om36mo wrote:
Perfect. Thanks for the help. How do I know which ones I do still need, though?
If you don't know what it is then don't delete it. Only delete the stuff you recognize as having deleted or no longer have installed.
Also, does the same apply for folders in the Application Support folder? I see several folders from apps I uninstalled, which the uninstaller app apparently missed.
Yes, same thing applies.
Why does macOS leave all these leftovers? Seems like a huge waste of space. Your Mac just gets filled with files you no longer need or use. And I don't know which files I can safely remove as a basic user.
It's not macOS it's the developers who wrote the application. They are responsible for installing and uninstalling their App and they typically do a terrible job at it. In the Enterprise world, we frequently end up tearing apart an installer and re-doing it to ensure it works the way it is supposed to. It is not just macOS and it's far worse on Windows and Windows provides an uninstall feature that macOS lacks.
If done correctly an install and uninstall on macOS can be delightful. You open a DMG, drag the App to /Applications and when you drag it to the Trash scripts within the App remove the extraneous clutter. If installed as a package there should be an uninstall script somewhere that cleans up fully. But it is rare to see this done and done properly.
While I don't condone Mac utility software such as cleaners and App removers as they frequently cause issues where people come here with a problem and it turns out to be some rogue CleanMyMac app that is a fake one. Just be careful where you download such tools. Make sure it comes from the vendors website directly or is on the App Store. If outside of the App Store, make sure it's signed by a developer. If macOS complains about it not being signed nor notarized you should think twice before installing it.