They did from 1996 to 2003 - and it was the default Mac browser for the last five of those years.
Microsoft chose to discontinue it, and as far as I am aware IE has never been available for Linux.
The dispute is not about bundling a browser but the integration of IE with the Windows OS (essentially that it cannot be uninstalled), the argument being that this stifles competition and holds back innovation. There are counter-arguments and Microsoft is sure to put them to the court.
My prediction: no lawyer will lose financially.