SandboxingI did the same for now. At the Developer forums I got this reply from someone who had the exact same issues with using sem_open in a Sandbox.
I'm on the lookout for any information about temporary exception entitlements that can be applied to named semaphores.
In keeping with the spirit of information wants to be free, I present here:http://reverse.put.as/wp-content/uploads/2011/09/Apple-Sandbox-Guide-v1.0.pdf
In particular, I'm looking for a solution that both works on 10.7.4 and Mountain Lion.
Here's an example of an entitlement for shared memory and semaphores:
Labels: entitlements, hacking osx, quarantine bit, sandbox
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