![]() ![]() You can see how 'off' your clock is by looking at the contents of ntp.drift - for example, my file contains the following: -23.640 It uses adjtime to adjust the clock per the content of /var/db/ntp.drift. Pacemaker is the daemon responsible for managing the time in macOS. ![]() I assume it has some cleverness to avoid stepping the clock backwards but there is no way to tell. it polls the NTP periodically (15 minutes) and uses the settimeofday() system call to set the sytem clock. Timed appears to be a simple sntp client - i.e. Timed takes no arguments, and users should not launch it manually.Īccording to Apple Developer Forums user granada29 in the post ntpd, timed and chronyd in 10.13, timed performs the following: Timed also uses TMTimeSynthesizer, something which CoreTime on iOS uses to update the clock with but I'm unaware of its history on macOS:ĭon't run the timed binary yourself, as mentioned in the man page: Timed uses the time server set in /etc/ntp.conf, which by default is server $ sudo defaults read /var/db/timed/ TMLastSystemTime You can see how 'off' your clock is by looking at the contents of /var/db/timed/, under the TMLastSystemTime dictionary in the TMTimeError key and the TMScaleFactorError key. when Airplane Mode is disabled ( airplane mode changed: AirplaneMode false, which appears to be carried over from iOS).every 3600 seconds (StartInterval: 3600).when the daemon is loaded at boot (RunAtLoad: true).Timed is managed by the LaunchDaemon /System/Library/LaunchDaemons/. timed is also aware of power/battery conditions. Inputs are merged inside of timed, where it calculates uncertainty to facilitate scheduling proactive time jobs. Timed maintains system clock accuracy by synchronizing the clock with reference clocks via technologies like NTP. High Sierra uses timed, from /usr/libexec/timed, run by the system user _timed. Then run again to check if the error message is gone. Some people reported this was actually breaking the ntp synchronization. So if you get the error below when checking time: kod_init_kod_db(): Cannot open KoD db file /var/db/ntp-kod: No such file or directoryĬreate the file and change ownership to root. Out of the box, a tracking file is missing. To check and update your system time, you can call sntp directly. You can obtain any needed firmware update from either of these Apple KBase articles -Īrticle #58174 - iMac: When to Install Available Updatersīe sure that you acquire a retail package for OSX, and not a model-specific one.Mojave still uses timed, but ntpdate and the helpers ntpq are removed. ![]() Important - be sure you have updated the firmware in your machine before even trying to boot it to OSX, including OSX on an install CD. In either case, plan on having about 8GB of free space on the drive before installing OSX (in addition to install space, OSX runs best when it has about 5GB or more free space left over). Recommendation - Panther (OSX 10.3) is probably a better choice than Tiger (OSX 10.4) for your machine. Panther requires a minimum of 128MB RAM to install again, twice that is a more realistic minimum. You can increase the RAM in the machine - it can hold up to 1.0GB of RAM. Since your machine has but 192MB RAM right now, Tiger will not install on it at all. More to the point, Tiger requires 256MB RAM as a bare-bones minimum a more realistic minimum is twice that, 512MB. However, it is at the low end of acceptable models for Tiger and your machine speed is probably a bit low to get the best out of Tiger. Your iMac (Slot Loading) model is rated by Apple as suitable for either Panther or Tiger. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |