Australia’s second-largest sugar producer, Mackay Sugar, is investigating a cyberattack that has disrupted parts of its operations and temporarily halted sugarcane harvesting in Queensland’s Mackay region. The Mackay Sugar security incident has led to the suspension of milling activities at two of the company’s facilities while cybersecurity specialists and authorities work to determine the nature and impact of the attack.
In a statement released on Wednesday, Mackay Sugar confirmed that it was responding to a cybersecurity incident affecting some of its operations. The sugar producer said its immediate priorities are ensuring the safety of employees, protecting operational systems, and maintaining business continuity during the investigation.
“Our immediate focus is the safety of our people, protecting operational systems, and maintaining business continuity,” the company said.
Mackay Sugar Security Incident Disrupts Key Operations
According to the company, specialist cybersecurity experts have been engaged to assist with the investigation and recovery efforts. Mackay Sugar also said it is working closely with relevant authorities to examine the incident and restore affected systems safely.
The Mackay Sugar security incident has had a direct impact on production activities. Local media reports indicated that the company was forced to shut down its Farleigh and Racecourse sugar mills, two major facilities located in Queensland’s Mackay region. As a result, growers were instructed to stop harvesting sugarcane until further notice.
Canegrowers Mackay, an organization representing local sugarcane farmers, confirmed the directive in a statement issued on Wednesday.

“Mackay Sugar has asked for all harvesting to cease immediately and not resume until further communication comes directly from the company,” the statement read.
The organization further confirmed that both sugar milling and cane haulage operations at the Farleigh and Racecourse mills had been suspended. The disruption comes shortly after both facilities commenced their annual sugarcane crushing season.
Growers Await Further Updates
While the shutdown has affected many growers in the region, producers in the Marian district have not experienced any immediate impact. According to a report from Australia’s ABC News, Mackay Sugar’s third mill, located in the district, is not scheduled to begin operations until next week.
The sugar producer said it has implemented interim processes and temporary measures to support essential business functions and reduce operational disruption while recovery efforts continue.
“Interim processes are in place to support critical business functions and minimise disruption where possible,” the company stated.
The company also emphasized that it is maintaining communication with employees, growers, and business partners throughout the incident.
“We are communicating directly with our employees, growers, and key partners and will continue to provide updates as more information becomes available,” Mackay Sugar said.
Investigation Continues as Details Remain Limited
At this stage, the sugar producer has not disclosed specific details about the cyberattack. The company has not indicated whether sensitive data was compromised or whether the incident involved ransomware or another form of malicious activity.
Mackay Sugar reiterated that it takes cybersecurity responsibilities seriously and acknowledged the uncertainty caused by the disruption.
“We take our responsibility to protect our systems, operations and information very seriously. We apologise for any disruption or uncertainty this incident may cause and we will provide timely updates as we continue our investigation,” the company said.
The ongoing Mackay Sugar security incident highlights the operational risks cyberattacks can pose to critical industries. As investigations continue, the company is focused on restoring systems safely while minimizing impacts on growers and production activities.
Mackay Sugar operates three mills and generates annual revenue exceeding $420 million. The sugar producer supplies raw sugar to domestic customers and international markets, including South Korea, Indonesia, Japan, and Malaysia. Further updates regarding the Mackay Sugar security incident are expected as the investigation progresses and additional information becomes available.

