If you are seeking a list of boot arguments for use systems that are capable of running Apple’s Operating System, I would say look no further, but this is only what I have used personally over the years, so I may miss some new or have that is depreciated.
sudo nvram boot-arg="ADD BOOT ARGUMENTS HERE"
Enables Debugging of Kernel Extensions.
Limits the amount of RAM that is detected to boot OS X
Enables Single User Mode.
Enables Verbose Mode.
Enables Safe Mode.
Don’t forget that
sudo nvra -d boot-args will clear the NVRAM (non-volatile random-access memory), which is helpful when it becomes filled with arguments that you no longer need or cause undesired results.
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Technology Support Specialist at Sipylus
About The Author: Stephan Pringle is an Information Technology Support Specialist. He covers hardware and software and provides tips for you to troubleshoot and repair issues on your own. In his spare time, he writes articles about the State of New York on his Hackintosh and HackBook and that has helped him to become the top contributor of the New York City section of Yahoo! Answers.
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