SearchMainInfo is the name of a dodgy Web browser extension that appears only to target Mac users. Despite being safe to use, the SearchMainInfo extension is not an add-on you would want on your Mac. This Web browser extension is considered to be a PUP (Potentially Unwanted Program) due to the changes it applies to the user's settings. The main problem is that the SearchMainInfo extension would not get the user's explicit consent to apply the changes in question.
The SearchMainInfo extension goal is not to provide the users with excellent service but to hijack their Web browser. When the SearchMainInfo add-on is installed, it will set up the Safefinder.com site as a default new tab page. Whenever the user opens a new tab page, they will be redirected to the affiliated website. This way, the SearchMainInfo add-on aids the Safefinder.com website to generate traffic and revenue. While the Safefinder.com page is safe to use, it will not offer you high-quality service.
It is best to remove the SearchMainInfo Web browser extension from your Mac with the help of a legitimate, anti-spyware utility that will easily locate and remove the annoying PUP.