'MGM Resorts recently identified a cybersecurity issue affecting some of the Company's systems,' the company announced on its profile page on X (formerly known as Twitter). MGM Resorts shuts down IT systems after cyberattack By Ionut Ilascu Septem02:54 PM 0 MGM Resorts International disclosed today that it is dealing with a cybersecurity issue that impacted some of its systems, including its main website, online reservations, and in-casino services, like ATMs, slot machines, and credit card machines.