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When You Should And How To Reset Mac PRAM / NVRAM

How To Reset Your PRAM

Often when troubleshooting a Mac we either reset the SMC?or we may have to resort to other troubleshooting techniques. We show you when you should and how to reset Mac PRAM.

What is PRAM? What is NVRAM?

PRAM stands for Parameter RAM, and it holds assorted information about your Mac so that it functions to spec according to Apple

NVRAM stands for Non Volatile Random Access Memory, and it serves the same purpose as PRAM in that it stores information on a memory chip pertaining to various features.

In no particular order, here are some things stored in PRAM / NVRAM

  • Startup disk
  • Disk caches
  • RAM disks
  • Video and display information including monitor depth, refresh rate, screen resolution, and number of colours
  • Volume for both system startup and speaker
  • Time zone information
  • Mouse and trackpad scaling and speed information
  • Keyboard repeat rate
  • Kernel Panic information
  • DVD region settings
  • Default system fonts
  • Virtual Memory (commonly called swap)

When do you want to reset PRAM / NVRAM?

You should reset the PRAM /NVRAM if you are experiencing issues with any of the above. The information will be cleared out so there are settings you will need to re-adjust

How Do I Reset The?PRAM / NVRAM?

Follow the key combination:

Reboot a Mac and then immediately hold down the Command+Option+P+R keys

see screenshot below:

When You Should And How To Reset Mac PRAM


If you are still experiencing issues you can try reset your SMC or contact us for further help.


About The Author
Carl Hamilton
Carl Hamilton
Entrepreneur, father, adventurer and looking to use education and technology to change the world.