Select right supercollider version for mac

[yaxu]

There are currently two different supercollider versions available for Mac, you have to pick the correct one. There is 'Mac OS 10.13 and later', and 'legacy' for supercollider 3.12.1.

Currently the installer is picking an older 3.11.2, for bigsur. It seems this doesn't work on the newest macos installs.

Currently it is installing a .zip. The newer packages are .dmgs. I don't know how to install these from the command line and don't have a mac to test.

So it would be great if someone could at minimum create and test two bootstrap scripts, one that installs the legacy supercollider, and one that installs the other one. Of course it should also install the sc3-plugins to match.

In a perfect world there would just be one script, that would check the OS version and install the right files.