You can use the Mac's Finder to connect to your MyWebSpace account. I
have this running in OS X 10.4 (Tiger) and have not tested it in
other versions of OS X.
Finder > Go > Connect to Server
Type https://mywebspace.wisc.edu/accountname (use your account name)
A Web Dav login box should appear where you should enter your (UW)
NetID and password.
A new volume will be mounted to your system and you can drag and drop
just like any other network storage volume! Yea!!