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Design Mac lock screen messages that fit.

LockLines creates plain-text messages for macOS lock screens. Preview what appears first, add scroll-down details, decorate the text, and copy a message ready for System Settings.

LockLines copy screen showing the final lock screen message and lock screen preview

Built for the small message area macOS gives you.

Use LockLines for owner notes, contact information, asset labels, test machines, shared Macs, or any message that needs to be readable before someone reaches the desktop.

From message idea to paste-ready text

The app follows the same workflow shown in the screenshots: visible text, scroll text, preview, copy.

01

Write the first screen message

Shape the visible message people see before they scroll, such as a return prompt or owner contact teaser.

02

Add scroll-down details

Add the longer owner note, pickup instructions, asset label, or test-machine details that appear after scrolling.

03

Preview both states

Switch between visible and scroll previews so the lock screen layout is understandable before you copy anything.

04

Copy for System Settings

Copy the complete plain-text message and paste it into macOS Lock Screen settings.

Preview the exact lock screen states

LockLines separates the first visible message from the scrollable details, then shows both inside a lock screen preview.

Visible message editor with lock screen preview
First-screen message with repeated-character border controls.
Scroll text editor with lock screen preview
Scrollable message details with styled plain-text boxes.
LockLines intro screen with app explanation
Intro walkthrough explaining the plain-text lock screen workflow.

Useful anywhere a locked Mac needs context

A good lock screen message can turn a found device, a shared asset, or a test machine into something understandable.

  • Lost Mac return instructions
  • Owner contact notes
  • School and office asset labels
  • Conference or demo machines
  • Repair intake or lab devices
  • Scroll-down prompts for longer messages

Made by the developer of Parall, DockLock Lite, and App Trust Preview.

LockLines is made by Ihor July, a cybersecurity expert and reverse engineer focused on secure, privacy-respecting macOS tools. The same developer also builds Parall, DockLock Lite, and App Trust Preview for Mac users who care about predictable native utilities.