Sierra High is more unstable than Win 10 on unsupported Mac Pro 5.1



I am s*ck of Sierra High. This new Os should be more stable than the previous. And El Capitan is a dream on my old and wonderful Mac Pro 5.1 (2012), 28GB, Sapphire HD 7950. And I am sorry to say BUT Windows 10 is more stable on one of my SSD's. Yeah I know unsupported and stuff. But Sierra High (10.13.3) is still unstable when I pull the tray where the Win 10 is. 


I tried to look in the System report in DiagnosticReports and it seems like a got 2600 seconds before meltdown. It looks like this;


rocess:               SiriNCService [613]

Path:                  /System/Library/CoreServices/ ntents/MacOS/SiriNCService


Version:      (

Build Info:            AssistantUIX-146002003001000~2

Code Type:             X86-64 (Native)

Parent Process:        ??? [1]

Responsible:           Siri [612]

User ID:               501



Date/Time:             2018-01-31 10:32:25.197 +0100

OS Version:            Mac OS X 10.13.3 (17D47)

Report Version:        12

Anonymous UUID:        6B7E1072-74AA-34C8-D269-9364B22C24D8





Time Awake Since Boot: 2600 seconds



System Integrity Protection: enabled



Crashed Thread:        5  Dispatch queue:



Exception Type:        EXC_BAD_ACCESS (SIGSEGV)

Exception Codes:       KERN_INVALID_ADDRESS at 0x0000000000000030

Exception Note:        EXC_CORPSE_NOTIFY



Termination Signal:    Segmentation fault: 11

Termination Reason:    Namespace SIGNAL, Code 0xb

Terminating Process:   exc handler [0]


And I have not even installed a single thing. Just out of the box Sierra High. Tried to activate Siri and played with her?? :-) and boom, all freeze. (Probably bad manners).


I have payed 8500 dollars for this machine, back in the days 2012. And I slowly looking at PC again.


Can anybody guide me? In what logs should I look? Which path should I take? Should I go to Genius Bar and dropp 10.000 dollars on the counter and wait a month. 


Best regards



Has invited:

howapple - hello

Favor from:

TRIM is enabled individually as it is a separate setting in each MacOS Install on each drive you are running.


If it runs better in Windows (which uses built-in TRIM) and better from a Hard drive than an SSD, you may have to methodically do this process for each boot SSD:


sudo trimforce enable

agree to the terms and the restart.

restart in Safe Mode to massively TRIM the unused blocks


then you can compare performance.

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