What affects Mac OS X 10.6 Snow Leopard may be afflicting 10.5 Leopard too. Less than a month after updating Snow Leopard’s Migration Assistant to fix a problem migrating data to a new Mac running 10.7 Lion (see “Update Migration Assistant before Upgrading to Lion,” 19 July 2011), Apple has now released Migration Assistant Update for Mac OS X Leopard, which has almost exactly the same description:
This update addresses an issue with the Migration Assistant application in Mac OS X Leopard that prevents transfer of your personal data, settings, and compatible applications from a Mac running Mac OS X Leopard to a new Mac running Mac OS X Lion.
So if you’re running Leopard now, be sure to get this update before you move your data to a new Mac running Lion. We presume it will appear in Software Update if appropriate to your Mac; if not, download it from Apple’s site. (Free, 4.98 MB)