Q: How do I transfer my iWeb files to a new computer?

Place the domain file in your Home/Library/Application Support/iWeb folder.  If there's no iWeb folder create one and put it in there.  Now try to launch iWeb and see if it will find and open the Domain file.

If you still can't open the domain file do the following:

To open your domain file in Lion, Mountain Lion, Mavericks or Yosemite 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"

delay 1

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 in your Home/Library/Application Support/iWeb folder that 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.

NOTE: Since Lion the Home/Library folder is now invisible. To make it permanently visible enter the following in the Terminal application window: chflags nohidden ~/Library and press the Return key - 10.7: Un-hide the User Library folder.

 

For Mavericks and Yosemite go to your Home folder and use the View ➙ Show View Options menu to bring the this window:

Yes.  I use it frequently. You may have to turn off GateKeeper in the System/Security & Privacy preference pane to open the app for the first time, set it to Anywhere temporarily:

Or you can create your own app with Script Editor as described above .