The limitation of a single instance of Skype is due to a Skype restriction in this case, but according to the book Skype Hacks by Andrew Sheppard it is possible to run multiple instances of Skype under the same user session in Mac OS X (and in Windows and Linux as well), as reported in page 102 and 123 of the book. How To Run Multiple Instances Of The Same Application On Mac OS X. Easy To Follow Tutorial On Launching Two or More Instances Of The Same Program on Mac OS X. Open -n /Applications/MonoDevelop.app Note also that MonoDevelop is capable of opening multiple solutions. To do this, simply uncheck the 'close current solution' checkbox in the 'Open' dialog, or hold down the control key when clicking on one of the recently opened projects in the Welcome Page. If you also like using WhatsApp Web on your Mac or Windows PC, you would really appreciate this trick. Let me show you how it works! How to Use Multiple WhatsApp Accounts on Desktop. Launch WhatsApp on your mobile device. On your iOS device, tap on Settings app → WhatsApp Web/Desktop. It simply will not be possible to run multiple copies of the same (Windowed) app on a single system / user account. You might be able to run multiple Transmission daemons. I'm not 100% sure if that's possible, but on Linux I run Transmission headless. To do so, they would each have to listen on different ports. – Jason Salaz Aug 22 '13 at 2:57.

In version 0.8.5 it was easy to have multiple instances of VLC playing each with its unique stream of data.

• 1Graphical

Graphical

Windows

In versions 2.1.x and 3.x.x playing multiple VLC instances and different streams in each is as easy as clickingTools → Preferences... (or just pressCtrl+P):

• in the Interface tab scroll down to playlist and instances
• untick checkboxAllow only one instance
• untick checkboxuse only one instance when started from file manager
• PressSave.

This allows users to use more than one VLC player at a time. Once you've done the above you should be able to play as many VLC instances and video or audio files as you like.

macOS

On the Mac, running multiple instances of VLC is not supported out of the box.

As a workaround, you can create a Droplet/App that does the following:

• launch the VLC droplet/app to get a separate instance of VLC,
• drop one or more files onto VLC droplet/app, or
• associate your .mov, .avi, and other files directly with the VLC droplet/app, allowing you to simply click on the files to launch the files in a new standalone VLC session.

Paste the code below into a new AppleScript Editor script and save it as an application.

File Association with the Droplet/App can be done as follows:

1. OpenFinder and find the video file of interest
2. Right click on the file (assumes you have right click enabled)
3. Choose Get Info
4. Under Open with:, click dropdown and select the VLC droplet/app
5. ClickChange All button
6. If prompted 'are you sure', select 'Yes'.

Command-line

Use the option --no-one-instance.

On *nix systems you can create background jobs:

On Windows systems you might use START:

Tighten is a consultancy. That means we're not just a product company; we also work on other people's applications and sites.

Frequently, one or more of our developers will be tasked to work with the same client for months. Every day they wake up, open up Slack--which is the primary tool Tighten, as a remote company, uses to build culture and relationships--and switch to the client's Slack.

We've noticed that those folks whose client has their own Slack have less of a chance to participate in Tighten conversations and events. So, I set out to find a way to make it possible to have two local apps for Slack.

Most-desirable-but-not-possible option: Multiple local Slack apps

The best solution--which is not possible, as far as I can tell--is to have two versions of the official Slack running locally with a unique list of workspaces open in each. The app is great, it's standalone, and it has some niceties that aren't present using Slack in the browser.

But even if you try to force Slack to open multiple instances, it'll just collect them together. No luck there.

Less-desirable option 1: The switcher

Obviously, the simplest option is to use the left panel switcher that the Slack app allows for:

However, when you're 'in' one Slack workspace, all the rest can sort of disappear by the wayside. We want something that keeps our Slack more present.

Less-desirable option 2: The browser

Our devs could, of course, open Tighten's slack in their browser. But even with pinned tabs, browser windows still sort of ebb and flow; an individual item in a browser doesn't get its own cmd-tab; and the browser doesn't get quite the same quality of some of the keyboard shortcuts and other system integrations.

All-in-all, Slack in a browser window is fine, but a second-class citizen.

Best option 1: Shared channels

I didn't mention this in the original version of this post because I consider it helpful but separate, but enough people mentioned it that I figured I would add it. Recently Slack added a brilliant feature called shared channels that allows you to sync a channel between your Slack and another workspace.

If you can handle your communications with the other workspace within one or a few channels, and you have a relationship set up such that shared channels will work, that's absolutely the best way to go about it. You can avoid the slow-down of multiple workspaces but still get the benefits of collaboration.

The remaining options--and the less-desirable options above--assume you're in a context where that's not an option.

Best option 2: Cloning Slack

This tip is from Tightenite Dave Hicking:

You can duplicate the Slack application file (using Finder) on your Mac and rename the second version, and then you'll just have two instances that you can open side-by-side.

Pro: You get the full power of desktop Slack on both.

Con: If you have more than one workspace, you're now spinning up two instances of a local Slack instance with multiple workspaces. Slack uses up a lot of memory, and two full local Slack instances connected to multiple workspaces each will really amplify that. Also, every notification will be duplicated across all of your workspaces.

Best option 3: Single-Site Browsers

Open Multiple Instances Of Application Mac

That leaves us with the other best option: single site browsers, or SSBs. An SSB is a desktop app that wraps a web site in its own process and often a simpler browser chrome. SSBs have dropped in popularity over the last few years, but they're still possible. The best tool for creating SSBs on Mac is called Fluid.

When you use Fluid, you point it at a specific web site, and it will generate an SSB for that web site. That means you use Fluid once to generate the SSB, which is a Desktop app that has its own icon and its own process. You then forget about Fluid, and take the generated SSB and place it anywhere on the desktop or the dock. You can now open or close it independently of your browsers, cmd-tab to it as its own entity, and it will generally act as its own completely independent application--even though it's just Webkit.

Open Multiple Instance Of App Mac Torrent

Pro: You can have a desktop app devoted to just the one Slack workspace you want to run separately from the rest, which means it consume less memory than a full duplicate of the desktop app.

Con: Because it's browser-based, instead of the true Electron Slack app, it's not quite as perfectly integrated with the desktop. For example, CMD-T in the desktop app is the same as CMD-K. But CMD-T in an SSB version opens a new tab in the SSB. Also, every notification will be duplicated in the one workspace you have open in your SSB (assuming you also have it open in your desktop Slack app.)

Setting up a dedicated Slack instance using Fluid

Step 1. Download the free Fluid app.

Step 2. Open the app.

Step 3. Enter your workspace's URL, and the title.

Open Second Instance Of App Mac

Step 4. Create it.

Open Multiple Instance Of App Macros

Step 5. Open your new Slack app--right next to your actual Slack app. Boom. Done.

Open Multiple Instance Of App Mac Os

Any other tips or tricks? Hit me up on Twitter.