DX7 Librarian is a Macintosh program for managing voice data for DX7 synthesizer.

Features
Any voice parameter can be changed on Editor window having direct connection with DX7 over MIDI.

If your Macintosh have a connection with the Internet, you can access to “DX7 Librarian Official Database”.
Double clicking on a file in Database window, you can get the voice file on your Mac!
As you can see in the voice list here, the total number of registered voices is 14597 as of today.

You can submit your original voice file via e-mail just by choosing Submit item in File menu. Then the file will be appended into the Database within a few days.

License
Even without registration, DX7 Librarian will work for simple editing purpose. – It’s free!
If you want to have database connection, you need to have Database Access Key. To get the Key, you need to register. You can get 32 times trial access key for free just by sending registration e-mail from the application.
After the trial, you can buy 1000 times access key for US$10.
Alternatively, you can buy unlimited access key for US$30.

Requirement
Mac OS X 10.4.0 or newer.
(A user reported DX7 Librarian does NOT work on macOS Catalina 10.15.)
USB-MIDI interface.
Internet connection. (needed for Database access)

Warranty/Liability
DX7 Librarian is licensed on an “as is” basis. The author provides no warranty of any sort. The user of the software assumes complete responsibility for any direct or indirect damages due to use or misuse of the software.