Wanting to purchase mp3tag for macOS but I am having a few struggles

[ohrenkino]

@deadman36g

retrieve original release dates from either discogs

If the data is not present on the result page in discogs or Musicbrainz, then it cannot be retrieved.

@deadman36g

Renaming files. I assume this is a simple fix but here is what I trying to get
music/Aerosmith/[1994] Get a Grip/

What have you tried so far?
Perhaps an additional look at the documentation helps:

Rename Files and Import Tags from Files

Mp3tag provides a variety of possibilities to get tag information from parts of the filename or to rename files based on the information stored in the tag of a file. The base concept behind all converters in Mp3tag is the format string, which describes a pattern or template of a filename. A format string consists of any characters and predefined placeholders or scripting functions. Every placeholder begins with the percent sign %, followed by a tag field name and ends with the percent sign. …

@deadman36g

Is there a way currently to use synched lyrics with FLAC files?

As MP3tag only supports UNSYNCEDLYRICS you would have to resort to a different program to either look for this kind of data or to create it.
And then it is a feature of the player to properly display those lyrics.