I've just released Mp3tag for Mac v1.4.3 with the following changes:
New
- Added support for importing
ISRC— International Standard Recording Codes — via MusicBrainz tag source. - Added
BARCODEandCATALOGNUMBERto default list of fields.
Changed, Improved & Fixed:
- Changed Discogs and MusicBrainz tag sources to use
CATALOGNUMBERinstead ofCATALOGIDto improve compatibility with other software. - Added workaround for non-null padding bytes for INFO subchunks in WAV and AIF.
- Action case conversion had no effect on directory name.
- Externally renamed folders with capitalization-only changes used previous capitalization on reload.