How to wake up your mac from sleep mode

The same should be true of AirPort-based wireless access. Third-party Ethernet cards and wireless solutions, however, may remain active during sleep.

As mentioned in the Security Concerns section above, your Mac is as safe when asleep as it is when awake. It can even be slightly safer since network access is usually disabled during sleep. Safe sleep is much safer than normal sleep because all RAM contents are first written to the hard drive. Should power fail during sleep, your Mac will recreate the state it was in when it first entered sleep.

You can see this occurring when you first recover from a power failure during a safe sleep session. A progress bar will display, as the contents of RAM are recreated from the hard drive data.

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Yes, it is, and it's fairly easy to do with a few terminal commands. Share Pin Email. Tom Nelson has written hundreds of articles, tutorials, and reviews for Other World Computing and About. He is the president of Coyote Moon, Inc. Updated February 07, The Mac's RAM is left powered on while it's sleeping. This allows the Mac to wake up very quickly because there's no need to load anything from the hard drive. This is the default sleep mode for desktop Macs. This mode is also called hibernatemode 0. In this mode, the contents of RAM are copied to your startup drive before the Mac enters sleep.

Once the Mac is sleeping, power is removed from the RAM. The sleep and wake behavior of your Mac is affected by its settings and activity from your apps, network, and connected devices. Some of these controls might not be available on your Mac. If it doesn't seem to wake at all, check for these possibilities:. If you still see the issue, contact Apple Support. If your Mac doesn't sleep or wake when expected The sleep and wake behavior of your Mac is affected by its settings and activity from your apps, network, and connected devices.

If your Mac doesn't go to sleep when you expect

Schedule button Make sure that you aren't putting your Mac to sleep accidentally: Moving your mouse pointer to a hot corner can put your Mac to sleep, depending on your Mission Control settings. The same network activities that can wake your Mac can also keep your Mac from sleeping. Any app or other process that's running on your Mac could also be keeping your Mac awake. If "Yes" appears in the Preventing Sleep column for an app, your Mac won't automatically sleep while the app is running.

Other apps prevent sleep only when doing certain things, such playing music or video, printing, or downloading files. 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. That causes their previous maybe defective settings to be overwritten.

I tried holding down Command and R at start-up which took me to Utilities window. This happened to my sister in law.

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I pulled the bottom cover, disconnected the battery for 15 sec. Then I reset the SMC. Her macbook was back to life. Install a VNC client on your mobile device. Log into your Mac. The screen usually comes back.

It checks the file system, mounts the drive, removes a preference file, removes an upgrade cache file, then reboots. 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. 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.

Plus every port has something connected to it and that can cause the problem too. What a cable nightmare. 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.

Fixing a Black Screen on Wake from Sleep on Mac

Thanks again. I have a MBP and occasionally have this issue and have tried all of the usual suspects. Yet it still seems to be intermittent. 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.. The simplest way I have found on my late iMac iCore5 running the latest MacOS software is to just type in the password.

I really need some help, out of warranty and money too! Unscrewing the back and removing the battery 2. SSH this is beyond me. VNC is also beyond me. I tried the following and only got a black screen in response: Turning on and off 3. Waiting patiently Anything else, anybody might suggest? I tried a lot of things to wake mine up, but realized that typing in the password was so obvious, I was overlooking it.

After any period of inactivity, the length of which you can set, a password is required to reactivate a Mac. I had this problem today on my iMac 27 I7. Suddenly started blacking out the screen on a regular basis. I first reset the power save options to default just in case one was corrupted and causing issues making the computer go to sleep on a very short timescale. No joy. I rebooted, turned off and restarted, etc.

I also noticed that my NAS drive was regularly saying that folders were not available in Lightroom. I thought it was overheating, so turned it off. Same problem within a couple of minutes. LR kept telling me the folder on the NAS was not available and the screen would regularly go black, every few minutes. If I got 5 mins use before the black screen, I was doing well!

Then I had to repeatedly press the power button to wake it up again. I then started looking at other things running. Things that automatically started at login. I quit MacUpdate Desktop and hey presto, problem solved. That starts up from a NetBoot server using the default boot image. Would be interested if it helped any of you. Good luck! I also tried to unplug the battery and check the display cable, and still no results. I finally reinstalled MacOS by connecting the macbook to an external monitor , but still nothing…. But as I said, the guy from Apple found the solution for my macbook: He finally reconnected the display and that was it!

To find how to disconnect the display cable on the Macbook, go to this website at step It is in french but pictures are pretty clear… https: Am I the only one who thinks these guides are useless? None of the options have helped at all, and all these guides never work in my long history of mac computers.

Waking up your MacBook from sleep

My son cracked the screen on his macbook Pro, and I ordered a new top half and had the black screen issue and was nearing the point of giving up when I tried your solution. Press once makes second screen go black, press again they both come come back on. Hope it helps someone. This time it did not- I turned over computer to contemplated taking screws off….. Thanks to people like you for free advice, as I have no money to fix this expensive computer I bought to help me work. As other have posted my problem started after updating the OS on my Mac Pro.

I am continually impressed with the technical brilliance and willingness to help others demonstrated by the Mac Community. I dread driving into the city to go to the genius bar. Do any of you geniuses have anything else to try? I walked away from the computer with the power plugged in after talking to apple Care associates where I tried with no apparent success: SMC System Management Control unplug, replug, turn off, hold shift-control-option for ten seconds, power on Nothing appeared to work, but, like I said, I walked away from my computer with the power plug in and the power on and when I came back an hour later the screen with my name and guest was on.

It worked for a while, I should have reinstalled MacOS. None of the methods helped except Coolidge one. I just tried evrything this article said. Nothing was working. I was down to reinstalling mac OS but I couldnt even see the recovery screen. I logged in safe mode presing shift after the Apple sound, thatwas the only way the progress bar wouldnt get stuck and I was now on the account log in screen where you select the user and enter the Password, except my monitor was acting as a second display, conecting a mouse and closing the laptop solved the problem.

Once in recoverymode I tried the CleanMyMac solution above and uninstalling some unnecessary software but every time I restarted, my display would still be black with some backlit but nothing would appear, I could only interact with it through my secondary monitor.

If your Mac doesn't sleep or wake when expected

Well I was about to use my secondary monitor workaround to enter recovery mode and clean install high Sierra but before that I did one last thing… I forced shut down the computer and I know it sounds stupid I just banged my MBP, just a little, a hard slap here and there and a forceful shake, turned it on again and there it was, the Apple logo appeared, the progress bar said that the update had 15 minutes left to complete; I waited and that was it, I am here writing my experience. I tried everything on the list and in this article.

The only thing that worked was the suggestion by Coolidge run a string of commands. Just wanted to comment and say thanks! And also give frustrated Mac owners hope that your dim screen will brighten once again!

Why Doesn’t My Mac Wake From Sleep? [Ask MacRx]

Step 3 worked perfectly. Immediately backed up all important files after this. Julian, Thank You!