When I turn off my MacBook Air running High Sierra by selecting > Shut Down, then close the lid, the white Apple logo in the lid will come on and I hear the startup chime.
At first I thought that the Power button was pressed by something on the lid when I close it, but that isn't the case.
I've found only one Support page about this, but this doesn't seem to apply to me because I have no error messages.
As a consequence, I can never turn off the computer while the lid is closed – i.e. to travel or put it away – and the battery depletes much faster when I don't use it for a couple of days.
How do I stop this from happening?
Best Answer
I suspect deep system modifications from a third party app may be the culprit.
Download and run Etrecheck. It's a free diagnostic snapshot of your machine for troubleshooting purposes. All personal info is anonymized. Update your question with the output using a pastebin link - or the direct output depending on the verbosity.
Based on the link provided, uninstalling some of the more intrusive applications listed (and their respective kexts, launchagents, daemons) may be the solution to your issue. Try uninstalling one at a time until the problem goes away.