Adapted from:

7910634 {5462604:A6YALJG3} 1 chicago-fullnote-bibliography 50 default 1226 https://karljurgen.feuerherm.ca/wp-content/plugins/zotpress/
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Apple Support. “Reset NVRAM or PRAM on Your Mac.” Accessed November 14, 2020. https://support.apple.com/en-us/HT204063.

Nonvolatile random-access memory (NVRAM) is a small amount of memory that your Mac uses to store certain settings and access them quickly. Parameter RAM (PRAM) stores similar information, and the steps for resetting NVRAM and PRAM are the same.

Settings that can be stored in NVRAM include sound volume, display resolution, startup-disk selection, time zone, and recent kernel panic information. The settings stored in NVRAM depend on your Mac and the devices that you’re using with your Mac.