Miya Pearson
If your iMac is in sleep mode, there are several ways to wake it up. You can try pressing any key on your keyboard, moving your mouse, or opening your device's lid. If these methods don't work, you can try pressing the power button briefly to reboot your iMac. It's important to note that if you manually put your iMac to sleep by pressing the power button, you may need to use the power button to wake it up. Additionally, you can set your iMac's sleep and wake settings, such as the duration of inactivity before it goes to sleep or allowing it to wake up for network access.
How to wake an iMac from sleep
| Characteristics | Values |
|---|---|
| Manual sleep mode | Press the power button |
| Automatic sleep mode | Move the mouse, press any key on the keyboard, open the device lid, or press the power button |
| Bluetooth keyboard | "Allow Bluetooth devices to wake this computer from sleep" in System Preferences |
| Wired keyboard | No known issues |
| USB devices | Can cause the Mac to wake |
| Apple Watch | Unlock your Mac and approve requests |
| Prevent automatic sleeping | Turn on "Prevent automatic sleeping on power adapter when the display is off" |
| Hard disks | Turn on "Put hard disks to sleep when possible" |
| Update system | Click the pop-up menu next to "Enable Power Nap" and choose an option |
| Network access | Click the pop-up menu next to "Wake for network access" and choose an option |
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What You'll Learn
Waking an iMac with the power button
If your iMac has been left alone and has gone to sleep automatically, you can wake it up by hitting a key or two or by moving the mouse. However, if you manually put your iMac to sleep, you will need to press the power button to wake it up.
To put your iMac to sleep manually, you can use the Apple inbuilt shortcut, Cmd+Alt+Eject. Alternatively, you can hold down the power button for a little longer than a press, but not long enough to "kill the power". You can also use a keyboard shortcut, such as Option+Command+Power Button, or set up a hot corner for sleep.
If you want to be able to wake your iMac with the display power button, you can change the settings in the Display panel. Go to System Preferences -> Display -> Options and select "Pressing the display's power button puts the computer to sleep or wakes it". You can also enable "Allow power button to put the computer to sleep" in the Energy Saver settings.
It's worth noting that some users have reported issues with waking their iMacs from sleep mode, and in some cases, it may be necessary to reset the SMC or PRAM, disconnect peripherals, or change keyboard settings.
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Using a keyboard to wake an iMac
If you're using a wired keyboard, you may need to modify your iMac's sleep settings with third-party software or terminal commands. If you're using a Bluetooth keyboard, you must first allow it in System Preferences to wake the iMac ("allow Bluetooth devices to wake this computer from sleep").
If your iMac is not waking from sleep when tapping the keys/space bar on the keyboard, it may be due to a recent macOS update. In this case, you can try adjusting your sleep settings. To do this, go to the Apple menu > System Settings, then click Lock Screen in the sidebar.
If you have a wired keyboard, another solution is to download third-party software such as Karabinier Elements to disable the built-in keyboard when an external one is connected.
Additionally, if your keyboard and trackpad batteries are almost dead, this could be the reason why your iMac is not waking up.
Finally, if you have a MacBook, simply pressing a key or two should wake it up from sleep.
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Waking an iMac by opening the lid
If your iMac goes to sleep automatically after a period of inactivity, it can be woken up by interacting with the keyboard or mouse. However, if you manually put your iMac to sleep, you will need to press the power button to wake it up.
To wake an iMac by opening the lid, you must first ensure that your iMac is set up to wake from sleep in this way. You can do this by adjusting your sleep and wake settings. To do so, follow these steps:
- Click the pop-up menu next to "Turn display off on battery when inactive" and choose an option.
- Click the pop-up menu next to "Turn display off on power adapter when inactive" and choose an option.
- To stop automatic sleeping when the display is off, turn on "Prevent automatic sleeping on power adapter when the display is off."
- To allow your iMac to wake briefly so users can access shared services, click the pop-up menu next to "Wake for network access" and choose an option.
