OK I changed to "install files directly" and the resulting screen says "Files succesfully copied to..." (spelling error: "successfully"

Launch Joomla Installer
The Launch Joomla Installer link, mysite.com/installation produces a 404 Not Found. I looked at the files on the server and the Joomla zip file is not unzipped and there is no "installation" file.
I appreciate your fast help!
I am browsing in FireFox on a Mac and can not use your desktop application.
RJ