The following solut ions can all be used with Sibelius 6.1, if for some reason you are unable to update to Sibel ius 6.2. Please note that after updating to Sibelius 6.2, if you need to run Sibelius 6 and Sibel ius 5 on the same computer, you should check Help Center art icle A636. The recommended solution is to upgrade to Sibelius 6.2, wh ich you can download here. This is caused by a problem with the fonts getting activated that is specif ic to Mac OS X. 617: Font characters do not appear correctly in Sibelius 6.1 on Mac OS X 10.4 Tiger, 10.5 Leopard and 10.6 Snow LeopardĪfter installing Sibelius 6.1 for the first time on a Mac running Mac OS X, you may encounter noteheads, clefs and other characters inside Sibelius do not appear correctly: either the wrong symbol may appear, or the symbols may actually be completely invis ible.