Support older MacOS than 12

[kgoba]

Hi, for those of us still running older hardware perfectly capable of running BrewTarget, yet not supporting the newer MacOS, is there a reason to be limited to v2.3.0?

I was able to build BrewTarget v3.0.7 on MacOS 10.13. My steps:

1. Install MacPorts
2. Run sudo port install clang-16 xalanc xercesc3 boost179 qt513
3. Clone the brewtarget repository and create a build folder
4. Run CC=clang-mp-16 CXX=clang++-mp-16 cmake <path_to_repo> -DBoost_INCLUDE_DIR=/opt/local/libexec/boost/1.79/include
5. Run make -j4 or something similar.

Note that I might be missing some other dependencies I had installed prior via MacPorts. I guess cmake could be one of them.

[matty0ung]

Glad you got it working. If you are feeling adventurous, have a look at https://github.com/Brewtarget/brewtarget/blob/develop/bt

The intention is that, once you have Python installed, you can get everything else installed automatically by running ./bt setup all. I have not tried this on an older version of MacOS, but it's used on the nightly GitHub builds.

[matty0ung]

I'm going to close this ticket, but if you hit specific build problems in the future, please don't hesitate to open a new issue and I'll help as best I can. The main reason we don't offer packages for older MacOS versions is that they are not available via GitHub actions. Provided you have new enough versions of the things we depend on (compiler, Boost, Qt, CMake/Meson, etc) then there isn't any inherent reason against running on an older OS.