E-book Manual Restart For Mac

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Advertisement Sometimes your Mac might act strangely for no apparent reason: lights won’t work correctly, volume settings are messed up, the display resolution will change, or maybe your Mac won’t boot at all. You can solve some problems by closing all your apps and trying to restart the computer. Sometimes, though, you’ll need to reset the SMC, and PRAM or NVRAM. Let’s take a look at how to do each of them. What Is the SMC in a Mac? The system management controller—or SMC—is a chip in Intel-based Macs.

It’s involved in running a lot of the physical parts of the machine, including LED indicators, keyboards and other peripherals, cooling fans, and power buttons. It also plays a role in the behavior of your hard drive, how your Mac behaves in sleep mode, and the power supply. When Should You Reset SMC? SMC is responsible for so many functions in a Mac that it’s worth resetting whenever you find your computer’s hardware acting in unexpected ways.

Before you begin, try closing all your open apps and restarting your computer. That can fix a lot of problems on its own. Reset SMC on a MacBook Image Credit: To reset the SMC on a MacBook with the Apple T2 Security Chip (models from 2018 or later):. Shut down your Mac. Press and hold the power button for 10 seconds, then restart. If that doesn’t fix the problem, turn the Mac off again.

Press and hold the right Shift key, the left Option key, and the left Control key for seven seconds. Keep these keys pressed while you press and hold the Power button for seven seconds. Release all the keys and wait a few seconds. Now restart your MacBook.

To reset the SMC on a MacBook with a non-removable battery (mostly pre-2018). Shut down your Mac. Press and hold Shift, Control, and Option on the left side of the keyboard. Now press and hold the Power button (or Touch ID button) as well.

E-book Manual Restart For Mac Download

Hold all the keys down for 10 seconds. Release all the keys and turn on your MacBook. To reset the SMC on an older MacBook with a removable battery (mostly pre-2015):. Shut down your Mac. Remove the battery.

Press and hold the power button for five seconds. Reconnect the battery and turn on your MacBook. Reset SMC on an iMac, Mac Mini, or Mac Pro Image Credit: To reset the SMC on a desktop Mac with a T2 Chip (such as an iMac Pro):. Shut down your Mac.

Hold the power button down for 10 seconds. Release the power button, wait a few seconds, then restart the computer.

If the problem hasn’t gone away, turn off your Mac again. Unplug the power cord. Wait 15 seconds. Reconnect the power cord and wait five seconds. Turn on your Mac. To reset the SMC on older desktop Macs (mostly pre-2018).

Shut down your Mac. Unplug the power cord. Wait 15 seconds. Reconnect the power cord and wait five seconds. Turn on your Mac.

What Are PRAM and NVRAM in a Mac? PRAM (parameter random access memory) and NVRAM (non-volatile random access memory) hold information about the configuration of a Mac. This includes aspects like the date and time, as well as desktop, volume, mouse, and other control settings. These areas of memory are powered by a small battery, so these settings don’t get lost every time you turn your computer off. Modern Intel-based Macs have NVRAM, while older PowerPC models have PRAM.

You might see people refer to PRAM when they actually mean NVRAM. It doesn’t really matter—they have the same function, and you reset them both in the same way. When Should You Reset the PRAM or NVRAM?

Problems with the PRAM or NVRAM are often software-related. Your computer might forget certain settings, or could run into connectivity problems. You can try a PRAM reset when you experience any of these symptoms.

Volume doesn’t respond properly. The boot volume isn’t set (you’ll see a question mark before your computer boots up). Strange. Keyboard not responding normally. The time zone or clock is wrong.

Display resolution changes or won’t change. AirPort problems. Your computer shuts down slowly How to Reset PRAM or NVRAM on a Mac You don’t need to know if your Mac has NVRAM or PRAM, as the process to reset both is the same:. Shut down your Mac. Press the power button. Before the grey screen appears, press the Command, Option, P, and R keys at the same time.

Hold the keys until your computer restarts and you hear the startup sound a second time. On Macs with the T2 Security Chip, hold the keys until the Apple logo appears and disappears for the second time. Release the keys. After you reset the NVRAM or PRAM, you might notice that some of your settings are lost, such as the time, volume, mouse settings, and keyboard preferences. If you remember your previous computer settings, you should be able to get it back to normal in just a couple of minutes. More Common Mac Problems to Fix While you shouldn’t have to reset your Mac on a regular basis, it’s still good to know what this does and how to go about fixing issues that you may come across. It’s not a miracle cure, though.

You’ll need other solutions to, and there are lots of tools to help you Every Mac user should keep these 8 tools around to fix any problems that may arise, like malware, hardware issues, and more. Image credit: Stokkete/ Explore more about:,. Hello, First time post, so my apologies if I have posted in the wrong area. But my Mid 2011 27' iMac is doing the spontaneous reboot thing as well. This only started after I did a clean El Capitan install. 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. Usually daily, once or maybe twice. I have reset the NVRAM and SMC. I have attached the kernel panic notice. I hope someone can help. This is a great computer but the problems driving me crazy.

