Ever let your card on the Mac screen saver? Sometimes this can happen, and when the Mac can not be used, because the screen saver is completely stuck.
https://www.macdown.com
This problem is most obvious symptoms like sound the same; the screen saver is enabled and active, but can not respond to any Mac, you can not let Mac prompt screen saver unlock or wake up. Sometimes the screen saver may become stuck, but it will not move or activity. In either case, the following troubleshooting steps should help to resolve the issue jammed the screen saver on your Mac.
If the screen saver is stuck on the Mac, but is active (you can move the mouse)
If the screen saver is stuck but it was still moving and active, and you can continue to move the cursor and Mac keyboard response volume up / down and adjust the brightness, you can usually make Mac goes to sleep to solve the problem or try to start the lock screen.
On a Mac laptop, simply close the MacBook Pro, MacBook Air or MacBook lid, you can easily have your Mac go to sleep. Wait a minute, then open the lid again Mac laptop, Mac will wake up from sleep. This should prompt regularly log in or wake-up process, Mac will be available again.
On the iMac, Mac mini and Mac Pro and other Mac desktop, you can try to use the lock screen keyboard shortcuts (Control + Command + Q) or Log Out Shortcut (Command + Shift + Q), but both methods are not always you may have to shut down Mac effective and reopen. In the absence of the lid can close the Mac, so to solve in this case the program is to restart the Mac, we will discuss below.
If Mac screen saver on the card and there is no response (the mouse cursor does not move, the keyboard does not respond)
If there is no movement of the mouse cursor, and the screen brightness / dimming sound / down button on the keyboard does not work, the Mac may have been frozen, to be forced to restart.
On most Mac, you can force to restart by holding down the power button until the Mac off and then wait a few moments and then press the power button again to turn Mac again.
重要的是要注意屏幕保护程序是移动的可视图像，移动文本或屏幕上可见的其他移动元素，而不仅仅是空白屏幕。因此，这是一个不同的问题，从Mac开始卡入黑屏或Mac从睡眠状态唤醒到黑屏时，两者都不是特定于屏幕保护程序的问题。