We'll cover how to reset PRAM on any Mac, as well as providing iMac, or a Mac Mini, or virtually any other Mac that has been made, the key.
Table of contents
- How to Reset PRAM on a Mac
- When you may need to reset PRAM and SMC on MacBook
- When Should You Reset SMC?
- How and when to reset your Mac’s PRAM and SMC
- Reset the System Management Controller (SMC)
Physically remove and re-insert the battery if it's removable Restart your computer. If the issue still isn't resolved after following these steps, you might need to reset the SMC. To reset the SMC: Shut down the computer. On the built-in keyboard, press the left side Shift-Control-Option keys and the power button at the same time. Release all the keys and the power button at the same time. Press the power button to turn on the computer. Disconnect the MagSafe power adapter from the computer if it's connected. Remove the battery. Press and hold the power button for five seconds.
Release the power button. Reconnect the battery and MagSafe power adapter. If the issue still isn't resolved after following these steps, you might need to reset the SMC. To reset the SMC: Shut down the computer. On the built-in keyboard, press the left side Shift-Control-Option keys and the power button at the same time. Release all the keys and the power button at the same time.
Press the power button to turn on the computer. Disconnect the MagSafe power adapter from the computer if it's connected. Remove the battery.
How to Reset PRAM on a Mac
Press and hold the power button for five seconds. Release the power button. Reconnect the battery and MagSafe power adapter. Unplug the power cord. Wait fifteen seconds. Attach the power cord.
When you may need to reset PRAM and SMC on MacBook
My video card has been replaced twice under Apple's warranty. After the 2nd replacement the computer was fine till the El Capitan install. The machine just reboots without warning. I have attached the kernel panic notice. I hope someone can help. This is a great computer but the problems driving me crazy. IOKitDriver 1.
Kernel version: Darwin Kernel Version System uptime in nanoseconds: last loaded kext at com. B23, 4 processors, Intel Core i7, 3.
When Should You Reset SMC?
I'm not technically adept enough to interpret the error message, but I'd say if you have continued problems, your best bet is to take it into a Genius Bar. They'll know what to do! Hello, I have since tried repairing the "permissions". In El Capitan, this is not easy to do, unlike previous versions. However thanks to instructions I found on the Internet, I did this and it seemed to do the trick. The downside is it seems after any update, I have to do it again.
However the computer seems to work OK between updates. I just recently had to go through the entire process again and after this the machine is working ok again. The local "Genius Bar's" are less "than" where I live. One did not even know how to remove the glass screen on my mid iMac 27"? It takes about 15 seconds and the only tool required is finger nails That's very strange. My best advice, then, is to take it to a different Genius Bar or somewhere else that has some expertise in fixing this type of problem.
How and when to reset your Mac’s PRAM and SMC
My laptop kept switching off and I took it to the Apple store. After more than a week, they told me I need to change the logic board and the Battery as the SCM memory was full and need to change it. I am very familiar that the apple store 1st solution would be to replace half components. Would you rest work with my laptop? I think its daylight robbery. I would highly appreciate if you could mention an alternate way fix this if the above method doesn't work.
You also fixed my dodgy trackpad which I didn't even know would be fixed by this. Thanks sooooo much, I owe you one. No problem! Really glad that it helped. My MacBook Pro has been acting weird, and today while in light use my acreen turned white with horizontal gray lines so I shit off and it now appears to turn on with a gray horizontal line screen and the gray bar below the logo only fills halfway and doesn't turn on.
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I'm in shock and scared the laptop is toast. Could you please guide me with what may be wrong with it and what is the safest next step? Apple has a special program going til Dec 31st where they will replace your logic board for free since and macbook pros have a common problem with the GPU.
Grey lines like that is the start of your GPU going bad.
Reset the System Management Controller (SMC)
I'd take it in and have it fixed for free while you still can. My Mac Mini claims it has a max capacity of 8 GB but crucial. Is this true? I've never heard of it working that way, but it certainly seems possible.
I'd give it a shot and see what happens. Thanks for this post, Dann. Hi all. Could this options solve my issue? Thank you.
- Anleitung: NVRAM, PRAM und SMC Reset am Mac – Zurücksetzen um Probleme zu lösen.
- Reset SMC of an iMac, Mac Pro, Mac Mini?
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- 1. Press C During Startup.
- Common PRAM/NVRAM And SMC Issues!
This happened to me after installing El Capitan, turns out my serial number was wiped from my computer and therefore I couldn't access those you mention. Also had trouble with switching my computer on etc.
I had to visit the Genius Bar at the Apple store and while they managed to rewrite my serial number, they couldn't work out why my computer would take multiple attempts of holding down a number of keys in order to switch on and suggested it was time to get a new one! They did not mention an SMC reset and did not attempt this. I came across the SMC reset from googling and it seems to have sorted out my macbook air.
Surely Apple should have told me about this, my macbook air showed all the signs of needing an SMC reset. Did they say how that might have happened? Glad that the SMC reset seemed to help—is your computer still working alright? And yes, I'm surprised that the guys at the Genius Bar didn't discuss that with you. Seems pretty likely that they would have known about the warning signs and potential fix. Unfortunately after posting this I had issues again where it would shut down when the progress bar was at a certain point. I paid someone to try and fix it he mentioned replacing the hard drive but all he did was wipe everything, including my serial number again.
It did work for a few days though and it still switches on alright but now where my wifi sign is it says wifi: no hardware installed. After looking online it seems the remedy for this is also smc reset which isn't working.
Apple don't understand how my serial number was wiped, the guy said he'd never seen it before but I only knew to check mine because of others it had happened to after installing El Capitan, he said it could possibly be due to that. This can indicate a failed or failing hard drive. Leaving a failing drive struggling too long can cause further damage. If you have a very old Mac with a non-spinning hard drive, more drastic measures may be required.
A groaning or buzzing sound that revs up and down at low RPM and sounds like a wounded animal could be a fan undergoing a slow death.