If you power your Mac from a UPS with a USB connection, sleep may not be all it’s supposed to be.
power management
Can your Mac control sleep of its display, disks and system independently of one another? Many can’t.
Trying to get a more coherent overview of the different paths to concurrent, asynchronous, and background task management in macOS. Draft for discussion.
This update changes the file used to store the settings from Energy Saver. Careful if you have unusual settings or a UPS.
A command line tool with extensive abilities. It is not actually that hard to use.
Despite being set to stay awake, the other morning my iMac had decided to go to sleep. Why? Is there a ghost in the machine?
After a ‘Sleep Wake Failure’ and a bizarre ‘GPU Reset’, I’m not convinced that 10.11.4 is doing this iMac much good.
On some iMacs at least, the settings in Energy Saver are partly ignored. This must be a bug.
The Eclectic Light Company 