Open Radar

 
Area:
Something not on this list

Summary:
Starting with 10.12.4 SIP in MacOS prevents unloading of any LaunchD item from `/System`. While this is generally a good idea, for testing systems there are a number of items there that either pop up unexpectedly (sometimes breaking GUI scripting) or cause jitters that mess with performance numbers. A couple of examples would be `com.apple.notificationcenterui` and `com.apple.apsd`.

Additionally the `launchctl unload` command has been updated, and gives a descriptive error message, but the `launchctl disable` command does not seem to work for these and does not give any error message.

Steps to Reproduce:
`sudo launchctl unload -w /System/Library/LaunchAgents/com.apple.notificationcenterui.plist`
or
`sudo launchctl disable system/com.apple.notificationcenterui`

Expected Results:
That that process goes away, and does not come back on a reboot (the latter is not strictly required for my purposes).

Observed Results:
The first version has a descriptive error message, the latter does not. Neither shuts down the service.

Version:
Starting in 10.12.4. I have confirmed that 10.12.3 does not have this.

Notes:
I could switch off SIP, but that would make my testing less valid.

Configuration:
n/a