sudo nvram boot-args="ncl=131072" unable to set permission denied on MAC STUDIO Monterey MAC OS any help for Peak throughput performance around 10 gigsTCP tuning

Hi Forums,

Looking for some help regarding the nvram settings sudo nvram

boot-args="ncl=131072" unable to set permission denied /

operation not permitted for the Peak data rates of around 10Gigs for TCP tuning that could help us

Any leads much appreciated! been struggling for 2 months

Urgent requirement

Mac

OS X TCP Performance Tuning | slaptijack

Regards

Deepak Sharma

Mac Studio, macOS 12.6

Posted on Nov 17, 2022 5:34 PM

Similar questions

2 replies

John Galt

Level 10

156,728 points

Nov 17, 2022 6:10 PM in response to deepak_devil

Most parameters may no longer be altered on Macs with Apple silicon. To the user, NVRAM may as well not exist on them.

Nov 19, 2022 6:01 PM in response to deepak_devil

I would be extremely careful using "nvram" utility on Apple Silicon Macs. I have seen a couple people post that it caused problems with their M1 Macs with one possibly being bricked. One of the users reporting an issue with their M1 Mac and the "nvram" utility seemed very knowledgeable and detail oriented. I don't recall specific details as the information was posted in 2020 shortly after the first M1 Macs were released. Unfortunately Apple is not great with documentation for these fringe utilities.

Keep in mind nvram settings details are fairly sparse even for Intel Macs.

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sudo nvram boot-args="ncl=131072" unable to set permission denied on MAC STUDIO Monterey MAC OS any help for Peak throughput performance around 10 gigsTCP tuning