Hi All, 

Jumped into the Mac world and purchased a A2141 MacBook Pro recently.  Intel based
Not knowing much about Mac, as it suggested I updated to latest OS release Tahoe 26.1

Once updated, all functions worked other than built in sound. (headphones plugged in work fine)

On boot get the greeting sound, then a 'bing' as it logs in then nothing. 

If I pkill the audio coreaudiod process then I get some sound, but its very muffled (sounds like down a long tunnel) and only seems to be like left speaker sound.  

I have tried looking through forums and done the suggested resets etc, but no luck. 

I even signed up for 26.2 beta and installed that to see if there was a fix. 

Anyone else come across this? 
I am pondering, if even possible to wipe it, reinstall earlier OS release and just not upgrade? 

Any suggestions would be appreciated, as I am new to this and very lost. 

Thank You