Incorrect macOS installation instructions

[dbarros]

The bash snippet shown to install the fonts in macOS are incorrect:

$ cd util
$ bash ./install_macos.sh

It results in the errors:

cp: ./fonts/otf/*: No such file or directory
cp: ./fonts/variable/*: No such file or directory

The cd util is not required. To install it should just say:

bash util/install_macos.sh

And a minor one: it's "macOS" not "MacOS"