How to lock files in macOS Big Sur's Finder
The Finder lets you lock files, but some aspects are a little obscure. Mac 911 Jan 21, 2021 7:15 pm PST Apple File locking has a long tradition in computing: you or independently running software wants to make sure that a file isn’t modified or deleted when it’s needed or in use. Because macOS is Unix based, it offers file-level permissions flags that control how a file can be manipulated and by whom. But macOS has long had a separate way to lock a file from the Finder ...
Source: macworld.com