Description is an address that Mac users could suddenly notice being opened by their browsers. This behavior is often a symptom of an intrusive PUP (Potentially Unwanted Program) with browser hijacker capabilities that have managed to sneak itself onto the Mac. PUPs are typically spread via specific distribution techniques designed to hide the fact that additional applications will be installed from the user. Some examples include shady software bundles or outright fake installers/updates.

Once activated on the system, the PUP could take over several important browser settings (homepage, new tab page, default search engine) and change them to now open a promoted website. In the vast majority of cases, the sponsored address belongs to a fake search engine that shows users results taken from other sources, either legitimate engines (Yahoo, Bing and Google) or dubious ones that generate low-quality and questionable results.

Another monetization scheme often observed in these invasive applications is running an ad campaign on the user's device. Known as adware, these applications can deliver numerous untrustworthy advertisements that could lead to unsafe websites, phishing portals, fake giveaways or sites spreading even more PUPs. Users also must keep in mind that most PUPs possess data-tracking routines. While present on the Mac, the applications may be collecting the browsing and search histories, clicked URLs, IP address, geolocation, browser type, device type and other far more sensitive information.