You can also use this as a simple trick to keep your Mac from sleeping when it is sitting idle. If you’re downloading a file that will take a few hours to complete, it’s a good idea to close the lid while keeping it awake so that the download can take place seamlessly. The second use-case for keeping your Mac awake with the lid closed is for when you’re downloading large files. It can also drain the battery rather quickly. Keeping the MacBook’s lid open at all times in such a scenario can be distracting as you will have two screens to look at. One of the most popular use cases for keeping the Mac awake even with the lid closed is when it’s connected to an external monitor. Why Should You Prevent Your Mac from Sleeping If this is an issue you face regularly, fret not because there’s a simple fix! Here’s how you can prevent your MacBook from sleeping when you close the lid. So you have to keep the lid open or connect your Mac to a charger all the time. Sometimes just rebooting the Mac will be sufficient to remedy the issue completely, this is often the case if you encounter the black screen on wake after updating Mac system software.One of the flip sides of using a Mac with an external monitor is that it goes to sleep when you close the lid. Wait a few moments and then hold down the Power button on the Mac again until it boots back up again.Hold down the Power button on the Mac until the computer shuts down.You can force reboot with the following simple instructions: This will typically allow you to regain access to the computer, and it is usually sufficient to resolve the black screen on wake problem completely. The next step is to turn the Mac off, then turn it back on again. Simply turning the brightness up or turning the Mac on will resolve those type of issues quickly. Often the brightness is just turned down low or the computer is actually off and not in sleep mode. Check to make sure the Mac is plugged in to a power source (even a laptop, the battery could be drained).If the Mac is using an external display, make sure that display is powered on.
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