How to open task manager on mac

The Mac Task Manager is a mini-version of the Activity Monitor. To open it, simultaneously press down the [CMD] + [ALT] + [ESC] keys on your keyboard. This will open a window containing a list of all currently opened programs and applications that are running in the background

 Note

The Alt key is also referred to as the Option key. In fact, on some keyboards it is actually labeled “Option”.

Mac Task Manager
List of programs in the Mac Task Manager

Mac Activity Monitor and CPU load

Like the Task Manager, the Mac Activity Monitor also lists all of the processes that are running on the system. You can open it by going into Applications and selecting Utilities, or searching for it directly in Spotlight by clicking on the magnifying glass in the upper-right corner of the menu bar.

The Mac Activity Monitor is split into several sections: CPU, Memory, Energy, Disk, Network, and (in later versions) Cache. The list of processes includes user apps, system apps used by the operating system, and invisible background processes. You can choose which columns to display and filter the processes by going into the “View” menu. As well as the Mac Activity Monitor, you can also install other programs such as htop to manage system processes.

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CPU pane

The “CPU” pane shows how different processes are affecting CPU performance. Alongside the stats in the “Energy” pane, this information can help you work out what processes are affecting the performance, battery runtime, temperature and fan activity of your Mac. Just below the main window, you will see an additional section containing the following information:

  • System: Percentage of CPU capability currently being used by system processes.
  • User: Percentage of CPU capability currently being used by apps or processes launched by the user.
  • Idle: Percentage of CPU capability not in use.
  • CPU Load: Percentage of CPU capability currently being used by all processes (System and User combined).
  • Threads: Total number of threads used across all processes.
  • Processes: Total number of processes that are currently running.

 Note

When you open the Activity Monitor, you might notice that the CPU load for the kernel_task process is rather high, and also that the fan is working harder than usual. One of the roles of kernel_task is to regulate the temperature of the CPU.

Memory pane

The Memory pane of the Mac Activity Monitor tells you how memory is currently being used. The section at the bottom shows the following statistics:

  • Memory Pressure: This is a graph that illustrates the availability of memory resources.
  • Physical Memory: Total amount of RAM installed.
  • Memory Used: Total amount of RAM currently in use.
  • App Memory: Total amount of memory currently being used by apps and their processes.
  • Wired Memory: Memory that cannot be compressed or paged out to the hard drive and that must therefore remain in RAM.
  • Compressed: Amount of RAM that is compressed to make space for other processes.
  • Swap Used: Space that the memory management system of the OS is using on your startup drive.
  • Cached Files: Memory that was recently used by apps but is now available to other apps.

Energy pane

The “Energy” pane provides information on overall energy use and tells you how much energy is being used by each app. As in the other views, you can click the column headings to sort the processes according to the values measured. The bottom pane shows the following:

  • Energy Impact: Total energy used by all apps.
  • Graphics Card: Type of graphics card installed.
  • Remaining Charge: Percentage of battery charge remaining.
  • Time Until Full: Amount of time the Mac must be plugged into the mains before it is fully charged.
  • Time on AC: Time elapsed since the Mac was plugged in.
  • Time Remaining: Estimated amount of time the Mac can keep running on battery.
  • Time on Battery: Time elapsed since the Mac was unplugged.
  • Battery (Last 12 hours): Battery charge level over the last 12 hours.
Mac Activity Monitor: Energy pane
Mac Activity Monitor showing list of programs sorted by Energy Impact

Disk pane

The “Disk” pane shows how much data each process has read from or written to your disk. It also shows “reads in” and “writes out” (IO), that is, the number of times your Mac accesses the disk to read and write data. The information at the bottom of the “Disk” pane shows the total disk activity for all processes combined.

Network pane

In the “Network” pane you can see how much data your Mac is sending and receiving over the network. This allows you to identify processes that are sending or receiving the largest amounts of data. The information at the bottom of the “Network” pane shows the total network activity for all apps combined.

Mac Activity Monitor: “Network” pane
Mac Activity Monitor showing list of programs sorted by number of Sent Bytes

Cache pane

In macOS High Sierra 10.13.4 or later, the Activity Monitor has an additional pane called “Cache” (if Content Caching is enabled in the “Sharing” pane of System Preferences). This pane shows information such as how much cached content local network devices have uploaded, downloaded or dropped over time. Note

The information available in the Activity Monitor will depend on what Apple devices and macOS version you are using.

Control Alt Delete on a Mac – How to Open Task Manager on your Macbook

It happens to the best of us: we’re working away on some important project, and our trusty computer freezes. Or rather, a program we’re in just stops responding. So what do you do?

If you have a Windows machine, you can just use the familiar CTRL+ALT+DEL sequence to force quit whatever program is misbehaving. But that doesn’t work on a Mac.

Don’t worry, though – there is one super simple way to force quit on a Mac (and a couple other methods you can keep in your back pocket as well). Let’s learn what that is.

How to force quit on a Mac

The easiest way to force a program to quit on your Mac is a simple key sequence similar to ctrl+alt+delete. Just tap COMMAND+OPTION+ESC, in that order. Here’s where those keys are located on a typical Mac keyboard:

This will bring up a task manager type window that looks like this:

Command+Option+ESC brings you here

Then just select the non-responsive program and hit “Force Quit” which will stop that program from running.

Note: since you’ll be forcing that program to quit in the middle of whatever you were doing, any unsaved data might be lost. Make sure you enable auto-saving, back up your projects often, and keep your computer clean and up to date.

An alternative method

Why learn just one way to force quit when you can learn two? Click the Apple logo at the top left of your screen in the menu bar. Scroll down to “Force Quit” and it’ll bring up the same task manager.

It’ll suggest whatever program you’re currently using

Simple as that!

Now that you’ve dealt with your crashing application, you can get back to work. 

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