While I was using Chrome or Firefox, I just installed a dark theme from their web store/add-ons page. As a result, Edge has now a light theme, which feels very ugly to look at. But since it is an older model (Late 2011), it cannot be upgraded to macOS Mojave (currently running High Sierra), which has support for in-builtĭark mode system-wide. After using the new Chromium based Edge on my windows PC for a while, I wanted to try it out on my mac as well.