What Is the macOS Accessibility API? How System-Wide Tools Work
The macOS Accessibility API is a system framework that allows applications to interact with UI elements in other apps. It enables tools like Echoo to read selected text and replace it with transformed content in any application.
Explanation
When you select text in any app and press an Echoo shortcut, here's what happens: Echoo uses the Accessibility API to read the selected text from the active application, sends it to the AI provider, receives the result, and uses the API again to replace the original text.
This is the same API that screen readers (VoiceOver), window managers, and other accessibility tools use. Apple designed it to enable assistive technology, but it also powers productivity tools that need to interact with text across applications.
Because the API has broad access to app content, macOS requires explicit user permission. You'll see a permission dialog the first time you use Echoo, which is normal and expected.
How Echoo Helps
Echoo uses the Accessibility API to work system-wide in every Mac app. This is what makes the "select text, press shortcut, get result" workflow possible. The permission is required once and enables all of Echoo's text transformation features.
Related Terms
Keyboard Shortcuts for Productivity
AI keyboard shortcuts are key combinations that trigger AI-powered text transformations directly in your current application. Instead of copy-pasting text to an AI tool, you select text and press a shortcut to transform it in place.
AI Text Transformation
AI text transformation is the process of using artificial intelligence models to modify, improve, or convert text. This includes grammar correction, translation, summarization, tone adjustment, and rewriting.
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