whine

Hello all and thanks for having me! I’ve been lurking for a few weeks while I’ve been working on an iMac g4 M1 conversion mod. Big thanks to everyone who has contributed to this pool of knowledge - it is extraordinary! I hope this has not been asked before, I gave a good look but could not find...

Just had this happen to me. Made a phone call and instead of the regular ringing sound before it's picked up, I head a loud, high pitched whine. It stopped when I hung up, and the second time the audio was the expected ringing sound. I've never had this happen before, so I am a little concerned...

I've got a top-of-the-line 2015 MBPr. Oh, why did I ever thought to take the top model?! It kills me with unreasonable noise - as soon as dGPU is invoked it starts to whine, just watching a YT video, around very reasonable 60C - and 60-70% fanspeed. For nothing Even when I stop it, it makes...

Just got the stock 2.6GHz model and noticed coil whine while the system is booting, and when clicking buttons in System Preferences. This is after the Catalina 10.15.1 Supplemental Update was applied which specifically addresses issues with this model. I don't have time at the moment to...