Hi, while on MacOs X 10.6 and earlier this piece of code worked properly, on Lion I get a different result (bug). I have to take the MacAddress en0. May you please tell me where I do wrong? NSString *tempFilePath = @"/Users/john/OutCocoa.txt"; NSString *commandLine = [NSString stringWithFormat:@"/sbin/ifconfig en0 | grep ether | cut -d' ' -f 2 > \"%@\" 2>&1", tempFilePath]; sprintf(cmd, "/bin/sh -c %s", [commandLine UTF8String]); On Leopard this code returned the true en0 (good). On Lion this code returns 3 MacAddresses, where the en0 is the 3rd one (bug). I have fixed the bug just deleting the "/bin/sh -c " in front of the command, this way: sprintf(cmd, "%s", [commandLine UTF8String]); So now on Lion it works well too. My questions are: 1) Will it work well on any machine? 2) Will it work well on Leopard too? 3) Why do I get the bug on Lion only? Of course I am getting a lot of troubles with machines who are trying to run my app on Lion today...
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