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How to fix Razer Synapse in Mac OSX 10.0 Yosemite

How to fix Razer Synapse in Mac OSX 10.0 Yosemite

Start Terminal.app and type:

sudo nvram boot-args="kext-dev-mode=1"

Verify that command works by typing:

sudo nvram -p | grep -i boot-args

You should see a line:

boot-args	kext-dev-mode=1

Now reboot. If you plug in your razer stuff after the reboot you should see the following in Console.app:

19/09/14 11:12:05,837 com.apple.kextd[19]: kext-dev-mode allowing invalid signature -67023 0xFFFFFFFFFFFEFA31 for kext "/System/Library/Extensions/RazerHid.kext"
@djak250

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djak250 commented Sep 19, 2014

You're the man! Been searching high and low to figure this out. Mind if I post this on Google Plus?

@tdegrunt

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tdegrunt commented Sep 19, 2014

Go ahead! Hopefully it's useful :)

@dmackerman

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dmackerman commented Oct 6, 2014

Sweet.

@dmackerman

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dmackerman commented Oct 6, 2014

EDIT: Doesn't work when plugged into TB display.

Also, seems that the lighting controls do nothing.

@Gary00

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Gary00 commented Oct 8, 2014

Ah wish I found this ages ago. Thank you. Also if at anytime you want to restore changes made just type 'sudo nvram -d boot-args'

@PaulNokel

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PaulNokel commented Mar 16, 2015

Disabling kext signing is not a fix for that. Doing that, you are disabling build in security. Now any third party kext file can be loaded. Razor needs to provide a correctly signed kext file.

@theon-m

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theon-m commented Dec 25, 2015

I am not permitted to the operation reboot in the terminal. Am I missing anything?

@CBroz1

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CBroz1 commented Aug 12, 2016

Can someone describe what this fix does?

@MTCoster

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MTCoster commented Aug 12, 2016

@Name153, This "fix" disables a part of macOS's built in security. Specifically, the part responsible for preventing malicious kernel extensions from being installed. A kernel extension (or kext) extends or otherwise modifies low level parts of the operating system. Enabling kext-dev-mode allows any kernel extension to be installed, not just those with valid certificates issued by Apple.

@Kevin060

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Kevin060 commented Oct 2, 2016

What do you mean by reboot

@cannonpalms

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cannonpalms commented Oct 14, 2016

By reboot, he means restart your computer.

@7hunderbird

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7hunderbird commented Feb 13, 2017

Use the plus button to find and allow the Razer Synapse as an application in the Security & Privacy > Accessibility settings. This will make it so Razer Synapse can do what it needs in order to make changes and run properly.

@chiggpatel1

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chiggpatel1 commented May 4, 2018

Hi, i have a problem with Razer Synapse 2.0.When ever i open it, it paused then closes. i have tried re installing twice with no luck. The older versions of Razer Synapse didn't give me this problem: How to Fix Razer Synapse Not Working On Windows 10

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