27-inch / 27" iMac Random Shut down

@Hank K -

Are you replying to someone specific? I started this particular post YEARS ago. Dude... if you haven't - you should thoroughly read through the entire posts before suggesting any possible solution.

When I posted this years ago - I had been working with Apple's upper tier tech support and indirectly with Apple engineers for MONTHS on two different occasions for TWO different iMacs.

My first iMac got replaced, and then, the newer spec's, replacement model was basically gutted and had all the main components replaced. To this day, I still have near overheating issues, but for the most part - it's fully operating.

With all that said - it's very safe to say that "safe mode" and "recovery mode" has been done, suggested, done again, and re-suggested.

@ElBartolomeo -

I had one of the very first 27", i7 iMacs. In fact, I preordered and then still ended up having to wait an extra month. Mine has an optic drive, which the newer ones don't and have additional, optional configurations, but it would seem Apple still hasn't figured out the issue that plagues the iMac.

I know you're not saying this, but... but as a former Apple employee I know Apple will 'never' say or call anything a "recall." They generally refer to a recall situation as a "repair extension programs" and they will always have those listed on their site, typically in the support area.

With that said - unless you can provide a knowledge base number of an extended repair program - you're absolutely incorrect about everything in your last reply. There is **NO** 'definitive solution' and to say so would be misleading to people. Not necessarily a power supply issue, and definitely not just a SMC issue.

I had this issue on TWO different iMacs and Apple never replaced the power supply, nor with any modified one. Now I admit - it's been (only) a couple years, but Apple could have changed their approach to this situation, but then again - I would ask you to provide an actual Apple post showing this.

In actuality - there really is no "one" solution, and unless documented otherwise BY Apple - they will treat every situation individually. It's a real pain in the ***, but as a former Apple Customer Relations employee - I can tell you that's the approach. I was painfully reminded of the "individual process" when I had to jump through all the Apple hoops, TWICE, for both of my iMacs.

Providing either of the links you gave to Apple feedback is not a preferred way to speak to support. In fact - it's merely a method of providing general feedback to Apple.

The best method is in fact is to speak with Apple tech support (of course - better if you have AppleCare or still in warranty) The next best resource is to get Customer Relations involved, and oddly enough, you'd be surprised how well an Apple Store will help. You're more likely to get action by talking with someone rather than through a feedback form in which you most likely will never hear back on.

And BTW - if you hadn't noticed - I'm the one who created and started this topic /string.