Internal Speakers stuck in headphone mode
"Internal speakers stuck in headphone mode: My internal speakers works on windows in MacBook Pro
but are stuck in headphone mode when I switch to Macos
Hi,
If your MacBook Pro has intel processor, resetting NVRAM could solve the audio related issues.
Reset NVRAM or PRAM on your Mac - Apple Support
Also see the following thread.
Internal speakers stuck in headphone mode - Apple Community