[MlMt] mailmate on the dock

[Bill Cole]

On 15 Aug 2016, at 9:40, Robert Brenstein wrote:

> At first glance, it looks like the script that does the upgrade failed 
> to remove the old icon from the dock.

That's not how it works. Apps (and their installers) don't manage their 
own icons in the Dock.

The icon you see in the Dock is determined by Launch Services, a Mac OS 
X subsystem that keeps track of file types and associated "kind" 
strings, icons, URL scheme associations (and probably other details that 
are slipping my mind...) for all apps. Launch Services is essentially 
the MacOS X replacement for the Finder's "desktop" files in classic 
MacOS. It has difficulties with edge cases like the existence of 
multiple versions of an app in different places that both are 
represented in metadata (Spotlight) indices. The most an app installer 
can do is explicitly tell LS to register an app that it has just 
installed, however it sometimes seems like LS doesn't do as it is told. 
If I knew why this was, I'd be sending my resume to Apple because no one 
there has been able to work it out for about a decade...