You can't.
MS stopped support in 2005 for Internet Explorer.
If you were running a virtual machine with Windows could you download Explorer for your Mac.
Run Internet Explorer on Mac without Windows. If you want to run Internet Explorer on Mac without installing Windows on it, some cloud browsing solutions allow you to access websites in IE from within any web browser. These solutions basically provide access to Internet Explorer, running on their Windows based servers, through a proxy. Adobe® Flash® Player is a lightweight browser plug-in and rich Internet application runtime that delivers consistent and engaging user experiences, stunning audio/video playback, and exciting gameplay. Installed on more than 1.3 billion systems, Flash Player is.
If you are looking for browsers for the Mac besides Safari, consider Firefox, Brave, Opera, or Sea Monkey.
I just searched and saw this article, it might be of help
Internet Explorer Free Download 10
If you are trying to reach a particular website that calls for IE, go into Preferences in Safari, go to Develop menu, select User Agent and select Internet Explorer 11. See if the website that you are trying to reach handles that.
