When developing applications, such as with Ruby on Rails or Docker , sometimes you may exit a program but a server or port may still be in use. This means that when you try to reload it, you get an error saying a server is running or the port is already allocated.
How to Force Quit Applications on Mac
This post will show you how to create a shell function so you can enter a command, such as free-port , in your terminal to exit the process running on the busy port so you can use it again. The first step is to identify to process using the blocked port…. View the process IDs of the ports being used with the following command:. For example, to find the process ID of the Ruby on Rails server running on the default port of , you would use:. Now that you have freed up your ports, you can restart that server or application and carry on developing with the knowledge that you can easily unblock ports with a single command.
In a new terminal tab or window use the function, passing the Ruby on Rails server port of as the argument:. And viola! 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.
You can pretty much avoid issues altogether by being a little bit proactive in hunting down the common culprits. Then, you can use CleanMyMac maintenance routines that, when run regularly, will keep you Mac running smoothly. Run other tasks, as necessary.
How to View All Running Apps & Processes in Mac OS X
Likewise, if Spotlight is running slowly, run the Reindex Spotlight task. To kill a background process, use Activity Monitor. 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.
Kill it using the X in the Activity Monitor toolbar. 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. Thanks to CleanMyMac , resetting an app is easy. To do that, click Complete Uninstallation in the same menu instead of Application Reset.
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As you can see there are lots of different ways and apps that help you view and kill processes in macOS. Best of all, all these apps are available to try for free on Setapp , along with over high-quality macOS apps. So check your Mac for problematic processes now and see what you find. How to show which processes consume a lot of memory The easiest way to view all active processes running on your Mac is to launch Activity Monitor from your Applications folder.
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. Clicking on any of those tabs organizes processes according to the percentage of the resource they are using. 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. 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. 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. Kill an unwanted process. Press Enter.
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- About Terminal.
- About Activity Monitor.
The problem process will now quit.