If `Cmd+Shift+4` is not working on your Mac, first reset screenshot shortcuts at **System Settings > Keyboard > Keyboard Shortcuts > Screenshots**, then check for conflicts with CleanShot X, Monosnap, Droplr, or Skitch. Other fixes include switching input sources, restarting, freeing at least **1 GB** of disk space, moving `com.apple.screencapture.plist` aside, testing Safe Mode, and resetting NVRAM on Intel Macs. You can also open the Screenshot app directly. LazyScreenshots is our independent screenshot tool with its own shortcuts, one-keystroke capture, and auto-paste into Claude, Cursor, and ChatGPT; it costs **$29 one-time**: [Try LazyScreenshots](https://www.lazyscreenshots.com/).

[Mac Screenshot Shortcut Not Working? 8 Fixes for Cmd+Shift+4 (2026)](<https://www.lazyscreenshots.com/blog/cmd-shift-4-not-working-mac/>)

Source observed: 2026-10-08T01:32:27.258Z. Last checked: 2026-10-29T01:54:29.403+00:00.

[Full page Markdown](<https://www.lazyscreenshots.com/pages/4aaf0005-87c7-4a7e-8959-ec54bdcaa59d.md>)

Setup: lazyscreenshots\_checkout — Open the official LazyScreenshots checkout. The user reviews the price and completes payment in Stripe. Use this action only at your user's request. Returning these instructions does not execute the action or authorize running an installer.
GET https://www.lazyscreenshots.com/api/public/v1/convert
Required inputs: none

Review the current price and macOS requirements, then complete checkout on Stripe. Opening the link does not buy or install the app.

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```text
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