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All-mighty Mac system monitor
There’s a quick keyboard shortcut for that: just press Cmd+Opt+Shift+Escape for a few seconds to quit the application in front. You can also press Cmd+Opt+Esc to bring up the Force Quit menu.
- 2) Force Quit Currently Active Mac App with the Keyboard. Hold down Command+Option+Shift+Escape for a second or two until the app forcibly closes. Be sure to do this while the app you want to force quit is the foremost application on the Mac, as it will force quit whatever is active when held down.
- I don’t want to delete the Google Drive app from my Mac, of course. I just want to stop it from automatically launching when I boot or log in. To stop Google Drive (or any other item in your own list), all I need to do is click once on its name to select it and then click the small minus button at the bottom of the list.
Control CPU, memory, and whatnot with iStat Menus app.
When your Mac slows down or starts behaving erratically, chances are it's because an application that's running, perhaps in the background, is misbehaving. And if it's not an application that's causing the problem, it will almost certainly be a process associated with macOS or an ancillary service.
Solving this problem is usually as simple as killing the process, but in order to do that you need to identify which one.Here's a comprehensive guide on how to view and kill processes on your Mac.
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Best task killers for Mac
Try the best tools that help you find and kill processes hampering your Mac's performance.
How to show which processes consume a lot of memory
Wifi network app mac. The easiest way to view all active processes running on your Mac is to launch Activity Monitor from your Applications folder. In the default CPU tab, you can see how much processing power every process takes, ranked by the most consuming. And if you switch to the Memory tab, you will see the same list ranked by the amount of used up RAM.
For more immediate and elaborate information on how your computer resources are consumed, use iStat Menus, which handily lives in your menu bar and, in its MEM table, shows you applications and processes that are consuming more than their fair share of RAM in real time.
How to kill process using Activity Monitor
- Launch Activity Monitor.
The easiest way to launch Activity Monitor is to press Command and spacebar to call up Spotlight, then start typing Activity Monitor. When it appears in Spotlight, hit Return to launch it. Alternatively, go to Utilities in the Applications folder and double-click on its icon. Or open Activity Monitor in one click through iStat Menus app. - View and filter tasks.
You'll notice there are five tabs across the top of the Activity Monitor window: CPU, Energy, Memory, Disk, and Network. Clicking on any of those tabs organizes processes according to the percentage of the resource they are using. So, clicking on CPU lists tasks in the order of how much CPU capacity they're using. By default, processes are ordered starting with the one that's consuming the most of the resource at the top, so you can quickly see where problems are occurring or likely to occur. To flip the order, so that processes consuming the least of the resource are at the top, click the arrow next to Memory or CPU above the list of processes. - Kill problematic processes.
When you identify a process that's causing a problem, either because it's hogging lots of CPU cycles or memory, or because it's highlighted in the Activity Monitor as having crashed, you need to kill it. To do that, click on the process first and then on the X in the Activity Monitor toolbar. The process will quit and free up the resources it was taking up. If it's a critical process, it will restart. If it's an application, it will remain shut down.
Activity Monitor alternatives
Get an advanced system monitor for macOS – an improved alternative to the default program.
How to shut down processes using Terminal
- Launch Terminal. Press Command and spacebar to pull up Spotlight then start typing Terminal. When the Terminal app appears in Spotlight, tap Return to launch it. Alternatively, navigate to the Utilities folder in Applications and double-click Terminal.
- View processes. When Terminal has launched, type 'top' into the Terminal window. You'll see a list of currently running processes. At the top of the list is an overview of the processes that are running and the resources they're consuming.
- Kill an unwanted process. When you identify a process that's causing a problem or consuming too many resources, take note of the number in the PID column next to the name of the process. To kill the process, type 'kill -9' followed by the PID number. Press Enter. The problem process will now quit.
How to prevent problematic processes
You can pretty much avoid issues altogether by being a little bit proactive in hunting down the common culprits. Here, iStat Menus will help you identify which applications or processes are consuming finite resources, such as CPU and RAM.
Then, you can use CleanMyMac maintenance routines that, when run regularly, will keep you Mac running smoothly. Here's how to do that:
- Launch Setapp and search for CleanMyMac.
