I mean the CPU, Motherboard, Graphics Card and especially take precaution on the Wi-Fi and the Bluetooth because not all Wi-Fi or Bluetooth cards or adapters are Mac OS compatible. For installing macOS High Sierra on Hackintosh on Intel Pentium CPU, make sure that your hardware is Mac OS X compatible.Go to the Utilites menu and select Terminal When the machine boots eventually you will see the macOS or OS X Utilities screen. Reboot into the Recovery Drive by choosing the ‘Apple‘ menu > Restart, hold down the ‘command’ + ‘r’ keys on the keyboard during the start up process, when you see the start up screen you can let go.A properly built and configured modern PC shouldn't exhibit random shutdowns when under load. Read more in the man page: man cpulimit Another approach could be underclocking your CPU, to make it run slower, so it's more reliable. The -l switch is used to define the CPU usage limit in %. The -e is used to define the executed process name.