Chosen Solution
Hello I have a Mac mini Late 2014, it works fine when im using it but cannot update OS not install new one, each time I try to do it, it comes with up error and points to running diagnostics due to a hardware fault. Ran diagnostics and came back with PPM002 error pointing to an issue with memory module (crappy onboard on this version of Mac mini so can’t replace). However when I Run a memory test software like Rember (I’ve tried a couple of others too) all memory tests come back with no issues. I’ve attached pics of the diagnostics screen as well as the memory tests. Any help is appreciated.
Sadly your logic board has a problem with one of the RAM modules.
