In particular, I'm trying to use Calibre for eBook management. Interestingly, this has never happened with any other app before, but when I quit the app (CommandQ), it's almost as if I never installed it in the first place.

Any insight into what is going on?

  • How are you launching Calibre after you install it? What version Calibre and macOS? In your title you mention "programs." What other programs are you experiencing this with? – Allan Jan 12 '20 at 14:46

You might be running them from their DMG file, usually located in the folder where you set your downloads to go to.

Apps you want in your /Applications folder, you have to copy them there. That's why most DMGs provide Applications' alias in the DMG.

Use spotlight or apps like Easyfind to find the relevant installer.

  • spot on! I wasn't clear on this difference and why it might exist in the first place. Thank you – Tycholiz Jan 12 '20 at 15:41

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