A newly discovered macOS bug can disable internet access on Macs after extended use. The issue appears after exactly 49 days, 17 hours, two minutes, and 47 seconds of uptime.
Although this sounds unusual, the fix is simple. Users only need to restart their Mac before reaching that time limit.
How the Bug Was Discovered
The issue was first identified by Photon, a service that connects AI tools to iMessage. The company noticed the problem while testing its own Mac servers.
After further testing, Photon confirmed that the bug affects all Mac devices. This includes both consumer laptops and high-end machines like Mac Studio.
What Causes the Problem
The root of the issue lies in how macOS tracks time. The system uses a 32-bit counter to measure uptime. Once this counter reaches its limit, it resets to zero.
At that point, the system struggles to manage network connections. Specifically, it fails to close old TCP connections properly.
As a result, these unused connections remain active. Over time, they consume all available resources. Eventually, the Mac cannot open new connections, and the network stops working.
Who Is Most Affected
Most everyday users may never notice the issue. Many people restart their devices regularly due to updates or routine use.
However, some systems run continuously for weeks. For example, servers, developer machines, and AI workstations often stay on for long periods. These setups face the highest risk.
Simple Fix and Future Solutions
Thankfully, the solution is straightforward. Restarting the Mac resets the internal timer and restores network access instantly.
Experts recommend restarting devices regularly to avoid the issue. Even a weekly reboot can prevent problems.
Meanwhile, developers are working on a long-term fix. Apple has also been contacted for comment.
What This Means for Users
This bug highlights how small system limits can cause major disruptions. While the impact may be limited, it still affects critical workflows.
Therefore, users should stay aware and take simple precautions. A quick restart may be all it takes to keep your Mac running smoothly.
