No native dark mode or theme switching capability exists in the preferences.
While modern versions of Pro Tools (2023 and beyond) have finally embraced system-wide dark themes natively, users of an older, beloved workhorse——often feel left out in the cold (or rather, left out in the light ).
Apple introduced "Smart Invert" in macOS Mojave (10.14), but since 12.5 doesn't run on Mojave, you are stuck with or Accessibility Zoom .