Illustrator quits unexpectedly with no warning message. Event Viewer on Windows may show a fault module named ntdll.dll .

Why a maintenance release matters

When searching for specific file names like Adobe-Illustrator-2021-25.4.1.dmg online, caution is required.

To ensure your Adobe-Illustrator-2021-25.4.1.dmg is legitimate, follow this checklist:

Downloading installers from unverified sources poses serious security risks, including:

These flaws were discovered by security researcher and reported responsibly to Adobe. The vulnerabilities all share a similar root cause: improper bounds checking when decoding AutoCAD DWG files, which can be triggered simply by opening a maliciously crafted file. Attackers could exploit this to execute arbitrary code within Illustrator, potentially taking control of your system.

: Resolved critical issues related to legacy plugin compatibility and variable font rendering. 💻 System Requirements for macOS

: Enhances memory management for M1 Macs, preventing high RAM consumption during complex vector rendering.

: Approximately 4 GB of available hard-disk space for installation.

Designers gained the ability to align text vertically within a bounding box (top, bottom, center, or justified), eliminating the need for manual baseline shifting or empty paragraph spaces. Technical Specifications & System Requirements

Double-clicking the Adobe-Illustrator-2021-25.4.1.dmg file mounts it as a virtual disk on the desktop.

With Illustrator 2024 and 2025 available, why would any professional still use version 25.4.1? Several legitimate scenarios exist:

: 1024 x 768 display resolution (1920 x 1080 recommended). ⚠️ Important Safety and Licensing Notice