Many users on Catalina have reported lag, slow redrawing, or crashes. If you experience these, try the following fixes: How to Open Adobe Illustrator CS6 in Mac Catalina 28 Jul 2020 —
Running Adobe Illustrator on macOS 10.15 (Catalina) can be tricky because this version of macOS was the first to drop support for 32-bit applications . This means older versions of Illustrator, like , will not launch natively on Catalina. Compatibility and Installation To use Illustrator on Catalina, you generally need Illustrator 2020 (v24.x) or certain builds of Illustrator 2022 (v26.x) 2023 (v27.x) adobe illustrator macos catalina
Use to reset preferences if it crashes.