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.

No More Internet Explorer For Mac Os

• This question doesn’t get old. It never ceases to surprise me. When people get a Mac for the first time, they should be happy for not dealing with programs like Internet Explorer. But hey; I get it. Everyone has different preferences, and you may.
• More than once I have nudged a non-techie Windows user away from Internet Explorer by removing its icon from the Windows desktop, installing Chrome, changing the Chrome icon to IE's blue 'E'.
• Internet Explorer is a component of the Windows operating system and the most current version will continue to follow the specific support lifecycle policy for the operating system on which it is installed. Internet Explorer 11 will be supported for the life of Windows 7, Windows 8.1, and Windows 10.

If you are looking for browsers for the Mac besides Safari, consider Firefox, Brave, Opera, or Sea Monkey.

Once done, you can get into IE mode by opening the website you want to access in this mode, head to the Edge settings menu (the ) choose more tools and then open sites in Internet Explorer mode.

I just searched and saw this article, it might be of help

No More Internet Explorer For Macs

Internet Explorer For Mac

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.