Pre-login launchd agent priority

I would like to know if there is a way to prioritize pre-login launchd agents?

No there is not.

I would likle to ensure a higher priority for my HelperTool.

I don't understand this. Priority with regards to what?

btw A lot of folks who ask this question end up wanting to run synchronously with respect to other parts of the login sequence, in which case the technique described in TN2228 Running At Login is the way to go.

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Ok, thank you; "ensure a higher priority", I want to make sure no other pre login agent runs before it. I dont want to run synchronously. I want to interrupt the log in process to apply software that might/will require a reboot.

Thanks,

Charlie