First, thanks for your answer. I will try to answer to your questions .
Why there were "several unsuccessful installations"? Could you tell us with more precision what you tried to install and in what way it was unsuccessful? The installer should work. Why did it not?
"several unsuccessful installations" meant that I tried to follow the guidelines for installing iffefit on macosX...This is not an upgrading but a first installation of OsX 10.4.5. I then downloaded the ifeffit-1.2.8-Mac10.4_pkg.dmg and installed the package in the Applications folder. First I simply double-clicked on the application "athena", it opened and closed immediately. I then tried to search for explanations on my own from the archives of the mailing list.... I found a message from Paul Fons (MAy 9 2005) and....I finally downloaded Tk-804.027 and re-install ifeffit without success.
What was installing it in a "temp" directory meant to do? It needs to go under /Library/Perl/. Anyway, you do NOT need to install perl/Tk yourself.
"Temp" refers to Paul Fons guidelines (May 9 2005)...I did not realize how "dark" this word was. If I don't need to install perl/Tk, these are good news.
Can't load '/Library/Perl/5.8.6/darwin-thread-multi-2level/auto/Tk/Tk.bundle' for module Tk: dlopen(/Library/Perl/5.8.6/darwin-thread-multi-2level/auto/Tk/Tk.bundle, 1): Library not loaded: /usr/X11R6/lib/libX11.6.dylib
From a terminal, what does ~> perl -e 'use Tk;'
report? It should return with no messages.
Exact, indeed there was no message, but when I tried to run athena and I had an error message (see following lines). xafs-guest:~ manue$ perl -e 'use Tk;' xafs-guest:~ manue$ athena Can't load '/Library/Perl/5.8.6/darwin-thread-multi-2level/auto/Ifeffit/Ifeffit.bundle' for module Ifeffit: dlopen(/Library/Perl/5.8.6/darwin-thread-multi-2level/auto/Ifeffit/Ifeffit.bundle, 1): Library not loaded: /usr/X11R6/lib/libX11.6.dylib Referenced from: /Library/Perl/5.8.6/darwin-thread-multi-2level/auto/Ifeffit/Ifeffit.bundle Reason: image not found at /System/Library/Perl/5.8.6/darwin-thread-multi-2level/DynaLoader.pm line 230. at /Applications/Ifeffit/bin/athena line 54 Compilation failed in require at /Applications/Ifeffit/bin/athena line 54. BEGIN failed--compilation aborted at /Applications/Ifeffit/bin/athena line 58. b) what is under /Applications/Ifeffit AND /Library/Perl Applications/ifeffit contains several folders "applescript, bin, examples, include, info, lib, man, pgplot and share" and the applications athena, artemis.... In System/Library/Perl there are a complete folder of Perl 5.8.6 and another folder called "Extras". In Perl 5.8.6/Darwin-thread-multi-2level/auto, I could not find "Ifeffit" and then even less "Ifeffit.bundle". What other precisions do you need?