If it does not turn off, unplug the power cable that is connected to the back of the computer from the outlet. Dustin Lamb contributes to various online publications, specializing in computers and technology. Lamb has a bachelor's degree in computer information systems from Cleary University and also works as a technology consultant.
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Video of the Day. How to View Blocked Contacts on Yahoo! Share on Facebook. Step 1 Press "Command," then "Escape" and "Option" at the same time on the keyboard.
Running First Aid Disk Utility
Step 2 Click the name of the application that has frozen from the list. Step 3 Press and hold the power button on the computer or keyboard until the computer turns off. Step 4 Plug the power cable back into the computer. Press the power button to restart it. Tip Apple Geniuses are available at Apple stores to assist you if your computer is not working after taking these steps. After a forced shutdown to get it back, the fans howl for a bit on a restart, and I have had a kernel panic as a result of the heat. My stupid guess.. Thanks again. Plus every port has something connected to it and that can cause the problem too.
What a cable nightmare.
How to fix your Mac not waking from sleep
I never put my Mac Pros to sleep. I bump up the speed of all the fans when I step away and shut down most nights other nights are for maintenance. My iMac was doing this from both wake and start up and there is another solution under Fixing Black screen on iMac start up. I tried everything else but only this one worked. This usually happens if a software update is installed while the mac is sleeping, usually I just hard restart the computer and it proceeds to finish installing the update which usually takes min. It is a bit annoying though.
It checks the file system, mounts the drive, removes a preference file, removes an upgrade cache file, then reboots. Install a VNC client on your mobile device. Log into your Mac. The screen usually comes back. This happened to my sister in law. I pulled the bottom cover, disconnected the battery for 15 sec. Then I reset the SMC. Her macbook was back to life.
I tried holding down Command and R at start-up which took me to Utilities window. That causes their previous maybe defective settings to be overwritten. I also agree with Ted. I got mine in I used some windows and quite a bit linux before that.
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I gave up windows completely now and use linux almost exclusively. Not only it is free. It is most robust. I need to dig up something back from my mac today after a year not using it.
Just found that I spent a whole morning just to get it out of this black screen. It is ridiculous. I tried resetting the pram, using the stated procedure. It immediately booted normally….
No idea what I did wrong. MacBooks not up to snuff in ? The last time I saw a non-Apple laptop on TV, it was a boxy black thing, with a floppy disc slot on the side. Doug, simplest solution is to leave it open all the time. Hi John, I just want to know how long have you been leaving your Mac on?
I am trying to fix the problem by letting it on for a while now, however, I always worry that I am over stressing my mac. I find that if I wait anything from 5 — 20 seconds it comes on automatically. Maybe some are too impatient? I also noted a few times that when it came on that my Mac was doing an automatic backup, and so maybe that is one of the causes. This started happening to me when I switched from using an Nvidia-based vpu MacBook to an Intel-based vpu Macbook Air sometime around Please visit the AppleSeed home page for more information on the seed program and joining seeding projects.
How did you know? I had a black screen, for the first time ever, this morning when I woke my MacBook Pro. It was before reading this article! A forced reboot resolved it.
No idea what caused it. I have been experiencing lockups that require SMC resets.
Computer Freezes Up After Powering Back Up From Sleep Mode
I took my Air to the Apple store today. I suspect that you, and not he, are correct. I too have experienced this before throughout the years with MacBook Pro, often just closing the lid and waiting about 30 seconds or a minute then opening it again fixes it for me. I think what that does is force the Mac into a sleep state to create a new sleep image, then wakes it up again, and all is usually well. Like you, I seem to encounter this after or soon after updating system software. Name required. Mail will not be published required. All Rights Reserved. Reproduction without explicit permission is prohibited.
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iMac freezes after sleep, crashes during sleep mode | MacRumors Forums
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