I was also able to convert directly from FLAC to m4a using flac only, but the resulting files were twice as large. It seems flac doesn't apply any compression, whereas afconvert and ffmpeg compress the resulting files.
I was also able to convert directly from FLAC to m4a using flac only, but the resulting files were twice as large. It seems flac doesn't apply any compression, whereas afconvert and ffmpeg compress the resulting files.