How does OSX tell what app to open when you double click a file?

[Bob Sneidar]

I found this. Didn't read too deep tho'.

https://www.chainsawonatireswing.com/2012/09/19/changing-default-applications-on-a-mac-using-the-command-line-then-a-shell-script/#find-out-the-current-default-for-an-extension

Bob S


> On Aug 6, 2019, at 13:36 , Paul Dupuis via use-livecode <use-livecode at lists.runrev.com> wrote:
> 
> So we make an OSX desktop app in LiveCode that has several document types. We add these to the info.plist file in the App bundle so they are defined, with doc icons, extensions, types, etc.
> 
> If a user has APPv1 installed that has a plist entry for the file extension .myext and then installs APPv2 that also has a plist entry for file extension .myext. how does OSX tell what APP to open when a user double clicks on document.myext?
> 
> 
> I googled and found information on setting default app for document types, but not how OSX handles this by default?
> 
> In window, it is the App's responsibility to check the Registry for its document types and, it it wants to, ask the user if they want those document associated with it. Or it is done by the app's installer on Windows
> 
> I just can't find how OSX does it.