If it does, reconnect each item, one at a time, until you find the one that’s malfunctioning. IMAC 27 LATE 2013 BLACK SCREEN UNTIL AFTER SEVERAL RESTARTS MACDisconnect those devices and see if your Mac goes to sleep. Indexing can take several hours, depending on the number of files on your Mac.Ĭonnected storage and devices: Malfunctioning USB and Thunderbolt storage and devices may keep your Mac from going to sleep. Spotlight indexing: If Spotlight is indexing your hard disk, your Mac won’t go to sleep. For example, Music accesses your disk to read the songs it plays, and DVD Player accesses the optical disc drive to play movies. If your Mac wakes when you’re not present, something may be pressing the trackpad or mouse button, or keyboard keys.Īpps: Apps that access a disk can keep your Mac from going to sleep. Unexpected keyboard presses or mouse and trackpad clicks: Key presses and mouse or trackpad clicks can wake your Mac. One other concern is there does not seem to be any indication of trim support for the external USB SSD. Anyway, the problem was definitely caused by the VirtualBox application.
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