First, the Microsoft browser these days is Edge, not IE. IE is dead.
Second, if you want, or wanted in the past, to test on Internet Explorer without a Windows computer, you could just virtualize Windows. Windows can be legally virtualized on any hardware and on any host operating system.
Starting from 2013, you didn’t even need to pay for a Windows license to do that:
Are seriously asking with a straight face? Just do what a generation of people have done with Windows and run an unlicensed version of macOS. There's a whole generation of people who can recite Windows product keys off by heart. (FCKGW, anyone?) Entire empires of indie web development will have been done on improperly licensed versions of Windows.
As for people working in a serious professional corporation that cannot condone casual piracy, buy a Mac mini and expense it, or get an account on MacStadium.
The owner of whirlpool.net.au commenting on my comment.
I am replying because of the huge respect I have for the work.
Yes, I am seriously asking with a straight face.
Yes, I know how to pirate. I’m from this planet. :-D
Pirating, and jumping through hoops to do things certain vendors didn’t want done, was fun while I was learning. And educational. Super educational, in many respects.
But it is not fun anymore for me. There are other things these days that can get me banging my head against walls, and they are, in total, more fun and more educational.
Honest question. I’s < .5% market share and retired since 2023.