If you get ads, popups, notifications from SystemsAccess, your Mac is infected with adware. SystemsAccess is adware for Mac.
SystemsAccess changes setting on your Mac. First, SystemsAccess installs a browser extension in your browser. Then, after SystemsAccess hijacks your browser, it modifies the settings in the browser. For example, it changes the default home page, modifies search results, and displays unwanted pop-ups in your browser.