If your session has suddenly frozen or ended prematurely, and you are using a Mac, you may be experiencing an automatic time synchronization issue. A troubleshooting guide and full details of the issue can be found below.
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Troubleshooting guide
Check internet connection: Ensure a stable and reliable internet connection.
Verify time zone settings: Go to System Preferences > Date & Time and verify that the correct time zone is selected and that "Set time and date automatically" is enabled.
Remove/Reset timed configuration file: Open Terminal and use the command sudo rm -rf /var/db/timed/com.apple.timed.plist followed by a reboot.
Reset NVRAM: Shut down the Mac, then turn it on while holding down Option + Command + P + R until you hear the startup chime a second time. This resets NVRAM.
Check for resource issues: Review your storage usage, startup items, and running processes to identify potential performance bottlenecks.
Software updates: Make sure your macOS is up to date, as updates often include bug fixes for time-related issues.
Automatic time synchronization issues on Mac
Automatic time synchronization issues on a Mac can lead to discrepancies between the system clock and actual time, potentially affecting web timers and other applications that rely on accurate timekeeping. These issues can stem from various factors, including network connectivity problems, incorrect time server settings, or even malware interference. To resolve these issues, ensure your Mac is connected to the internet, verify that "Set time and date automatically" is enabled in Date & Time settings, and check that Location Services are correctly configured for time zone updates.
Internet connection
Macs rely on network time protocol (NTP) servers to automatically set the time. If the internet connection is unstable or slow, the synchronization process can be delayed or fail, leading to a time discrepancy.
Time zone settings
Incorrect time zone settings can also cause the time to jump when the system eventually synchronizes with the correct time zone.
System files
Corrupted or outdated time-related files (like com.apple.timed.plist) can interfere with the synchronization process. Removing or resetting these files might resolve the issue.
Other potential causes
NVRAM/PRAM battery
The PRAM battery on the logic board stores the system's clock settings. If it's failing, it might not maintain the correct time when the Mac is off, causing a time jump upon startup.
Software conflicts
In some cases, recently installed software or conflicting drivers can also disrupt the time synchronization process.
Resource issues
A Mac running slow due to low storage or excessive startup items can also indirectly affect the time synchronization if it prevents the system from accessing the necessary resources for the process.