Cannot install lilypond on my MacBook

[Bob Pinschmidt]

I have downloaded 2.10.1911 multiple times for my MacBook running 10.4.8 and
 each time it tells me it can't archive into desktop because there is an error 
2 - no
 such file or directory.  I could download the PPC version and launch it, but 
for
 starters I could not get beyond the first page of the notes.

Thanks for the help.

Bob