Try each of these steps in this order before you reset the SMC. The illumination around the I/O ports on a Mac Pro (Late 2013) doesn’t turn on when you move the computer.A Mac that supports target display mode doesn’t switch into or out of target display mode as expected, or it switches into or out of target display mode at unexpected times.Your Mac performs unusually slowly, even though its CPU isn’t under an abnormally heavy load.The MagSafe power adapter LED, if present, doesn’t indicate the correct charging activity.Your MacBook or MacBook Pro doesn’t recognise external devices that are connected to its built-in USB-C port.Your MacBook or MacBook Pro doesn’t charge through its built-in USB-C port.The display backlight doesn’t respond correctly to ambient light changes.Your Mac sleeps or shuts down unexpectedly and you can’t turn it back on.Your Mac notebook doesn’t respond properly when you close or open the lid.
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May 2023
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