I've set up
cron to run a script hourly but when I reboot cron does not work. Does this mean that I should run cron whenever I boot into my Mac? The cron command which I use
cron 5 * * * * path/to/script.sh. Is there any problem with cron or I this kind of behaviour expected?
You don't need to call
cron directly. Any commands you want to run need to be added to the
crontab of the user they should run as. You can edit your
crontab by running
or, if you are an admin user and want to edit the
crontab of another user,
crontab -u USERNAME -e
man 5 crontab for details about the format of the file, what kind of special commands you can use, and some samples.
5 * * * * /path/to/script seems to be ok though.
On macOS High Sierra (and perhaps earlier),
cron is disabled in some configurations. There is, however, still a LaunchDaemon for it.
Check to see if cron is enabled:
sudo launchctl list | grep cron
You should see
com.vix.cron.plist if cron is running. If cron is not running, you should do:
sudo launchctl load -w /System/Library/LaunchDaemons/com.vix.cron.plist
That will start
cron, and the
-w switch will make sure it starts after reboots as well.