Wake up mac sleep mode

Additionally, faults in the devices such as a broken key on a keyboard that is constantly sending information to the computer will prevent it from going to sleep for very long. To troubleshoot these devices, try setting your system to sleep after a short period of inactivity 1 minute is the minimum in the Energy Saver system preferences, and then unplug all of them from your system including the keyboard and mouse.

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After doing this, wait for the system to sleep and see if it wakes up on its own. If not, then try plugging the peripherals back in one at a time starting with the keyboard and mouse , and see if the same behavior occurs. If you are able to pinpoint a specific device, then you can further investigate its settings or options that could be causing the problem. IR services Check this option to disable the infrared sensor.

Tackling Macs that randomly wake from sleep - CNET

Alternatively, with the option enabled click the Pair button and ensure that the system is paired to only one remote-control device. Screenshot by Topher Kessler Modern Mac systems do not include an infra-red sensor, but for a while Apple included these for controlling Front Row and other applications using the included remote control.

If the system senses infra-red activity, it may wake from sleep, so if you do not use the remote control, you might benefit from disabling the infrared sensor in the Security system preferences. If you do use the remote, then it may be helpful to ensure that it is paired with the system.

By default your Mac will not be paired with a specific remote, which allows it to be controlled by any remote device.

If you pair it with your remote, then it will only respond to your specified remote and ignore other infrared activity. Disable wake on network access The wake on network access options can be disabled in the Energy Saver preferences. Screenshot by Topher Kessler Apple has made extensive use of the common Wake on LAN WOL feature in network interfaces that can start up a system remotely using a special network packet called a "magic packet.

This feature is used by Apple for a number of its sharing services, including Bonjour-enabled service like iTunes sharing, Printer and File sharing, and even for Internet-based access such as Back to My Mac. Apple uses the service with its Airport Base Station or Time Capsule devices, which act as a "Bonjour Sleep Proxy" that registers the device and allows it to be accessed when it is asleep.

What Happens When You Leave Macs Idle for a Longer Period of Time?

When you try networking with the device when it is sleeping, the proxy will issue the magic packet to wake it up and allow you to access it. Even if you do not have a sleep proxy on your network, the Mac may still be woken if a magic packet is sent to it, and it will also periodically wake briefly in an attempt to register with a sleep proxy. This behavior is historically enabled on Ethernet devices, but on newer Macs you can use the Airport connection for this option as well.

If you need to do this, you had better make sure your Mac is running in your home network and nobody could use your Mac without permission except you.

How to fix black screen after awaking from sleep problem on Mac?

Otherwise, your Mac will face a security problem. Step 3: Click the lock at the left-bottom side to remove with administrator password.


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Before changing settings on System Preferences, it is necessary to state you have administrative privileges. So, if you decided to change the mode, just enter the following command:. Remember to be careful while changing because the incorrect action may cause a serious problem that would lead to battery exchange or reinstallation of the OS X. We use cookies along with other tools to give you the best possible experience while on this website.

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Resolving a Black Screen on Mac When Waking from Sleep

Learn more. To put your Mac to sleep , you can choose one of the following actions: Open the Apple menu and choose the Sleep option. Click Sleep after pressing the power key.


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If you have a portable Mac, just close the lid. No matter if it is a desktop or a laptop, there are the following processes: The processor goes into a low-power mode. Apple-supplied hard disks spin down.

We've heard reports of Macs falling asleep and having trouble waking up after an install of Lion.

Third-party hard disks may also spin down. Expansion card slots are deactivated. The built-in modem, if present, is deactivated. AirPort functions are off.

mac not waking after sleep.

The optical media drive, if present, spins down. Audio input and output are off. Keyboard illumination, if present, is off.