42 Astoundingly Useful Scripts and Automations for the Macintosh

42 Astounding Scripts, Catalina edition

I’ve updated 42 Astounding Scripts for Catalina, and added “one more thing”.

Jerry Stratton, September 2, 2020

I never upgrade my phone just before a trip, and I never upgrade my computer during a major project. Two weeks ago, however, I finally put The Dream of Poor Bazin to bed. You can buy it on Amazon or any of the usual eBook sites.

So last week, I finally got around to upgrading to Catalina.

The upgrade went pleasantly well, and very quickly. It may have been the easiest macOS upgrade yet. I have now updated 42 Astoundingly Useful Scripts and Automations for the Macintosh for Catalina. If you have the ebook, the updated version is already available at the store you bought it from, if not already downloaded to your e-reader.

If you have the print version, or if you’re just interested in what had to be changed for Catalina, I’ll have more about the specific changes later, but for the most part the scripts continued to work after the upgrade. As expected, any scripts that talk to iTunes needed to reference Music instead of iTunes. Less expected, one of the sound-effect scripts needed to change how it detected that the sound was done playing. And in the completely weird, the Contacts app started adding strange characters around some of the data it provides to the JavaScript engine.1

One more thing: the Speed Playback script is no longer necessary. Sped-up playback in iTunes was meant for speeding playback of podcasts. Podcasts now have their own app and that app includes the ability to speed podcast playback, making this script superfluous in Catalina.

You can still use the Speed Playback script on your music files, of course, if you enjoy hearing your favorite artist sound like a chipmunk. But the book is titled “astoundingly useful scripts”, not “moderately amusing scripts” despite my glee in getting Fiona to quote Hunter Thompson in the voices script. I decided to remove Speed Playback and replace it with something both astoundingly useful and moderately amusing. I’ll post the code for Speed Playback in a few weeks.

The Speed Playback script grew out of an older script that hasn’t worked for years. Quicktime Player used to be able to play files backward. This meant being able to judge for yourself whether Led Zeppelin was using Satanic backmasking in “Stairway to Heaven”. It also meant being able to listen to some of the strange things artists sometimes hide in their music.

So I decided, for the Speed Playback replacement, to write a script that plays music backward. I took a look at the various AVAudio classes and, with a bit of work, wrote a script that can read music files (or just about any audio file) on your Mac, uncompress them, and reverse the data. And then play it back or save it to a WAVE file.

So if you ever wanted to use backward clips from songs or other audio as your ringtone, the new clipper script makes it easy. Here’s a sample clumsily-backmasked mp3 file. Download it and play it. Starting at about 16 seconds and ending at about 32 seconds there’s some satanic gibberish. What is it? The clipper script can tell you:

  • clipper "Secret Battle.mp3" --reverse --from 32 --for 16.5

It will start at thirty-two seconds in and play for sixteen and a half seconds backward, back down to 16 seconds in.

The Secret Battle (1.0 MB MP3 file)

The new Catalina-friendly version of 42 Astounding Scripts is currently available in print at Amazon and as an eBook at Smashwords, Apple, Barnes & Noble, and many other ebook retailers.

It still contains the ASCII art script for turning your photos into ASCII art, the piano script for playing melodies and turning them into MIDI files for Garageband, and all the other great scripts of the Mojave edition.

September 26, 2020: Safari 14 disables Automator Quick Actions in text fields
Bug Alert

There appears to be a bug in Safari 14, released for macOS Catalina on September 17, that makes Automator Quick Actions fail. This was extremely annoying. In the morning, I was able to write in markdown on blog comments, and in the afternoon I was not.

What happens is that, if you select text in a text field in Safari and choose to run a Quick Action from the Services menu, the Quick Action runs—if it does anything outside of Safari, you’ll see those actions happen—but it replaces the text with nothing rather than with the output of the service.

You can undo to get your raw text back.

This will affect any of the simple BBCode and HTML verification/conversion scripts in 42 Astounding Scripts that are meant to be run in forum posts or blog comments.

I’m writing this in Brave, so as to be able to use markdown while writing this post. I’ve verified that Google Chrome also still works with Quick Actions. Another option would be to write it in a text editor, run the conversion, and then copy and paste it into Safari.

I’ve also used pbpaste and pbcopy as a stopgap, since most of my Quick Actions are command-line scripts.

  • pbpaste | moronify | pbcopy

will take whatever text I just copied, run it through the “moronify” script, and then copy it to the clipboard so that I can manually paste it back into the text field it came from.

You can test that Quick Actions are half-working in Safari with a simple two-step “Hello, World” Quick Action. In Automator, create a new Quick Action. Make the first step a “Run Shell Script” that pipes the selected text to a text file on the Desktop.

  • cat >> ~/Desktop/test\ services.txt

Make the second step a “Get Specified Text” that produces the text “HELLO WORLD”.

Hello World Service

A simple Quick Action in Automator to test Services in Safari.

Save it as “Hello, World”.

In any text editor or word processor, or an editable text field in any web browser other than Safari, selecting some text and running Hello, World from the Services menu will (a) write the selected text to the test file on the Desktop, and then (b) replace the selected text with “HELLO WORLD”. In Safari, it will write the text, but it will replace the selection with nothing.

  1. The JavaScript engine has had serious issues for a long time now, and may, sadly, be on its last legs. I’ll be pleasantly surprised if it survives once scripting languages have to be manually installed.

  1. <- Catalina iTunes XML