- Find the maintenance scripts. Under the Speed section in the left sidebar, click on Maintenance. You will see a list of tasks that CleanMyMac would suggest you to perform to optimize your Mac. You should try to run them all, but the one especially important for us is under Run Maintenance Scripts.
- Run the maintenance scripts. Click on the checkbox next to Run Maintenance Scripts and then click Run. Alternatively, choose another specific maintenance script such as Speed Up Mail or Reindex Spotlight and click Run. When it's finished, click Select Tasks to return to the list of maintenance tasks.
Run other tasks, as necessary. If you're having problems with Mail, repeat step 3, but this time click the checkbox next to Speed Up Mail. Likewise, if Spotlight is running slowly, run the Reindex Spotlight task.
How to kill a background process
To kill a background process, use Activity Monitor. While the steps are the same as described in the 'How to kill a running process using Activity Monitor' section above, the key difference is that background processes often have obscure names that don't clearly describe what they do.
Be careful when killing a background process and, if not sure, leave it alone or search online for its exact role in your system. Otherwise, you might risk causes problems for your macOS. Generally, background processes don't tend to consume significant RAM or CPU cycles, so if you spot one that does, it has probably got into trouble. Kill it using the X in the Activity Monitor toolbar.
How to easily remove startup items
One common cause of Macs running slowly or having problems is items that launch automatically at startup. These could be helper apps for something like iTunes or just complete apps in their own right. They are also frequently apps you once used but no longer need.
To review the apps and helpers that startup when you log in
- Launch System Preferences from the Apple menu and click on the Users & Groups pane.
- Click the padlock and type in your password.
- Then select your username in the left panel and click the Login Items tab.
- Look through all the login items that correspond to apps you no longer use and then click the minus button. The app will no longer start up automatically when you log in.
How to Force Quit an application that's not responding
If you see the dreaded spinning beachball, or an app just won't do anything, you should force quit it. Antivirus software application.
There are several ways to force quit an unresponsive application:
- Press Command-Alt-Esc and click on the application in the window that opens. Press Force Quit
- Control-click or right-click on the application's icon in the Dock and choose Force Quit
- Launch Activity Monitor, locate the application and press the 'x' in the toolbar
- Locate the process in Activity monitor, look for the entry in the PID column and launch Terminal. Type 'kill -9' followed by the PID number. Press Enter
Fix crashing apps with Spindump
While Force Quit will fix the problem, it’s a temporary solution. If you’re determined to identify the source of crashing apps and prevent them from happening, use Spindump on Mac. It’s a hang reporting tool that alerts you about the crash and helps share the details with the app developer.
Whenever the app crashes, it will trigger Spindump and send the information to Apple or the app developer. Not only does it help you understand what just happened, but it also helps the developer track the conditions of app misbehavior — and fix it accordingly. A win-win.
How to create a Spindump file on Mac
- Launch Activity Monitor via Applications > Utilities
- Pick the app for which you want to create a Spindump file, then click on the Settings icon
- Select Spindump or Run Spindump
- Wait a few seconds for the file to generate
- Click Save.
Reset a problematic app
There's one more thing you can try if an app keeps running slowly or crashing – reset it. Thanks to CleanMyMac, resetting an app is easy. Here's what you need to do:
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- Locate the uninstaller. In the left hand sidebar of CleanMyMac, click on Uninstaller under Applications.
- Find the app that's causing a problem. Scroll through the list of apps until you find the one that's been crashing or running slowly. Click on it to highlight.
- Reset the app. With the app highlighted, you'll see all the files associated with it in the right-hand window. Click Application Reset at the top of the window and all the files, except the main application file, will be selected.
- Click Uninstall. All the selected files will be trashed, effectively resetting the application to its default state. When you launch it the next time, it will behave as if it has just been installed — so you'll need to recreate any custom settings or preferences.
If resetting the app doesn't work, the final resort should be to uninstall the app completely and reinstall it. To do that, click Complete Uninstallation in the same menu instead of Application Reset.
