iWeb stores the data in a Domain.sties2 file whose default location is .Home Folder/Library/Application Support/iWeb.
Move this file to a folder on the other Mac and double click it to launch it in iWeb.
Managing domain files...
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I work with iweb and have several sites online. But I want to back up and also share it with another computer.
I've a poblem. I can't find Home Folder/Library/Application Support/iWeb. anymore. I think I have deleted the library one. It has to be somewhere, since I update mu website almost daily.
Maybe you can help me? thanks
It's difficult to tell where the file if it is "somewhere".
You might as well ask where the key of the front door is.
Anyway, see if this gets you further :
Have you upgraded to Lion? If so then in Lion the Library folder is now invisible. To make it permanently visible enter the following in the Terminal application window: chflags nohidden ~/Library and hit the Enter button - 10.7: Un-hide the User Library folder.
To open your domain file in Lion or to switch between multiple domain files Cyclosaurus has provided us with the following script that you can make into an Applescript application with Script Editor. Open Script Editor, copy and paste the script below into Script Editor's window and save as an application.
do shell script "/usr/bin/defaults write com.apple.iWeb iWebDefaultsDocumentPath -boolean no"
tell application "iWeb" to activate
You can download an already compiled version with this link: iWeb Switch Domain.
Just launch the application, find and select the domain file you want to open and it will open with iWeb. It modifies the iWeb preference file each time it's launched so one can switch between domain files.
WARNING: iWeb Switch Domain will overwrite an existing Domain.sites2 file if you select to create a new domain in the same folder. So rename your domain files once they've been created to something other than the default name.