You can download ID3 Editor 2.06 for Mac from our software library for free. The actual developer of this Mac application is Pa-software. The application is included in Audio & Video Tools.
From the developer:
ID3 Editor is a small and simple MP3 tag editor, which offers the ability to edit the most wanted attributes of the ID3 tags in one window. Although iTunes offers a good interface for editing tags, it does have a few important attributes missing, e.g. 'copyright' and 'encoded by' which is where ID3 Editor saves the day.
You may want to check out more Mac applications, such as ID3 Edit Pro - Music Tag Lite, Audio Edit - Trim ID3 Lite or Music Tag Edit Lite, which might be similar to ID3 Editor.