Thanks in advance. 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 2011 iMac 27'? It takes about 15 seconds and the only tool required is finger nails. Hi Dann, 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 do not feel the need to pay $800 more dollars to a laptop which i just bought 2 years ago. 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.

Thanks and Regards Shahin. Hello, I realize this post is a couple of years old. My 2011 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. I just follow your reset instructions for PRAM & SMC and nothing changes, no improvements. 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?

Thank you, G. 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. 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. I think my MacBook has had it, if Apple can't help me I don't know how to find someone who can.

A few months ago I bought a USB hub, after plugging it in, my USB ports actted a little funny. Moving what was plugged in around and restarting seemed to fix it. But now when ever my computer goes into deep sleep or shits off, the fan kicks into high speed mode. I have done PRAM and SMC restarts with no fix. I had the same issue with my old iMac (2007) but back then you reset your SMC by holding down your power button for 15 secs. This new method for the new computers, I don't think it works 100% of the time. And as my computer is out of warrenty, plus a lack of funds taking it to a apple repair shop is out of the question, specially seeing as people who have had the same issue, said the apple techs said the whole motherboard would need to be replaced at like a cost of 700$ I just want to know why a USB hub would even mess stuff up.

Before we get our hands dirty, here’s a word of warning. If you’re wondering how to reboot a MacBook Pro, bear in mind it’s the last resort when all other had failed. Don’t try it too often as it may harm your system.

No question, your Mac can handle rapid power losses and your hardware most likely won’t be hurt. What’s at risk though, is your data because each time you force reboot a Mac it affects the consistency of the file system. Now that you’ve been warned, let’s go.

Symptoms your frozen Mac needs a force restart. Applications are not responding. Pointer is not responsive. Loud fan noise. The screen goes black. Mac unable to restart Can you move the cursor? If yes, try this Before you force restart a Mac, it’s always recommended to first try a software solution.

Go to the Apple menu Choose Restart Click Restart in the menu that appears Two ways to force restart a Mac The simplest method: hold down the Power button till your Mac shuts down. Press the button again to restart it. If your Mac hangs for good and the pointer is inactive: Hold down Control + Command while pressing the Power button.

This is an alternative key combination to force restart a Mac. By the way, if you are on an iMac, the Power button is found on the back of your Mac. Is Shut Down any different from Restart? The difference between Shut Down and Restart is quite self-explanatory. When you perform a restart, your Mac will turn on again loading its previously active apps. As for shut down, your Mac won’t start until you press the Power button again. Interestingly, all new Macs have an automatic reboot feature built-in.

So even if you sit and do nothing, your frozen Mac would eventually reboot by itself, though it takes a bit of patience. How to force shut down a frozen Mac If you need to force shut down a MacBook Pro or MacBook Air, all you need is again to press a Power button on your Mac’s keyboard. Press and hold Power button for 2 seconds Choose Restart, Sleep or Shut Down in the menu that appears If you don’t want to reload the baggage of your previously opened apps, tick off “Reopen windows when logging back in”. We do recommend you to deselect this option when your Mac is slow in order to lighten the weight on your RAM. If your Mac won’t shut down: Press and hold Power button for about 6 seconds Hold the button until the Mac shuts down. Needless to say that when you force restart a Mac all your unsaved projects may be lost.

It’s unfair, we know. Why does my Mac keep freezing? The obvious explanation is your Mac lacks memory. Or to put another way, there are too many active processes running on your Mac. First off, go to Activity Monitor to check your memory usage.

E-book Manual Restart For Mac Free

Go to Applications Utilities Activity Monitor Click the Memory tab Now, look into how heavily your Memory is loaded. Quit apps that eat up too much memory for no reason. While this may work as a temporary solution, it doesn’t stop your Mac from freezing up again. You can either force reboot your Mac each time or opt for a radical solution. Below are a few more ideas you can try. More ways to fix a frozen Mac Restart your Mac in the Diagnostics mode Shut down your Mac and reboot while pressing D key. Within the menu that appears, launch the Apple Diagnostics tool.

This will check your Mac’s drive for errors. From then, follow the prompts to finish the diagnostics. Clean up your Mac Remove old unused apps, system junk, and pervasive browser extensions. For this purpose, try running application on your Mac. It’s quite effective in removing all junk from your Mac and has a number of helpful utilities, like RAM free up or app uninstaller. Reinstall your macOS This is the most radical of all methods, that’s why it’s so effective.

Check out for macOS High Sierra How to Hope this guide has helped you. Before you force shut down this article, feel free to share it, using the social buttons below. These might also interest you:.