Open two instances of unity at once

How do I open two instances of the editor at once?
I have read about the “Always open project wizard” option however the option is no longer there in Unity 5

Any help would be appreciated.

If you are on a Mac, you might consider duplicating your install, if that’s permitted.
I have duplicated installations of Blender, for example, working perfectly fine.
But if you have any licenses installed, this method may cause problems.

The “show project wizard” preference is still there, it’s just that the default is the opposite (it used to only show the project wizard if you told it to, now it always shows the project wizard unless you tell it not to). In any case, that’s not actually relevant; all you have to do is have two copies installed. On OS X, if you’re willing to launch apps from the command line, then you can do it that way and you don’t even need two copies.

–Eric

Really? Could you tell me how? That sounds amazing!
When I try something like “open /Applications/Safari.app” in the Terminal, it will just open the last window of the app that’s already running.

EDIT:
Alright, I found it. “-n” is the key here. So in my example “open -n /Applications/Safari.app” opens another instance of Safari. Very useful! Thanks for pointing this out!

EDIT2:
Typing something like "do shell script “open -n /Applications/Safari.app”" into the Apple Script-Editor and exporting it as an application from there will make this function very easy to access.