How to test app on Edge on Mac OS or Linux

Yes, using virtual machines. Microsoft provides VMs in a number of formats for exactly this reason.

You can download them here

If you are on Mac or Linux, you can use the following tools to test Edge for free:

Virtual Machines https://developer.microsoft.com/en-us/microsoft-edge/tools/vms/ You can get the virtual machines image to test Edge as well as IE6 to IE11 on all platforms Mac, Linux and Windows. You do need to have either Virtual Box, VMware or Vagrant to install the VM image.

RemoteIE https://dev.windows.com/en-us/microsoft-edge/tools/remote/ If you don't want to install VM image, try RemoteIE. The Remote client app is a small utility program that allows you to access Microsoft apps from the cloud. When you launch Internet Explorer from the Remote client app, a real preview version of the browser opens into a new window on your operating system, much like any other app you might have running. This version of Internet Explorer is modified to host the latest preview version of the EdgeHTML rendering engine, so you can test how your site will render in Microsoft Edge. It is available for Mac OS X, iOS, Android and Windows OS devices, and includes simple installation and account set up steps.