SIP disallows my binaries to execute

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Level 1

140 points

SIP disallows my binaries to execute

Where does one place system-wide user binaries?

macOS 12.5.1 M1 Max

My Foundation-based "daemon" binary runs fine within Xcode and located in my own local directories, but when I try to place it into /opt/local/bin or /usr/local/bin, macOS SIP won't let it run from there:

proc 20514: load code signature error 2 for file "simprefix"

ASP: Security policy would not allow process: 20514, /usr/local/bin/simprefix

proc 20598: load code signature error 2 for file "simprefix"

ASP: Security policy would not allow process: 20598, /opt/local/bin/simprefix

Is there some attribute I'm supposed to grant the binary so it can be run?

Where are user binary files supposed to be placed for system-side use?

Mac Studio

Posted on Sep 23, 2022 5:08 PM

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Answer 1

Best reply

xnav

Level 5

7,089 points

Sep 24, 2022 6:27 AM in response to Transini

Perhaps this applies:

Apple Developer Documentation

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Answer 2

Barney-15E

Level 10

112,818 points

Sep 24, 2022 5:18 AM in response to Transini

I’m not sure it is SIP stopping it, but it is part of the security model.

Im not certain how to overcome it, but some ideas.

Did you set the user:group to root:wheel?

How is it supposed to start “system-wide?” Is it a daemon or user agent—those should be launched by launchd using a plist in /Library/LaunchDaemons or /Library/LaunchAgents.

BBEdit and Python install their tools there, but they are symlinks to other locations. They are root:wheel.

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Answer 3

etresoft

Level 8

46,560 points

Sep 24, 2022 5:56 AM in response to Transini

Transini wrote:

proc 20514: load code signature error 2 for file "simprefix"

ASP: Security policy would not allow process: 20514, /usr/local/bin/simprefix

proc 20598: load code signature error 2 for file "simprefix"

ASP: Security policy would not allow process: 20598, /opt/local/bin/simprefix

Is there some attribute I'm supposed to grant the binary so it can be run?

Where are user binary files supposed to be placed for system-side use?

As the error messages say, these executables need a signature.

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Answer 4

Transini Author

Level 1

140 points

Sep 24, 2022 12:38 PM in response to xnav

Yes, it was the Xcode app signing intricacies that prevented my binary from running from a system-wide location. The procedure outlined in the APD "Signing a Daemon with a Restricted Entitlement" works. I didn't realize things were so "locked down" these days that even a simple binary residing in /opt/local or /usr/local requires a signature.

Works great now. Thanks to all for your helpful replies!

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SIP disallows my binaries to execute

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