My Mac (Leopard 10.5.6) is brand new and there are no LW4 old preferences since LW 4 was never on it. Also, since it's new, I doubt it needs any permissions repairing although I wouldn't mind trying that if I knew which is my start up disc (the one that says "Macintosh HD" or the one that says "149 GB Fujitsu...." clueless sorry. ;-(