Macs face periodic network freeze due to kernel timer wrap
TL;DR Summary
A macOS XNU kernel timer wraps after 49 days, causing TCP connection cleanup to fail and effectively halting networking on affected Macs until they are restarted. Most users won’t hit the 49‑day window, but servers and long‑running Mac workflows can, so a restart restores connectivity and is recommended until Apple releases a fix. Photon documented the bug and says Apple is working on a remediation.
- Unless you reboot every once in a while, your Mac will get kicked offline every 49 days AppleInsider
- Apple MacBooks Lose Network Connectivity After 49.7 Days Due to macOS "Time Bomb" Bug TechPowerUp
- macOS has a 49.7-day networking time bomb built in that only a reboot fixes — comparison operation on unreliable time value stops machines dead in their tracks Tom's Hardware
- 'Time bomb' in macOS shuts down TCP in MacBook after 50 days of operation Mezha
- Kernel Bug: Integer Overflow in Apple's XNU Stops TCP Packets – with Long Uptime heise online
Reading Insights
Total Reads
0
Unique Readers
6
Time Saved
3 min
vs 3 min read
Condensed
89%
587 → 65 words
Want the full story? Read the original article
Read on AppleInsider