>I still get the same errore after downloading the file again "invalid
>compressed data format violated 1
>  I took the file direcly from netbsd.org I downloade it as a binary and
>saved as gzip file  I tried also to used macgzip  after chabging the name
>of the file
>as base.12.tar.gzip but it didn't work it start uncompressing but it stoped
>with an errore message this is not a gzip file

In fetch, make sure you are not selecting "MacBinary", but you are using
the "Raw Data" format.  Also, don't change the filename. they should just
be base11, comp11, netbsd11, misc11, etc...make sure you download all of
them if you actually want stuff to work
good luck.
  - a