Mac installation problem

[Lenore Horner]

I thought I'd upgrade to the most recent version of LyX (from 1.3.3) on 
my iBook running 10.3.9.  I downloaded the binary, dragged the LyX icon 
to my Applications folder and then double clicked the LyX Installer 
icon whereupon I received the message: "The operation could not be 
completed.  An unexpected error occurred (error code -10660)."  Any 
suggestions?  A cursory trial of LyX shows that it runs and displays 
pdf output.  I'm rather surprised at that because it should be looking 
the wrong place for preferences I thought.   I didn't try editing a 
file.