Go to the Launchpad and enter "Activity Monitor" in the search box. Click on the "Activity Monitor" icon.

Many users who have switched from Windows computers to Mac often wonder how to access Task Manager on Mac. The equivalent of Task Manager in Mac OS is called the Activity Monitor. It lets you control system settings, view information about Mac apps or processes, and even manage apps easily. Let’s find out how to open and use Activity Monitor.
To open the Task Manager on Windows, all you need is just right-click on the taskbar. When it comes to how to start Task Manager on Mac, the process is different. Below you will find several variants:
Go to the Launchpad and enter "Activity Monitor" in the search box. Click on the "Activity Monitor" icon.
Use the Spotlight search. Just press the Command + Space key combination, type "Activity Monitor" in a search engine and press "Enter" to open the application. Instead of using a keyboard shortcut, you can also click the magnifying glass in the upper right corner of the screen to display the search engine.
Navigate "Applications" and select the "Utilities" folder. Here find the "Activity Monitor" and double-click it.
Like many other applications installed on Mac, there are several ways to open Activity Monitor and it is all up to you: to choose the only one (the most convenient to you at any time) or use several of them according to your wishes.
Activity Monitor is not the exact copy of the Windows analog and it lacks some features. That is why if you want to monitor the running processes a little more closely and get real-time updates on your Mac's performance we can recommend you an excellent Mac Task Manager alternative – Commander One.
The app allows viewing and managing all the running processes on your Mac computer and if it is required to kill the process simply by pressing the Del button. Among the advantages of this app is the alphabetic order of all running processes with detailed information about them (the process name, PID, used memory, the date and the time of launch, etc.), the ability to kill even the system processes.
Besides that, Commander One is a powerful file manager that helps you to have well-organized documentation on your Mac with a huge variety of handy features (Terminal emulator, cloud storage integration, mounting and managing iOS, Android, and other devices supporting MPT protocol, root access, archiver, etc.).
If you have used computers running Windows, then you know that the Ctrl+Alt+Delete is used for terminating unresponsive programs. There is a similar keyboard shortcut on the Mac as well.
Activity Monitor lets you view detailed information about the processes running on your Mac and how they affect CPU, memory, energy, disk, and network. What’s more, you can monitor the status of your system right in the Dock.
The Activity Monitor is divided into several categories: CPU, Memory, Energy, Disk, Network, and Cache. They are the main indicators of system monitoring and also provide valuable information for troubleshooting. Each pane shows real-time statistics and resource usage graphs.
By default, Activity Monitor opens in the CPU tab that shows how each process uses the CPU on your computer. These statistics will help you determine which processes are affecting your Mac's performance, battery life, temperature, and fan activity. At the bottom, you will find the following information:
Please note that when you open the Activity Monitor, the CPU usage for the kernel_task process is quite high. Also, the fan may work harder than usual. In simple terms, kernel_task regulates the load on the central processor, preventing the system from overheating.
In the Memory pane of the Mac Activity Monitor, you can find out how much RAW your Mac is using, find a real-time memory graph with values. These stats will help you diagnose performance, and check the used memory, wired memory, application memory, etc.
The Energy tab shows the total energy use, as well as provides information on how much energy each app consumes. Let’s check each parameter of the Energy pane.
The Disk panel shows the amount of data each process has written to and read from your disk. It represents the number of times your Mac has accessed the disk to read and write data.
The Network tab displays the data your Mac is sending or receiving over the network. You can also quickly identify the applications that are transferring data and external resources for each process in the Task Manager. The information at the bottom of the Network pane shows the overall network activity of all applications.
If your MacBook is running macOS High Sierra 10.13.4 or later and the content caching is enabled, you’ll also see an additional pane - Cache. Here you will find information such as the amount of cached content uploaded, downloaded, or dropped over time by local network devices.
It is very important to know how to use the MacBook Task Manager. Activity Manager not only stops slow or unresponsive processes but also contains useful data and statistics to help you check and improve your Mac's performance.