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Is it possible to set OS X Leopard to update my system automatically at a specific time, just like Windows does? Right now the Updater randomly pops up when there are updates and I have to manually 'approve' them for download.

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up vote 3 down vote accepted

You can set up a cron job to do this. Let me find the command to run.

Look up the command softwareupdate and schedule a cron job to run it. -- Info on cron jobs.

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What is the exact command I should use? I am not all the familiar with cron – Josh Hunt Jul 16 '09 at 2:11

As root you can do:

crontab -e

Add this to install updates every Monday at 5PM:

# m  h  dom mon dow   command
  0 17   *   *   1   /usr/sbin/softwareupdate -i -a  >> /dev/null 2>&1
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If you go to System Preferences -> Software Update you can schedule how often to run. By default it will do an auto-update check once a week.

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