You should consider getting SPAN Plus - it features the Import/Export function which makes such track spectrum comparisons easy. Some YouTube videos show how to do it in the free SPAN plug-in, but it applies only to some VST hosts like Ableton Live; not technically doable in a majority of other hosts.
Our latest macOS plug-in versions released after October, 2019 are Apple-notarized. The notarization requirement requires us to use some latest Apple development tools that do not produce applications compatible with previous macOS versions, and so the macOS 10.11 is now the oldest supported macOS version.