Several days ago I have upgraded my Mac OS X to Leopard. Looks that everything work correct, but there was the problem with my Nokia 5300. When I tried to sync I saw message “No device activated…”. After researching I found the issue and new version iSync plugin begins synchronization process for my Nokia and Mac. Life becomes easy.

Leopard version of iSync plugin for Nokia 5300 you can download here. Unpack archive, run the installer and restart iSync.

If you are still with Tiger read this article.