Chalkboard is a font released by Apple in 2003. It was released as part of Mac OS X v10.3 and the 10.2.8 update. It is regularly compared to Microsoft's Comic Sans font, although it is not a perfect substitute font since the two are not metrically compatible. Comic Sans has shipped with Mac OS since Mac OS 8.6 in 1999. Although it is similar to the font Comic Sans, it is much less known and also less criticized.