Launch & Run Multiple Instances of Any Application on Mac OS

Launch & Run Multiple Instances of Any Application on Mac OS

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You can run multiple instances of any application in Mac OS X with a little bit of command line magic. By using the ‘open’ command to launch GUI apps from the terminal, we can run a new instance of any app, even if it’s already running.

In its simplest form, we just point open to the application with the -n flag. For a practical example, we’ll use the Safari browser:

open -n /Applications/Safari.app/

This will start a new instance of Safari, even if Safari is already open. You can repeat this command to start as many instances of the app as you want.

However, instead of repeating the command over and over, let’s make it even easier to launch multiple instances of the app. What if you want to launch five new versions of Safari? Assuming you’re using bash we’ll use this command:

n = 5; for ((c = 1; c

That’s a bit of a complicated string to type over and over, so we’ll make it easier by creating an alias in your .bash_profile:

First you need to open .bash_profile in a text editor, nano is nice and easy:

nano ~ / .bash_profile

Now paste this into a new line (assuming it has other aliases from our recent tips or otherwise), make sure everything is on one line:

alias safarix5 = ‘n = 5; for ((c = 1; c

Save changes to .bash_profile by pressing Control + O and pressing Return

I mentioned the alias ‘safarix5’ for Safari X 5 as that string will start 5 instances of Safari, but you can name it whatever you want. If you want to use Safari in 10 different instances, all you have to do is change the variable ‘n’:

alias safarix10 = ‘n = 10; for ((c = 1; c

You can change the application to whatever you want, but keep in mind that each running instance of an app will consume the full amount of resources for that app. Web and app developers should be particularly happy with this trick, but there are plenty of other uses too.

If you liked this check out more command line tips and tricks.

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What is actual time in which this method complete?


The time to complete the Launch & Run Multiple Instances of Any Application in Mac OS X tutorial is 10+ minutes.

What are the supported Device?


Apple

What are the supported Operating system?


mac OS



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