![]() Anyone have any idea what the issue could be? Any help would be greatly appreciated. ![]() I have tried a brand-new Mac keyboard and a new mouse (back in the day I had a Performa that kept crashing due to a bad Mac keyboard). I've also changed the internal CR2032 battery with a brand new one. I've tried bypassing a UPS and plugging it directly in the wall, no difference. If it was the logic board I would think that it would crash in safe mode, same for the power supply. So far, everything I see happening points to the Nvidia card that has been working perfectly until I updated to High Sierra, as far as I can tell that's when the problem began, although reverting to Sierra didn't help. I've since tested it and it does it every time when booted normally, if it stays on long enough to even start the process I haven't tried it in safe mode. The first time it shut down on me was when I was loading a stack of RAW photos in Photoshop CC 2019. I updated to Mojave hoping it might help but it didn't. Like I said, it has been running without issue for two years, until High Sierra. I also thought not having Adobe Creative Cloud manager installed might make a difference, but no. I had hoped that perhaps the drivers for the Nvidia card in Sierra were older and would work, but if so it didn't make any difference. The volume running Sierra OS was a completely fresh install without migrating any user files or settings, and no apps. I even booted from an external drive running High Sierra. I have booted from 4 different volumes, one SSD and one HDD running High Sierra, one SSD running Mojave, one SSD running Sierra. Essentially, I have booted with no unnecessary peripherals, no difference.įor the past two weeks I have been trying to solve this issue and isolate what is causing it, to no avail. Booting from an internal SATA SSD or HDD made no difference. I have 3 PCIe cards running aside from the display card, but I have several times removed them and booted without them and it didn't make any difference. Booting normally allowed me to install it, although the Mac crashed 4-5 times during installation! I tried to install Mojave when in safe boot mode and it told me there wasn't a video card that would work. Not sure if it's just because the Nvidia drivers aren't installed or what. However, one thing that keeps happening in safe boot mode is the screen sometimes flashes when performing certain tasks, like writing in Word. I've reloaded some of the start-up items (which by the way I disabled for normal booting, and I have disabled extensions as well-no difference when booting normally. I've been running for the past 36 hours or so without a crash in safe mode with High Sierra. Here's the most significant aspect as far as I can see: it does not shut down in safe mode when booting from any drive with any OS. ![]()
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