OptimalUnit

OptimalUnit is an intrusive Mac application that may sometimes be installed alongside other software without the user's knowing approval. The good news is that OptimalUnit is not threatening, and having it on your computer is not an immediate threat. However, this software might introduce unwanted changes to the way your Web browser behaves. For example, OptimalUnit is known to trigger redirects to low-quality search engines, as well as to regularly replace the browser's default new tab page and search engine.

The best way to keep Potentially Unwanted Programs (PUPs) like OptimalUnit away from your macOS device is to invest in reputable security software. It also is advisable to avoid interacting with shady files, which come from unknown sources.