Hi Byron On Wednesday 12 May 2004 12:11 am, Byron Q. Desnoyers Winmill wrote: > Okay, I see what you are talking about. I did the 'otool -t -v' > bit over here and found the symbols. (I gather the 'li' is loading > the system call number into the register and 'sc' is the actual > call?) Yes > I added the following statements to detect the error (well, the > if/perror stuff, the rest belongs to the original author :). sem_init() definitely returns "Function not implemented" here too. sem_open() appears to work, although I don't know that it's particularly useful. Perhaps the best course of action would be to emulate the POSIX semaphore stuff with pthread mutexes and condition variables - like SDL does. > 10.3, stock. 10.2.8 here. But that obviously makes no difference. Cheers, Rich