MajorSearchLetter is another dubious application targeted at Mac users. No matter what features it may boast of having, the core functionality of the application is to act as a browser hijacker. Most Mac users may not even realize that the application is present on their devices. After all, it is extremely rare for programs of this type to spread through normal channels. Instead, they employ numerous deceptive tactics mostly designed to hide their installation. Some chose to packaged alongside a more popular app that users might want to install, while others are injected inside fake installers or updaters.
No matter how MajorSearchLetter managed to sneak itself onto your Mac, its presence there would be felt almost immediately. Browser hijackers establish control over the Web browser to generate traffic, and monetary gains in the process, towards a dubious or outright fake search engine. Users may notice that their homepage, new tab page, and the default search engine now open an unfamiliar address. Another functionality of the browser hijacker will then ensure that the settings will stay this way by blocking the user from making further modifications.
PUPs also are known for spying on the user's browsing activities. The applications may access the browsing history, search history, any clicked links, the device's IP address, geolocation, ISP and more. The gathered data will be transmitted to a remote server under the control of the application's operators regularly. The information may be exploited to deliver unwanted targeted advertisements or even offered for sale to any interested third parties.