The DEVONtechnologies Blog
January 29, 2026 — Eric Böhnisch-Volkmann
The second feature release for DEVONthink 4 — DEVONthink 4.2 Cassini* — introduces a refreshed look with a new app icon and full support for Apple’s Liquid Glass design on macOS Tahoe. On macOS Sequoia and later, sidebars and inspectors now animate smoothly in and out, and the Navigate sidebar is spring-loaded. Simply drag items to the window edge to reveal it automatically. PDF documents on macOS Tahoe also respect your dark mode preference for more comfortable reading.
The chat assistant gains powerful new capabilities: adjust many options directly within the chat window, and access up to 50 saved conversations to pick up right where you left off. You can now choose between DEVONthink, Perplexity, or Exa for web and Wikipedia searches, giving you control over speed versus freshness. Updated AI models including Claude 4.5, GPT 5.2, Gemini 3, and Google Nano Banana Pro, deliver improved performance across all AI use. When generating images, you can choose the aspect ratio.
New workflow tools help you work faster: the detachable Graph popover lets you visualize document connections, you can manually save named versions for finer revision control, and annotation documents are now easier to create, locate, and open directly from menus and inspectors. Markdown documents also support smart quotes and dashes for polished typography.
For users of the legacy generation of DEVONthink, we’ve released version 3.9.17 with quality-of-life improvements and bug fixes.
You can find a complete list of all improvements by choosing Help > Release Notes inside the application. We recommend this update to all users of DEVONthink for Mac. Get it by using the application’s update function or from our Download page. The New & Improved page also highlights what’s new in each feature release.
* We name this release after the Cassini lunar crater and its namesake, Giovanni Domenico Cassini (1625–1712). The Italian-French astronomer served as the first director of the Paris Observatory. Cassini was a methodical observer and organizer of knowledge, systematically cataloging celestial phenomena and discovering four of Saturn’s moons and the division in its rings. His dedication to precise observation and documentation lives on as one of the foundational principles of science.