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