bring to front

    NSWorkspace *workspace = [NSWorkspace sharedWorkspace];
    
    NSDictionary *activeAppDict = [workspace activeApplication];
    ProcessSerialNumber    psn;
    
    psn.highLongOfPSN = [[activeAppDict objectForKey:@"NSApplicationProcessSerialNumberHigh"] intValue];
    psn.lowLongOfPSN  = [[activeAppDict objectForKey:@"NSApplicationProcessSerialNumberLow"] intValue];
    
    SetFrontProcess( &psn );  
    
    // this .. causes a bit o' recursion for some reason.
    //ProcessSerialNumber xpsn = { 0, kCurrentProcess };
    //SetFrontProcess( & xpsn );