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

[J. Landman Gay]

On 8/7/19 1:55 PM, Dr. Hawkins via use-livecode wrote:
> Also, to say something on topic . . . note that OSX is kind of ham-handed on file types.  As near as I can tell, you can’t change the default application manually without applying to all files of that type at the same time.

The Finder is a little misleading. The drop-down menu changes the 
default app for the selected item. Under the drop-down is a label that 
says "Use this application to open all documents like this one." But 
that applies to the button underneath that says "Change all..."

-- 
Jacqueline Landman Gay         |     jacque at hyperactivesw.com
HyperActive Software           |     http://www.hyperactivesw.com