![]() ![]() While in Recovery Mode, you should open terminal and run csrutil disable. If you do have SIP enabled (and most do), the way to disable it is to boot into recovery mode which is done by restarting your MacBook while pressing ⌘ R. You can check SIP status in terminal with this command: csrutil status. If you haven't disabled SIP before 1, here's now. To set an nvram boot argument, SIP must be disabled. Here's the command: nvram boot-args="niog=1" To set up closed lid clamshell, it's necessary to change an nvram boot argument. In open-clamshell the fan peaks are much lower and high rpm rotation stops much more quickly. At load they spin off the charts in closed-clamshell and very slow to decrease speed. In closed-lid clamshell fans spin 2800rpm with the same set up. At idle fans now spin at 1900rpm with two external monitors. I've just set up open clamshell mode on my MacBook Pro 16" on Catalina and the same technique should work on Mojave. ![]()
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