The AddUpgrade application is an adware that appears to be targeting Mac users. It is likely that the AddUpgrade tool has ended up on your system if you have downloaded software bundles or freeware recently. Often, users rush through the installation process of applications and do not notice everything they consent to. This is how most users end up housing adware on their systems.
The AddUpgrade utility is meant to inject advertisements in your browser. If you have adware installed on your Mac, you will notice a spike in the number of advertisements popping up every time you browse the Internet. This can become disruptive because the advertisements affiliated with the AddUpgrade adware are not only distracting but also may be in the way of various clickable content and menus on the websites you are visiting. This can prevent you from accessing all the content on the sites you are browsing. Ads that are spawned by adware tend to have an unsafe nature as they often push low-quality products or dodgy services such as illicit streaming platforms hosting pirated content, fake dating sites, dodgy gambling platforms, etc. The best you can do, in this case, is to avoid interaction with any advertisements affiliated with the AddUpgrade adware. The AddUpgrade application also may tamper with your Web browser’s settings. According to reports, this shady application tends to set the ‘akamaihd.net’ website as your default new tab page. This page hosts a basic search engine, which will not deliver organic results to your searches as it will likely promote sponsored content first and foremost.
If the AddUpgrade adware is present on your computer, it is best to use a genuine anti-virus application that will remove this pest from your system safely.