So, I recently found a need to get Internet Explorer for use on my mac. I found that certain web apps at my office such as PeopleSoft and Authoria required IE and would not work with any other browser. On my PC i was able to get around that in Firefox using a add-on called ietab, but that was not an option on the mac.
Over at OSX Daily, I found the following that worked perfectly.
I also found that another option was to install wine and use wine bottler to install IE but was limited to ie7, however, this option was extremely simple as well.
Good luck 🙂