Update –- 26 April 2011
Apple have released a fix for this problem, which is available now from Software Update. Read all about it.
Original post — 29 March 2011
If you are running Sibelius 6.2 on Mac OS X 10.6 Snow Leopard, beware that some users are reporting fairly serious problems relating to font handling in the latest update, Mac OS X 10.6.7, which was released last week.
Symptoms in Sibelius include text unexpectedly being coloured red, Magnetic Layout’s way of warning that it is colliding with something, even though it’s not, and magnetic slurs ending up in very strange, contorted shapes, again apparently as the result of trying to avoid a collision with something. Other symptoms, not limited to Sibelius but also occurring with other applications, include problems with font embedding in PDF files, or problems opening PDF files in applications like Adobe Reader or Adobe Acrobat (although Mac OS X’s built-in Preview application can normally open these PDFs without problems).
The underlying cause appears to be a change in the way Mac OS X handles OpenType fonts with PostScript outlines, and the music fonts supplied with Sibelius 6.2 are indeed in this particular format. The issue is discussed in some detail at TidBits.com.
If you find yourself affected by this problem, there are three known solutions available to you:
- Clean your system font caches, e.g. using a utility like OnyX, as described here.
- Switch to using the TrueType data fork fonts designed for use on Macs where Sibelius 6 and Sibelius 5 have to be co-installed, available here.
- Roll back to Mac OS X 10.6.6, which involves reinstalling from your retail Snow Leopard DVD-ROM or the system DVD-ROM you received with your Mac, then updating back up to Mac OS X 10.6.6 via the Update Combo.
For the time being, if you have the option, my recommendation would be to avoid the Mac OS X 10.6.7 update until a more permanent solution is made available.
We have notified Apple of this problem, and I expect several other software vendors have been in touch with them about it too. As more information becomes available, I will provide an update here.