Problem to use accent and other characters like "ç" on MACOS

I work in
macOS Catalina, version 10.15.7
whit
R 4.1.1 GUI 1.77 High Sierra build (7985)

Link the exemplo above, the characters "ç" and "ˆ" doesn't work

names(frutas)<-c("laranja","banana","maça","pêra")
frutas
laranja banana ma\303\247a p\303\252ra
1 2 3 4

And to use lab on the plot the characters doesn't work.

x<- c(1,2,3,4)
x
[1] 1 2 3 4
plot(x, ylab="Açai", xlab="Pêra")

If you perform File | Reoopen with encoding | UTF-8, then

x<- c(1,2,3,4)
x
#> [1] 1 2 3 4
plot(x, ylab="Açai", xlab="Pêra")

Hi technocrat!

Do you means something like this?

options(encoding="utf-8")
x<-c("é")
x
[1] "\303\251"

This way didn't work properly.

Ps: My hability in R is still in first steps.

Thank you for your tip

This is for use within the RStudio editor; alternatively, you can use a shell script to convert if you are doing multiple. The first part of the dialog is tricky to take a screen shot of the first part of the menu tree, but the final part looks like