Finding out which version of Internet Explorer is installed on a computer is accomplished by navigating to the settings menu in the browser and selecting the “About Internet Explorer” option. Internet Explorer is the default Web browser for Windows computers, and it is often preinstalled.
Internet Explorer is updated regularly with new versions being automatically installed in computers with automatic Windows updates. The operating system installed on a computer determines which version of Internet Explorer can be installed, with older operating systems not able to support newer versions of Internet Explorer. Internet Explorer is not supported on OS X, the Macintosh operating system.