The PRAM reset stuff happens as part of the hardware self-check, long
before any boot loaders and other software is executed. What are the
advantages of resetting the PRAM? PRAM is used to hold a lot of little
details semi-permanently. Things related to which drive/partition to
boot, speaker/sound settings, display settings and more. If they get
mangled somehow your machine can start behaving badly while it goes on a
fruitless search for a drive which doesn't exist or route sound to
nowhere. So doing a resent puts things back to factory fresh. Exactly
what is stored on PRAM varies between Mac models. There is also the SMC
for System Management Controller on Intel Macs. The SMC controls things
like power, fans and system performance so you might want to try
resetting that as well. On a laptop you'll have to unplug it, pull the
battery and hold down the power button for 5 seconds to drain the last
bit of juice. That resets the SMC to factory.
CB
On 1/6/14 4:56 PM, Alex Hall wrote:
What if you have a boot manager? I have Refit installed, so will this work for
me or do I need to boot into Mac and then hold down the keys? Also, what
exactly are the advantages of doing this? I've heard a lot about it, but am not
sure why one might actually need to do it.
On Jan 6, 2014, at 12:53 PM, Chris Blouch <cblo...@aol.com> wrote:
Power down your machine, hold down command+option+P+R and keep holding them
while you power up the machine. You should hear the startup sound after a bit.
I usually keep them down until I've heard the startup sound a couple time -
maybe three or four - and then let off the keys to allow a normal startup.
CB
On 1/6/14 12:13 PM, Les Kriegler wrote:
Can someone explain the procedure to reset the Prams on a Mac? My system has
slowed down and I think this might help. I tried to search the archives, but
could not do so as I didn't find a link in the e-mail message to do so as is
the case with the iPhone list. Thanks.
Les
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