[Whitehill]

I got rid of the log entries. First, remove this line from user whitehill's crontab:

*/5 * * * * /usr/bin/some_program param1 param2

That is, run the program every 5 minutes every day.

Now, create the file /Library/LaunchAgents/net.home.some.whitehill.plist with contents

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
        <key>Label</key>
        <string>net.home.some.whitehill</string>
        <key>UserName</key>
        <string>whitehill</string>
        <key>ProgramArguments</key>
        <array>
                <string>/usr/bin/some_program</string>
                <string>param1</string>
                <string>param2</string>
        </array>
        <key>StartInterval</key>
        <integer>300</integer>
</dict>
</plist>

Then run

launchctl load /Library/LaunchAgents/net.home.some.whitehill.plist

Wow! Isn't that so much simpler and easier?