Testing Internet Explorer on MacOS has long been a challenge due to the browser's Windows exclusivity and its discontinuation by Microsoft in favor of Edge, which now uses Chrome’s Blink engine. Despite its decline, IE still holds a significant market share and necessitates cross-browser testing for web developers. The text explores various methods to facilitate IE testing on Macs, including using online cross-browser testing tools like LambdaTest, virtual machines, Microsoft Remote Desktop, and extensions like IE Tab. It also discusses alternative approaches such as WineBottler, Boot Camp Assistant, and Safari's in-built Develop menu, each with unique advantages and limitations. The necessity for these methods stems from historical shifts, where IE was once the default browser on Mac but was replaced by Safari due to compatibility and update delays, highlighting the ongoing importance of ensuring web compatibility across diverse platforms and browsers.