Add download link to MuseScore 3.x unofficial build for older macOS versions
On the Download page, section Older and unsupported versions
Add a link to @mattmcclinch's GitHub page hosting the binaries for MuseScore 3.x for macOS 10.10 and 10.11
between section heading and the txt below it, e.g.
Older and unsupported versions
Current stable version - MuseScore 3.x
Previous stable version - MuseScore 2.3.2
(since everything under here is officially unsupported, it the type of "unsupported" (e.g. supported by the community vs too old to be supported by MuseScore.org) probably does not matter.
The alternative - of finding the link to the download page in a forum post or the #281472: MuseScore 3 does not run on macOS 10.10 & 10.11 , is too onerous.