[m!m]

Are we speaking of simply relaunching our own process? If so then we could just use the commandline argument array passed to main which includes the path to the executed executable. You could simply use that if it works on all platforms. If it doesn't work then we can just use the respective OS APIs to get the path.

[karajorma]

I'm talking about spawning a second process using the same command line plus -standalone.

[m!m]

Then I'm pretty sure that the first element of the command line array should work on all platforms.

[Darklord42]

Not sure if it's related, but just in case, I feel I should mention OSX has a nasty tenancy to suppress multiple instances of the same program by default.  To get around it you have to have the system do it with the "open" command.

Something to do with the silly autosave and resume feature in osx.

[Phantom Hoover]

That shouldn't be a problem at the process level — OS X is still POSIX.

[Echelon9]

There's definitely a way to do it on OS X. I'd press ahead getting Windows working first and we can then adjust for other platforms.