Display Power Issues on Linux Mint Cinnamon (iMac / Apple Computers)

grub_linux_identify_UEFI_not_running_macOS.txt

# resolve power management issues on intel mac computers running LINUX
#
# add the acpi_osi=!Darwin Kernel Parameter
#

# edit GRUB:
sudo nano /etc/default/grub

# find the line GRUB_CMDLINE_LINUX_DEFAULT and add 'acpi_osi=!Darwin', 'quiet' and 'spash' paraemters example follows : 
GRUB_CMDLINE_LINUX_DEFAULT="acpi_osi=!Darwin quiet splash"

# update grub
sudo update-grub

# reboot system
shutdown -h now

# press power button
cross fingers :)