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1. NSProcessInfo

   NSProcessInfo *pi = [NSProcessInfo processInfo];
   
   NSLog(@"environment SHELL: %@", [[pi environment] objectForKey:@"SHELL"]);
   NSLog(@"globallyUniqueString: %@", [pi globallyUniqueString]);
   NSLog(@"hostName: %@", [pi hostName]);
   NSLog(@"processIdentifier: %d", [pi processIdentifier]);
   NSLog(@"processName: %@", [pi processName]);
   [pi setProcessName:@"MyProcessNewName"];
   NSLog(@"processName: %@", [pi processName]);
   NSLog(@"operatingSystem: %d", [pi operatingSystem]);
   NSLog(@"operatingSystemName: %@", [pi operatingSystemName]);
   NSLog(@"operatingSystemVersionString: %@", [pi operatingSystemVersionString]);
   NSLog(@"processorCount: %d", [pi processorCount]);
   NSLog(@"activeProcessorCount: %d", [pi activeProcessorCount]);
   NSLog(@"physicalMemory: %qu", [pi physicalMemory]);
   NSLog(@"args: %@", [pi arguments]);
   

   Output:

   environment SHELL: /bin/bash
   globallyUniqueString: F68E72F1-257C-4E93-B23D-BA3A0DD15603-47346-0001600092C640D8
   hostName: nst.local
   processIdentifier: 47346
   processName: Untitled
   processName: MyProcessNewName
   operatingSystem: 5
   operatingSystemName: NSMACHOperatingSystem
   operatingSystemVersionString: Version 10.5.4 (Build 9E17)
   processorCount: 2
   activeProcessorCount: 2
   physicalMemory: 2147483648
   args: (
       "/Library/XCodeBuilds/Debug/Untitled"
   )