Messing around with certain macOS files could brick your Mac computer, so Apple has made them hard to find. But if you're ...

IDG macOS prompts you when you try to delete items using Option plus Finder > Empty Trash. But if macOS thinks a file is in use by an application or the system, even that bypass doesn’t help.

How-To Master the macOS command line: How to delete files and folders using Terminal The command line is powerful, but also dangerous.