A cyberattack forced shutdown of two Mackay Sugar mills in North Queensland during the active crushing season, disrupting operational technology and process control systems in a food and agriculture critical infrastructure environment. No attack vector, threat actor, or IOCs have been publicly confirmed. The incident is significant as a sector signal: food production OT environments are active targets with limited detection and response capability, and timing during harvest season amplifies business impact beyond what a comparable IT-only incident would cause.