How to reset mac pro

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You can change your privacy settings whenever you like. Here are your next steps: a. Instead, press Command-Q to shut down the Mac. When the new owner turns on the Mac, setup assistant will guide them through the setup process. No matter the model or condition, we can turn your device into something good for you and good for the planet.

Moving to a new Mac? Create a backup Be sure you have an up-to-date backup of your important files and data. Sign out of iTunes Open iTunes. When prompted, enter your Apple ID and password. Then click Deauthorize. Learn more No matter the model or condition, we can turn your device into something good for you and good for the planet. Thank you. 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.

I've never heard of that serial number issue; that's really weird! 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.

I think my MacBook has had it, if Apple can't help me I don't know how to find someone who can. Hello this happened to me before so i needed to restart my pram and it worked cntrl alt p r but it happenednagain and it doest work anymore Makesthe sounds correctly but The screen says black. 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 had the same issue with my old iMac but back then you reset your SMC by holding down your power button for 15 secs.

I've never heard of a USB hub doing anything like that. Have you found a solution to this issue yet? Sounds like something Apple might have to fix. I am going to see if doing a clean instal will work; waiting to have internet reinstalled in my apartment. There are reports of this happening with USB hubs. I had the same issue years ago with a iMac, back then the SMC could be reset by the power button. Not any more. It's your hub.

They will sometimes trigger your mouse Unplug it and you will not have the issue anymore. Thank you! She was suitably impressed! Before I wrote this article, I wasn't aware of it either.

What the SMC does

Turns out it's extremely useful! Hopefully this article has helped get the word out—I'm sure there are a lot of people who could benefit from knowing what it is and how to reset it. This error message pops up: "You are unable to log into the user account at this time I am having to reset the pram and the smc every single time I turn on my computer.

I can't put it to sleep of I have the do the pram reset. Whey is this happening? What can I do? You might want to bring your computer into an Apple store and have their techs look at it. That's not a problem I've come across before. Can you be more specific as to the steps for a machine like mine? I have a Macbook Pro retina. You say "On the built-in keyboard, press the Shift, Control, and Option keys on the left side and the power button, all at the same time. My issue is that I get a popup about icloud password every time i boot up. I recently switched to two step verification, and I think it's asking for an app specific password.

Power down the computer normally 2. Ensure power cord is plugged in 3. Does that sound like the physical steps you're using? If so, how can there be no confirmation that something is happening like with PRAM, at least it dings over and over again if you hold down all the buttons. Maybe I'm just doing it wrong. Yes, that should say "release all four keys at the same time. That's why "turn on the computer" is the next step.

So you're correct in thinking that there's no confirmation—I'm not sure why that's the case, but I've never had any sort of confirmation on my machine. What happens when you enter your iCloud password? If you look closely you will notice on the MagSafe power cord where the magnet plugs into the side of the computer the tiny LED light will change from Amber color to green and back to Amber that is the confirmation that the SMC was reset. The MagSafe light indicator, you mean? I would imagine that it is. Have you tried resetting the SMC on your computer? I literally cannot thank you enough.

You saved me so much time and money and Apple-related stress, this was the only thing that worked! I'm really glad to hear that it was helpful! This is a common fix that a lot more people should know about. That's a problem. Everywhere I've read the SMC advice, it says to remove the plug "for 15 seconds". I assume it means "at least" 15 seconds - or is the time critical? As far as I know, it's at least 15 seconds, and it doesn't have to be exact. As for turning your computer off at the wall. I'm not sure. If you want to reset the SMC, though, I'd use the procedure above.

You shouldn't need to reset it every night. That's a tough one. I'd head to an Apple store.

Make Your Mac Feel Like New Again With a Fresh Install of OS X

I'm not sure if there's much you can do about that! Hi, read through all of these posts and wondering if anyone can assist? I have a 15" Macbook Pro with Retina display that is just over a year old and it will not turn on. I'd bring that to the Apple store; if neither of these resets are helping, you might need some more serious work done. Let us know how it turns out!

Hi Jeff, did you manage to fix your mac? I have the same Macbook with the same problem and mine is only a year old as well this month. Please share any new information you might have. Hello, I have an MacBook pro that is randomly shutting down on me anytime that I try to run some hefty programs, and even sometime if I run more then one program. Sometime just starting her up make it shut down. I have trying to restart the SMC, but I am not sure if I did it correctly or that was just not the solution. Any suggestions? Have you tried resetting the PRAM as well? Also, means the computer's four or five years old, so you might be having some age-related problems; that's about how long mine last when I use them all the time.

I did the shift safe mode restart thing and it stayed loading for about 25 minutes, now I just tried restarting the pram but this is also taking a while to change, how long does it take until it boots up? I started having problems while plugging a USB in the computer and then it froze. Now I just have a grey screen with the apple logo and a loading dotted circle moving. It certainly shouldn't take 25 minutes to boot. Hopefully that'll get you back up and running!

How to Restart a Mac Computer

Hi,I have an 06 macbook, for a while the battery has been unrecognised and it shows the x symbol where it should be a thunderbolt Iv reset the smc with an initial change but then defaults back to the x symbol.. This evening I replaced the connection from the logic board to the battery and still no further forward after the resets I checked with a Mac repair shop and their is no fault with the battery I'm at a loss really, any ideas?

Thanks in advance, Dec. Though I have to say that you've been able to keep a Macbook running for 9 years! That's pretty impressive. After doing a little research, I haven't come up with a whole lot on this. Some people have seen the X symbol when they have a bad battery, but if the shop says that the battery's alright, and you also replaced the connection from the logic board, I'm not sure what else you can do. Call Apple, maybe?

They might be able to help out. I have to say I have exactly the same problem If I start again, same process I have tried the PRAM reset?

How to reset the System Management Controller (SMC) on your Mac

Macbook Air keyboard became completely unresponsive. Was able to shut it down but now it won't turn on. I tried the SMC reset but it still won't turn on. Power indicator turns green for about a second after the reset so it seems to be getting the message but it still won't power on. Have you tried a PRAM reset?


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If that doesn't work, I'd take it into an Apple store. That doesn't sound good. After a weekend of trying things I finally managed to login on the acct I use most. It was running slow, then shutdown on its own. Similar problems happened, couldnt boot to anything but single user mode, Target disk, or option boot.

Finally made it in after running the two commands suggested in safe mode. I logged in using a less used account and it ran normally. Ran Disk Utility to verify permissions, repair permissions, and verify HD. Permission found a bunch of things from the printer driver I recently installed. I'm afraid to shutdown. What should I do to troubleshoot the slow user acct while logged in normally? Man, I'm sorry to hear that—that sounds pretty rough. At this point, your best bet might be to take it to a Genius Bar.

Sounds like you could have a pretty big problem somewhere in there. Sorry I don't have any better advice. Let us know what you find out—this could be helpful to other people if you get it figured out! My computer is now in a continuous cycle. The der-di sound happens, the apple and status bar appears. After status bar fills in, blank grey screen, then the computer restarts. It has been doing this for about 15 minutes. I think it is not working correctly. What is supposed to happen?