[Q] Mac Toolkit help please topic

I'm on the last step of mjphillips1981's mac toolkit for 4.4 rooting and it won't finish:

Code:

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Press ENTER to finish the SlapMyMoto process.
Open a new terminal window by pressing Command+N
In the new terminal window type the following command
./adb shell echo "/data/local/tmp/install.sh" > /sys/kernel/uevent_helper
Press ENTER when you have finished the above command

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I keep getting the error:

Code:

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-bash: /sys/kernel/uevent_helper: No such file or directory

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I've been at this all day :(