The Borgata Hotel Casino & Spa in Atlantic City is owned and operated by MGM Resorts International. (CBS/AP) - A 'cybersecurity issue' led to the shutdown of some casino and hotel computer systems at MGM Resorts International properties across the U.S., a company official reported Monday. Cybersecurity issue prompts computer shutdowns at MGM Resorts properties 00:29ĪTLANTIC CITY, N.J.