I downloaded it and tried it on my Mac running OS 10.13.8 (High Sierra). Unfortunately it wouldn’t run because the rugged bundle included in the build was built on os 10.15 and required a system dynamic library not included in OS 10.13
dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
Referenced from: /private/var/folders/td/fxpnmrsd57j266p2zsmd9_200000gn/T/AppTranslocation/6D97BF9E-2115-4EC3-A3A3-CED53EB8B99E/d/Sonic Pi 5.app/Contents/Resources/app/server/ruby/rb-native/2.7.0/rugged.bundle (which was built for Mac OS X 10.15)
Expected in: /usr/lib/libSystem.B.dylib
dyld: Symbol not found: ____chkstk_darwin
Referenced from: /private/var/folders/td/fxpnmrsd57j266p2zsmd9_200000gn/T/AppTranslocation/6D97BF9E-2115-4EC3-A3A3-CED53EB8B99E/d/Sonic Pi 5.app/Contents/Resources/app/server/ruby/rb-native/2.7.0/rugged.bundle (which was built for Mac OS X 10.15)
Expected in: /usr/lib/libSystem.B.dylib
On the positive side, I have just downloaded the latest SP source from github, and it builds OK on 10.13.3 when I build my own bundles using compile_extensions.rb This was using Ruby 2.6.4.
Also on a positive side, compile-extensions.rb now runs without a hitch on a Raspberry Pi4, removing the necessity for the kludge I had been using of installing rugged directly to the OS and then copying it across to Sonic Pi.
So currently I have the latest 3.2dev running on 10.3.6 and on Buster on a Pi4, both built this morning.