Include "macOS" in ApplicationPlatform of Identification
It appears that in MXF files created with the macOS build of bmx, the ApplicationPlatform (aka "platform") field of the Identification is libMXF (Unknown). I think libMXF (macOS) (or similar) would be expected?
MXF files made using bmx on other platforms have values such as libMXF (Win32) or libMXF (Linux 64-bit)
~~Should be fixed by #84. This Github Action build has an additional Show Platform Name stage which has platform : libMXF (Darwin arm64). Previously it would've been platform : libMXF (Unknown)~~
The PR has been updated. It should now show libMXF (Darwin ARM) or (Darwin ARM64) for ARM and libMXF (Darwin) if the architecture is unknown. Some binaries are available from GHA here, including macOS universal binaries for ARM64 and x86_64.