Speed Up Your Mac

Note: If this tutorial worked for you (and it should work), please leave a comment below. Thanks.

Every so often you Mac will use 100% of it system resources trying to complete a task. This is not normally a problem, however you may want to pause an application or a process so you can quickly complete another task. For example if iTunes is using 100% of our system, you may want to temporarily pause it to free up you system. You can then re-enable it and allow the application to resume. I like to use this trick if I want to quickly run a CPU intensive app while my system is running and I want to give it all of my system resources, but something is taking up the CPU cycles.

Pausing An Application

To pause an application we first need to find it’s PID. This is a unique number that identifies the application or process that is running. To find this ID open Activity Monitor located in your Applications > Utilities folder.

One of the columns should be named PID, if you can’t find this column, go to View > Columns and select the Process ID option. Find the process you want to pause and take a note of its number. You can sort the columns so it isn’t too hard to find the one that is taking up 100% of you system.

The PID of an application or Process is located Activity Monitor.
Now we have the number open Terminal located in your Applications > Utilities folder. Type the following into the Terminal window.

kill -STOP 1234

You will notice that the application will be paused and it will not be accepting inputs or outputs. This can be tested on pretty much any application, for example if you try it with iTunes, it will stop playing music, quick time will stop playing videos any app which have this command applied will be paused.
To start an application again type the following into Terminal. Note that the same PID number should be used.

kill -CONT 1234

It is a simple trick but one that is very useful. For example if iTunes is taking for ever to import a music video, or quicktime is taking its time to export a video, you can use this trick to pause the application, do something else and then restart the app.

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