I created several postscript fonts with Fontographer on the Mac back in the 1990s. I successfully converted them to OTF with FontConverter from the Apple App Store, but this did not change the fonts' names.
The problem is that FontBook on the Mac will not let me load the PS and the OTF versions of the fonts. It says the PS and OTF fonts are duplicates.
If I remove the PS version of the font from FontBook, the OTF version will load and work perfectly. However, I can then not open decades-old documents that I need to view and update without the PS version of the font being installed in the system.
I have found several programs that cost between $97 and $699, which might do the job, but they seem very complicated and are just overkill.
I just want to add "Pro" or "Std" to the existing OTF font name so that FontBook won't think the PS and OTF versions of the font are duplicates.
By the way, if you don't know, changing the name in the Finder does not work.