My Ghostty configuration under macOS, in case it is handy as a starter point for anyone. As you can see, it has one macOS specific line, and my font of choice, Hermit.
# Theme
theme = iTerm2 Pastel Dark Background
# Mouse and cursor
cursor-style-blink = true
cursor-color = #33FF33
mouse-hide-while-typing = true
shell-integration-features = no-cursor
# Key bindings (tmux pane ALT arrow left/right)
# Unbind the default word-navigation behaviour
keybind = alt+left=unbind
keybind = alt+right=unbind
# Font
font-family = Hermit
font-size = 17
# Window and colours
background-opacity = 0.85
background-blur = 10
foreground = #33FF33
maximize = true
macos-titlebar-style = tabs
split-divider-color = #505050
unfocused-split-opacity = 0.5
window-padding-x = 20
window-padding-y = 20