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In this question, a response details that com.apple.loginwindow login hooks can be used to run script as root on user login.

I have followed the instructions by using

sudo defaults write com.apple.loginwindow LoginHook /Users/Shared/Test.sh

except nothing is executed on login. My script makes use of a small background process and nothing else and works by typing it into my terminal so I am lead to believe that it simply isn't possible anymore.

If this method (as it is already deprecated) no longer works, are there any method that currently work for running login scripts as root?

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  • Have you tried adding it to your crontab? – JMY1000 Jan 26 '20 at 19:18
  • @JMY1000 If by crontab you mean launchd agents, the answer in the link by mklement0 suggests it is run as the user logging in and not root. – agjertsen Jan 26 '20 at 19:27
  • I do not. I'll go ahead and post an answer. – JMY1000 Jan 26 '20 at 19:29
  • @JMY1000 Sorry, I don't actually know how to use it. I'm looking it up now though. – agjertsen Jan 26 '20 at 19:30
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    Does it need to run at login of a specific user, or at login of the first user to login, or at boot time? – nohillside Jan 26 '20 at 19:34
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I recommend using crontab.

Open the root user crontab (this will create a new crontab file if you don't have it):

sudo crontab -e

Add you command, with the time you want it to run in front (if you want to do it at a specific time, you can use this handy tool):

@reboot /Users/Shared/Test.sh

Exit and save the file.

That's it! Your command should now run whenever your computer starts up. While this isn't technically the same as on login, it should be enough for almost all intents and purposes.

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  • Trying this now. – agjertsen Jan 26 '20 at 19:39
  • This works perfectly so thank you! May I ask if there is also a way to do it on login rather than boot? – agjertsen Jan 26 '20 at 20:06
  • Unfortunately not that I know of, @nohillside might know of something that I don't. – JMY1000 Jan 26 '20 at 20:08

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