My wife just tried to install Skype on her Mac OSX computer.  Of course it didn’t work.  Nothing ever works on Macs it seems.

After lots of messing around I found some random suggestion on some forum to try this:

1. Quit Skype
2. Go to the folder “ ~/Library/Application Support/Skype/ “
3. Delete the file “shared.xml”
4. Start Skype

Amazingly, this worked.