I have a late 2013 15 inch MBP quad core 2.6 ghz, 256 gb, 16 gb, that geek benched at about 13900 for the multiple cores.
And then it started crashing every 5-7 minutes. I did all the stuff you are supposed to do, and had it thoroughly cleaned. It got a good bill of health from the Apple Support guy, and from my own diagnostics. But it still kept crashing. Screen went black, backlight and keyboard light would stay on for an additional 10-25 seconds, and then it would stop altogether. No logs, nothing. Just turned off.
Turned out it was the weird low voltage problem caused by the kernel extension---AppleThunderboltNHI.kext---. This affliction affects only two logic boards: 820-3662 Logic Board
and a 820-3787 Logic Board.
I could have done any of these things to fix it:
1. Boot Camped to Windows all the time
2. RUN IN safe mode all the time
3. kept an active ethernet cable in a thunderbolt port all the time
4. gone into the terminal and using sudo rm codes, removed the offending kext(and lost ethernet connections)
5. downloaded and ran permanently NOCRASHMBP
I chose # 5. I have not had a problem since. It keeps the MBP running all the time and uses about 2-3% of the CPU according to Activity monitor. It does this by preventing it from idling. It now has 30,000 to 35,000 idle wake ups per cpu second.
And the by-product of this is that my MBP now bench marks at 15269, making it the current 6th fastest macbook pro available, the same as a mid 2017, 2.9 ghz i7.
And then it started crashing every 5-7 minutes. I did all the stuff you are supposed to do, and had it thoroughly cleaned. It got a good bill of health from the Apple Support guy, and from my own diagnostics. But it still kept crashing. Screen went black, backlight and keyboard light would stay on for an additional 10-25 seconds, and then it would stop altogether. No logs, nothing. Just turned off.
Turned out it was the weird low voltage problem caused by the kernel extension---AppleThunderboltNHI.kext---. This affliction affects only two logic boards: 820-3662 Logic Board
and a 820-3787 Logic Board.
I could have done any of these things to fix it:
1. Boot Camped to Windows all the time
2. RUN IN safe mode all the time
3. kept an active ethernet cable in a thunderbolt port all the time
4. gone into the terminal and using sudo rm codes, removed the offending kext(and lost ethernet connections)
5. downloaded and ran permanently NOCRASHMBP
I chose # 5. I have not had a problem since. It keeps the MBP running all the time and uses about 2-3% of the CPU according to Activity monitor. It does this by preventing it from idling. It now has 30,000 to 35,000 idle wake ups per cpu second.
And the by-product of this is that my MBP now bench marks at 15269, making it the current 6th fastest macbook pro available, the same as a mid 2017, 2.9 ghz i7.
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