![]() Uptime - Show how long system has been running. Osascript - shutdown/restart via AppleScript. “Do all men kill the things they do not love?” ~ The Merchant of Venice Related macOS commands usr/libexec/upsshutdown - Run a command when the UPS shuts down. fastboot tells rc(8) not to run fsck when rebooting etc/nologin tells login not to let anyone log in A terminate signal is then sent to launchd to bring the system down to single-user state (dependingĪ scheduled shutdown can be canceled by killing the shutdown process (a SIGTERM should If `-' is supplied as an option, the warning message is read fromĪt intervals, becoming more frequent as apocalypse approaches and starting at ten hours before shutdown, warning messages are displayed on the terminals of all users logged in.Īt shutdown time a message is written in the system log, containing the time of shutdown, who initiated the shutdown and the reason. To users currently logged into the system. The first form brings the system down in number minutesĪnd the second at the absolute time specified.Īny other arguments comprise the warning message that is broadcast ![]() The year, month, and day may be defaulted to the current system May be the word now (indicating an immediate shutdown) or specify aįuture time in one of two formats: +number, or yymmddhhmm, where Time Time is the time at which shutdown will bring the system down and macOS uses this mode automatically with supported u The system is halted up until the point of removing system power, but waitsīefore removing power for 5 minutes so that an external UPS (uninterruptible s The system is put to sleep at the specified time. r The system is rebooted at the specified time. o If -h or -r is specified, shutdown will execute halt(8) or reboot(8) instead of n If the -o is specified, prevent the file system cache from being flushed by pass. The system multi-user with logins disabled (for all but super-user). The -k option does not actually halt the system, but leaves h The system is halted at the specified time. Hackers, and gurus, who would otherwise not bother with such niceties. Notify users when the system is shutting down, saving them from system administrators, Sometimes power issues can be caused by the SMC, so it makes sense to try resetting the SMC if you're having chronic shut down problems.Shutdown provides an automated shutdown procedure for super-users to nicely The System Management Controller (SMC) is responsible for low-level functions on your Mac, including power management, battery charging, and keyboard backlighting. Safe mode isn't the only alternative startup mode for your Mac, check out the full list of macOS boot modes and what they're used for. When you restart your computer, it will boot back into regular mode. Release the Shift key when you see the login window and log in as usual.Start up in safe mode, then restart normally. This doesnt change any settings, but the app forgets any windows that were open the last time you quit the app. Press the power button then immediately press and hold the Shift key (either one). Press and hold the Shift key while opening the app.Turn your Mac off (you may need to force shut down).Safe mode also deletes font, kernel, and system caches, along with a few other things. When you start your Mac in safe mode, the startup disk is scanned for issues and macOS will try to fix any problems that are detected. Restarting your Mac in safe mode may also help stop the problem from happening again in the future.
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