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Adam Learns notes

macOS

Changing file-type associations

Section titled Changing file-type associations

If you’re sick of having Xcode open your code-related files and QuickTime open all of your video files, you can do this:

  • In Finder, select a file of the type whose association you want to change
  • Press ⌘I
  • Under “Open with”, click “Change All…”
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  • Note that this is not the same as ⌥Right-clicking a file and choosing “Always Open With”. That option only changes the app for that single file.
  • If you want to make changes like this from the command line, consider using duti and a set of commands like this

Sending SIGTERM to an application (reference)

Section titled Sending SIGTERM to an application (reference)
  • Ensure there are processes of the name that you want: pgrep -i node
  • Send the signal: pkill -SIGTERM -i node
    • Note: in Node, you can catch this with the following: process.once("SIGTERM", () => {})

Troubleshooting

Section titled Troubleshooting

System audio notifications are pitched down

Section titled System audio notifications are pitched down

This is due to some hardware changing the output format.

  • Launch “Audio MIDI Setup” (it’s the name of a built-in app on macOS)
  • Find a device whose output format doesn’t match all of the other ones. In my case, it was this one:
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    • I needed to change that to 48 kHz