[Fnoord]

Internet Explorer ran on macOS back when it was relevant. It got discontinued after Safari was released. Also, Internet Explorer was ported to various Unices. It just never got ported to a Linux-kernel based OS.

If software like this is FOSS, relies on open standards, and is designed architect independent it can be run on virtually anything. Including something which is rising in popularity.

[eropple]

Not only was there IE for Mac -- at the time, it was actually a pretty decent browser. Bit rotted over time, but there was a stretch when your choices were a really janky Netscape and IE for Mac, and the choice as I recall it was pretty easy.

[pseudosavant]

Not only was it pretty decent, it was far more standards compliant than the Windows IE. I don't think they actually shared much code wise. At least developing for IE on Mac felt like adding another browser to test.