Mac OS X Leopard build 9B18

Mac OS X Leopard build 9B18 is a build of Mac OS X Leopard 10.5.1, released on 15 November 2007. This version shipped on most retail copies of Leopard in the first half of 2008 after the initial retail release as part of the second wave of prints, after which 10.5.4 took over in the third prints.