If you are getting notifications from CoinCycling, then your Mac is infected with adware. CoinCycling is adware for Mac.
CoinCycling changes setting in your Mac. First, CoinCycling installs a browser extension in your browser. Then, after CoinCycling 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.