Modifying existing font but saving as new

Hey everyone,

So a friend wants to use a basic Helvetica Neue Bold but with certain characters replaced for branding purposes. I have the font and have edited the characters in it with glyphs.
I have also edited the font info as much as possible but when It saves and is added to the font book it still acts as if the regular helvetica is the master font & this si a “duplicate” to the bold setting.

How do I export this font as the master? I dont want it to show under the helvetica selection I just want it to show up as what I named it.

Thank you for any help. I am using a newer mac from last year with all the updates.

You have to change the Family and/or the Style name.

Then read this: