Brent Simmons has a great post over at inessential.com on the genius of Apple events. As one of the people behind the ground-breaking Userland Frontier, Brent is uniquely qualified to espouse on the significance and power of Apple events. Frontier, and later AppleScript, leveraged Apple events to let Mac users tie together applications to make workflows that got real things done, even when no single application existed that would do what they needed. I used Frontier for years to automate the back-end of my software business – it was invaluable.
As Brent says:
Picture Jane in her office. She gets an email from Bob every month with the latest WidgetX numbers. With that email in front of her, she double-clicks a script (or chooses one from a scripts menu)… [which] updates and saves (on a shared folder) a Keynote presentation with the new numbers.
This used to take hours, and it was prone to errors. Now it takes a minute or less — and it’s error-free
With Marzipan reportedly coming in macOS 10.15 this year, Apple is further de-emphasizing the cooperative nature of macOS apps, and will most likely not support Apple events in the “iPad apps adapted to run on the Mac” context of Marzipan. Again, from Brent:
What happens to Jane if Mail is a Marzipan app that doesn’t respond to Apple events?
And as Brent says (and as I detailed in an earlier post), many Mac apps use Apple events to directly integrate with other applications. They tie everything together for you, taking your Mac experience from ‘good’ to ‘great’. Just in my own apps, Default Folder X communicates this way with the Finder, Path Finder, ForkLift, Terminal and iTerm2 to give you seamless access to folders no matter where you need them. App Tamer uses Apple events to make sure it doesn’t interrupt iTunes and Spotify when they’re streaming music for you. And there are numerous other examples throughout the Mac ecosystem (and probably on your Mac right now).
Losing Apple event support in Mac applications would be a bigger loss than a lot of people realize – and one I’m not sure Apple is completely cognizant of. My hope is that there’s someone back there minding the proverbial store, but my feeling is that Apple is rushing headlong to open up macOS to UIKit applications to get more apps on the Mac, without regard for some important underpinnings.