Synopsis
launchctl enable system/com.apple.sntpd
sntpd [-L] [-z state_file]
Description
sntpd is an SNTP server daemon, which can provide time synchronization services to clients such as timed(8).
The following options are available:
-L: Overwrite any existing state with a header describing a stratum 1 uncalibrated local clock. This is useful for starting a root (primary) server that doesn't use sntp(1) to synchronize with a higher stratum server.
-z state_file Specify where to get the header data from.
When unspecified, the default location is state.bin in the current working directory. When managed by launchd, the default system location is /var/sntpd/state.bin.
If the file does not exist, it will be created and populated with a template indicating that the server is unsynchronized.
Files
/var/sntpd/state.bin SNTP header data /System/Library/LaunchDaemons/com.apple.sntpd.plist launchd job
See Also
launchctl(1), sntp(1), clock_gettime(3), timed(8)
History
sntpd first appeared in macOS 11.1
Darwin October 16, 2020 Darwin