Run Script every 30 Seconds on Mac

Question

I have created a cronjob that runs every 60 seconds which is not frequent enough for me. It is a simple command: wget localhost How can I run this commenad every 30, 16 seconds on my mac?

Answer 1

Run your command using launchd instead. Use the property list files in ~/Library/LaunchAgents/ and /System/Library/LaunchAgents/ as inspiration. Documentation on developer.apple.com.

To specify a launch interval of e.g. 30 seconds, use the following:

<key>StartInterval</key>
<integer>30</integer>

Answer 2

Write a bash script which runs every minute. Put the wget in a loop, or simply consecutive calls, with sleep 30 between each call.

Answer 3

You could try the following:

while true
do
<program>
sleep <time>
done

Replace and as appropriate.

Edit: When you're done needing to run ever seconds, Control+c will kill it.