Tag Editor for MAC OS X allows to see and edit ID3 tags for unlimited number of files in one window by batches.
It supports ID3v1 and ID3v2 tags for MP3, WAV, AIFF, FLAC, and MP4 tags for MP4 and M4A (Apple lossless) files. Editable tags are Artwork, Title, Album, Artist, Genre, Track #, Year, BPM, Key, Grouping and Comment. You also can see and use Folder, File Name, Extension and other attributes of tracks for creation of tags.
Tag Editor allows see, edit, copy, paste, find, replace multiple tags in once through spreadsheet windows. It also helpful for cleaning tags of mess: fixing encoding, unifying case, removing extra spaces.
Tag Editor for MAC allows to paste artwork tags to multiple files from a browser, finder or using an audio file.