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Clearing P-RAM and resetting the PMU are different
Macs' 'Parameter-RAM' and 'NonVolatle-RAM' are like a preferences files in firmware. Clearing the P-RAM is useful only when there is something corrupt written to this battery backed RAM. Holding down Apple+Option+P+R on boot will reset the P-RAM, and sometimes fix strange behavior such as failure to find the startup volume. P-RAM was used more extensively under Classic OS 9, and therefore was a primary troubleshooting step.
Clearing P-RAM and resetting the PMU are different
Just to fill in some fun backstory from WWDC this year...
Clearing P-RAM and resetting the PMU are different
Just to fill in some fun backstory from WWDC this year... |
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