As you can see there are lots of different ways and apps that help you view and kill processes in macOS. iStat Menus is a great way to passively monitor which processes are causing problems, so you can launch Activity Monitor and quit them. And running CleanMyMac's maintenance scripts regularly prevents problems occurring in the first place. Best of all, all these apps are available to try for free on Setapp, along with over 200 high-quality macOS apps. So check your Mac for problematic processes now and see what you find.
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What are startup items?
Startup items, or login items, are services and applications that launch every time you start your Mac. These are applications that sneak into startup items without notice, never asking if you need or want them there. This way you may end up with a dozen apps launching as soon as you turn on your Mac, weighing heavily on its processor and memory capacities and slowing it down. Such items can increase your Mac’s startup time and decrease its performance.
Plus, sometimes when you remove an application or a service, it leaves a login item with a broken link. These broken login items are completely useless, cause unwanted messages, and waste your Mac's resources (because they look for non-existent applications). Whether you're running macOS Catalina or El Capitan, or earlier — it's all the same, so just read on.
So, let's go over how to take control of login items, and how to get rid of unwanted, broken or hidden startup items.
How to disable startup programs?
Do you want to stop programs from running at startup? There’s an easy way to remove programs from startup and get your Mac to load faster on launch. The fastest way to turn off startup items on Mac is an app like CleanMyMac X.
- Download CleanMyMac for free.
- Launch the app.
- Open Optimization tab.
- Click on Login items.
- From the list of apps, disable the ones you don’t need on startup.
- Done!
How to change startup programs manually?
Disabling Mac startup programs is possible manually. Therefore, if you have some time and would like to do it yourself, follow the steps below.
Your login items are listed in settings. One of the easiest ways to control startup items is inside System Preferences > Users & Groups.
- Open System Preferences.
- Go to Users & Groups.
- Choose your nickname on the left.
- Choose Login items tab.
- Check startup programs you want to remove.
- Press the “–” sign below.
- You’re done.
- If you need to add an item back, press “+” and choose the app you’d like add.
- Then restart your Mac to see the changes.
How to fix broken startup items?
How To Stop App In Mac
Broken Mac startup files are left there because some part of apps are left on your Mac long after you’ve moved the app to the Trash. To get rid of these parts and to fix your startup, you’re going to need CleanMyMac again. First, you need to check if they’re among startup items and disable them if so. You can do it following the instructions above. Then you need to remove app leftovers. CleanMyMac works fine on macOS High Sierra and earlier OS.
- Launch CleanMyMac.
- Choose Uninstaller tab.
- Scroll through the list of apps.
- If you spot any app that you’ve deleted, check them.
- Delete the app leftovers you’ve chosen.
You can also find and remove broken login items with the help of System Junk module:
- Choose System Junk tab.
- Click Scan.
- Review details and click Clean.
Finally, you need to clean your macOS startup items through launch services:
- Open Maintenance tab.
- Choose Rebuild Launch Services.
- Hit Run.
- Done.
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Once you do it, all broken app data on your Mac will be fixed.
Remove daemons and agents from startup process
If speaking of files, first go to the system folder /Library/StartUpItems. Here you’ll find all the startup files that are being launched with the system. You can delete the login item you think is necessary if you’re totally sure what you are doing.
Also, the /Library/LaunchDaemons folder contains a bunch of preference files that define how the application that is being launched along with the system should work. You might want to delete some of these files as well if you know you don’t need them and removing them is safe.
How To Stop App In Mac
The /Library/LaunchAgents contains preference files responsible for the apps that launch during the login process (not the startup).
The above-mentioned folders contain app-related files. However, you can also check system folders to review whether you need some of the system applications to be running on startup:
- /System/Library/LaunchDaemons - note that besides preference files this folder contains other important system items that are recommended to keep untouched.
- /System/Library/LaunchAgents - most probably, you won’t also find anything worth removing in this folder, however, keeping this location in mind might help you find files related to a problematic app that causes troubles on Mac startup. If you have a problematic application that messes about on login, you can try to trace it back from this folder.
Stop App Update Mac
But, if you’re looking for simple ways to remove login items, we suggest using a professional Mac utility. Download CleanMyMac X for free and make unwanted and broken login items a thing of the past.