Hi @Relot ,
Thanks for posting in Microsoft Q&A.
Unfortunately, IE Mode is not available on Microsoft Edge for MacOS. IE mode on Chromium-Edge is a Windows specific feature, and it relies on Internet Explorer 11 (IE11) to function. If you don’t have IE11 installed, IE Mode will not work.
What is Internet Explorer (IE) mode?
There is no direct way to download Internet Explorer (IE) on a Mac since Microsoft discontinued the development of IE for Mac in 2003. It's recommended to use IE mode on WindowsOS.
Thanks for your understanding.
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Best Regards,
Raina Zhao