CPU usage is too high with Yosemite and an external monitor, kernel_task spikes to 600%+
After reading number of blog and days of internet search, the solution worked for me. The kernel will keep looping some very simple tasks, e.g. getting the date, therefore ‘consuming’ (with the highest priority) the majority of the CPU in a bid to cool the system down. The solution mentions on other blog about removing ACPI_SMC_PlatformPlugin.kext, […]