the browser. For example, it changes the default home page, modifies

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