I got the solution, I used this
NSFont *oldFont = [menu font];
NSLog(@"%@",oldFont.familyName);
and used like this
NSDictionary *attributes = @{
NSFontAttributeName:[NSFont fontWithName:@"Lucida Grande" size:14],
NSForegroundColorAttributeName: [NSColor blackColor],
NSParagraphStyleAttributeName:paragraphStyle
};