This process should work on any Mac model. Likewise, if your fans can’t keep your computer cool and it shuts off due to heat, you may need a fan replacement. If the processor fails to keep a steady 100% load during the test, you could have a faulty processor.

It’s a quick and simple test that will bring your Mac’s CPU usage up to 100% so that your CPUs will show whether or not they can handle the load, and your cooling fans will show whether or not they can keep the CPU cool enough. This will give you an idea of whether or not your hardware is heading out the door or not. If you suspect that your Mac’s CPU or cooling fans might be failing, putting it through a quick stress test to see whether or not your hardware is performing as expected may not be a bad idea. In this tutorial, we’ll show you how to stress test your Mac using Terminal so you can ensure all your processor’s cores are working up to snuff and your cooling fans aren’t grinding or failing to cool your Mac as they should.

As rare as it may be, your processor or CPU cooling fans can fail, and there is a really easy way to test your Mac’s hardware with the Terminal app that comes with macOS to ensure everything is working right.

Mac view cpu usage