File sharing between OSX Lion (10.7) and OSX Tiger (10.4) I recently purchased an iMac with OSX Lion already installed. My parents have an iMac running 10.4 Tiger. I have been trying to file share between the two but when I try to open the dropbox (from Tiger) it says I do not have permission, yet I cannot find anywhere on Tiger to grant the permission. 

I'm sure there is something simple and easy I am missing but I can't find it?
You can't open the Drop Box - just like a physical drop box. You can put files in it, but you can't open it or see what's there.

If you want to browse files on the Tiger machines, click "Connect as" and type in the username and password of an account on the Tiger machine.