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    Mac Guides
    Intermediate
    1 min read 4 stepsJanuary 30, 2026Verified January 2026

    How to Lock and Unlock Files on Mac

    Protect important files from accidental changes by locking them in Finder.

    At a Glance

    Category
    Mac Guides
    Difficulty
    Intermediate
    Read Time
    1 min read
    Steps
    4
    Topics covered
    intermediate
    mac
    files
    lock
    protection

    In this guide (4 steps):

    1. 1.Lock a file
    2. 2.Understand locked behavior
    3. 3.Unlock a file
    4. 4.Lock via Terminal
    1

    Lock a file

    ~15s
    Right-click a file → Get Info (or Cmd+I). Check the "Locked" checkbox at the top.
    2

    Understand locked behavior

    ~15s
    Locked files can't be edited or deleted without confirming. They show a lock icon in Finder.
    3

    Unlock a file

    ~15s
    Open Get Info again (Cmd+I) and uncheck the "Locked" checkbox.
    4

    Lock via Terminal

    ~15s
    For advanced users: use "chflags uchg filename" to lock and "chflags nouchg filename" to unlock.

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    intermediate
    mac
    files
    lock
    protection

    Official Resources

    Apple SupportHow-To Geek — MacApple Support YouTube

    Sources used to create and verify this guide. View all sources →

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