Malware that encrypts your personal files and demands payment for decryption keys.

Adobe offers a browser-based version of Illustrator (at select subscription tiers).

Self-contained, allowing it to run without modifying the host machine’s registry or library files.

Many modern Mac exploits target the keychain system or browser data. A compromised Illustrator DMG can silently install keyloggers to record your passwords, banking information, and personal credentials. 4. Lack of Official Updates and Support

Here is the "story" behind why this specific version and format are often sought after: 1. The Context: Adobe Illustrator 2021 (v25.4.1)

While the file adobeillustrator20212541dmg portable claims to offer a free, easy way to use Adobe Illustrator, it is a pirated, modified, and unverified binary. The risks of infecting your Mac with data-stealing malware, experiencing system instability, and facing legal issues far outweigh the benefit of avoiding the subscription fee. It is highly recommended to avoid downloading this file from untrusted sources.

: This is the most critical term. In legitimate software, a "portable" app is one that runs directly from a folder or USB drive without needing a formal installation process. However, because Adobe does not officially make portable versions of Illustrator for macOS, this indicates the software has been modified by a third party. The Appeal of "Portable" Software