Additionally, you can set your iMac to wake up at a specific time. To do this, open Terminal and enter one of the following pmset commands: pmset -g sched (to see the current schedule) or sudo pmset repeat wake M 8:00:00 (to schedule your iMac to wake up at 8:00 a.m.).
Note that some methods of waking your iMac may not be available depending on your specific model.
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Troubleshooting a non-responsive iMac
If your iMac is non-responsive, there are several troubleshooting steps you can take to try and resolve the issue. Here are some detailed instructions to guide you through the process:
Identify the Issue:
Firstly, it's important to identify the specific problem you're facing. Is your iMac not waking up from sleep mode, or is it completely unresponsive? If it's the former, you might want to check your sleep settings and try different methods to wake it up, such as pressing the power button, hitting any key, or moving the mouse.
Restart Your iMac:
If your iMac is frozen or non-responsive, a simple restart might be the solution. You can do this by holding down the power button for a few seconds until the Mac restarts and you see the Apple logo.
Check Your Hardware:
If restarting doesn't work, the issue could be related to your hardware. Check if the screen is black, indicating a problem with the display. Ensure that the monitor is connected to a power source and switched on. Verify that the HDMI or DisplayPort cable is securely connected. Try switching the monitor off and on again, and if that doesn't work, reboot your iMac while the monitor is switched off, and then turn the monitor back on during the boot process.
Manage Resources:
Sometimes, an unresponsive iMac can be due to a lack of disk space or memory. Open the Menu App by clicking on the iMac icon in the Menu bar, and under Memory, click "Free Up" to free up some memory. You can also check the CPU tab to see the top consumers and quit any applications you don't need to reduce the CPU load.
Update Your Operating System:
If your iMac is running an older version of macOS, updating to the latest OS may help resolve any compatibility or software issues.
Check Your Hard Drive:
If the above steps don't work, the issue could be related to your hard drive. If you have a backup of your system, you can try booting from an external hard drive to see if you can log in and run Disk Utility to test your internal drive. If your hard drive is indeed failing, you may need to install a new one.
Remember to always ensure your iMac is up to date and properly maintained to avoid future issues.
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Using an Apple Watch to unlock an iMac
If you have a Mac that was released in mid-2013 or later, with macOS 10.13 or later, you can use your Apple Watch to unlock it when it wakes from sleep. To do this, first, ensure that your Apple Watch is on your wrist, unlocked, and close to your Mac. Your Mac should also be awake. Then, follow these steps:
- Check that your Mac and Apple Watch are signed in to iCloud with the same Apple Account.
- Ensure that your Mac has Wi-Fi and Bluetooth turned on.
- Set up two-factor authentication for your Apple Account and create a passcode for your Apple Watch.
- Go to System Preferences on your Mac and click on Security & Privacy.
- Select "Use your Apple Watch to unlock apps and your Mac" or "Allow your Apple Watch to unlock your Mac".
- The first time you log in after turning on this feature, you must enter your Mac password manually. After that, your Apple Watch will log in for you automatically.
You can also use your Apple Watch to approve other requests for your administrator password. When your Mac asks you to approve with your Apple Watch or enter your password, simply double-click the side button on your Apple Watch. Your password will be automatically entered without the need for typing it.
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Frequently asked questions
There are several ways to wake an iMac from sleep mode. You can try pressing any key on your keyboard, moving your mouse, tapping the trackpad, or opening the device's lid. If these methods don't work, you can try pressing the power button briefly to reboot your iMac.
There could be several reasons why your iMac won't wake up from sleep mode. It could be due to unwanted software, malware, or malicious software in the background. Additionally, external devices connected to your iMac can sometimes cause conflicts and be the root cause of sleep mode issues.
To prevent your iMac from waking up from sleep unexpectedly, you can disable the built-in keyboard when an external keyboard is connected. You can also try to identify and remove any external devices that might be interfering with your iMac's normal operations.
You can set your iMac's sleep and wake settings by going to the Apple menu and selecting "System Preferences." From there, you can specify when your iMac goes to sleep and wakes up, such as after a certain duration of inactivity or when waking for network access.
