Adobe now offers a browser-based version of Illustrator that requires no DMG or installation. Adobe Express:
A "portable" application typically runs from a USB drive without installation, leaving no traces on the host computer. For complex software like Illustrator, this is technically infeasible for several reasons: adobeillustrator20212541dmg portable
which allows for easy installation and management on verified devices. Version 25.4.1 Highlights Adobe now offers a browser-based version of Illustrator