Great news for all macOS users of MarcEdit by Terry Reese. Since MarcEdit 3 (for macOS) the application comes with its own command line tools!
In the past you had to install Mono and a copy of cmarcedit.exe, but now you can “talk” to the App directly. A command line to convert MarcXML to Marc21 would look roughly like this:
/Applications/MarcEdit3.app/Contents/MacOS/MarcEdit3 -s $f -d $OUTPUT$t.mrc -xmlmarc
In the above:
$f = full path to file to convert
$OUTPUT = the path to the output directory
$t = filename without extension
MarcEdit3 (macOS) now comes with its own Command Line
