are you on the latest version of rhino for mac?
i’m not sure if this is what serbruba is referring to or not but:
a few versions ago: build 5A751
recent release: build 5A783
we used to be able to change the letters of the text in the properties->text panel… that editing field is no longer there.
edit- i suppose what i’m reporting is the same thing @Fred_W is noticing in his thread here: