The only way I know to protect a zip with a password on OS X is using StuffIt Standard Edition ($ 50, FREE 30 DAYS TRIAL AVAILABLE)
You can download the trial herehttp://my.smithmicro.com/mac/stu...dard/
1. Once downloaded you will find an application called DropStuff in it. Double-click to open it.
2. Once you opened it you will see that you can choose different formats. Choose Zip.
3. At the bottom of the application window you will have to check the "Encrypt Archives" box.
4. Now drag&drop the folder you want to make a zip of into the application window.
5. A popup window will appear asking you which password you want to apply.
6. Zip will be created and that's it.
Note that the default unzipper of Mac OSX can't handle password protected zip files. To unzip such a file Mac users will have to download StuffIt Expander which can be downloaded for free here:http://my.smithmicro.com/mac/stu...nder/
Windows users shouldn't experience problems. (I guess this is the only thing that is better on Windows machines... Creating and opening passworded/encrypted zip files is much easier there)
Of course there are two other ideas:
First: you send the zip file without applying a password to it by e-mail to the people that are allowed to see it
Second: If it's too big to be sent by e-mail you could just upload it to your server and provide the link by e-mail to the people that are allowed to see the zip. When they click the link the download will start. This way you don't have a link to your file on your website.
If you have any further question don't hesitate to ask...