Adobe-illustrator-2021-25.4.1.dmg [better] Link

The dialog box popped up, then vanished. Then, the Finder window opened. Inside the DMG was the usual icon: the square brown box with the two unfolding flaps, the ubiquitous "Ai" abbreviation stamped in the corner. But something was off. The icon wasn't the usual crisp vector art; it looked… heavy. Textured. Like it had weight.

He sat back, the adrenaline fading, leaving him hollow and exhausted. He looked at the Application icon in the dock. The little orange "Ai" stared back at him, innocuous and patient. Adobe-Illustrator-2021-25.4.1.dmg

Your macOS is too old. Solution: Upgrade to Catalina, Big Sur, or use a newer Illustrator version. The dialog box popped up, then vanished

Preparing to copy 2.4 GB…

: Older Macs running macOS Catalina cannot run newer releases of Illustrator. The 25.4.1 version is often the most stable release available for these machines. But something was off

You can now easily apply 3D effects like Rotate, Revolve, Extrude, Lighting, and Shadows to vector artwork and create 3D graphics. Adobe Help Center