Adobe-illustrator-cc-2018-v22-1-0-312-macosx-2-2gb-2022

If you are using a Mac with an Apple Silicon (M1/M2/M3) chip , this 2018 version is not natively supported. It may run via Rosetta 2, but you will likely experience significant lag or crashes.

This is usually a macOS security feature. You can often fix this by opening Terminal and typing sudo xattr -rd com.apple.quarantine /Applications/Adobe\ Illustrator\ CC\ 2018/Adobe\ Illustrator.app . adobe-illustrator-cc-2018-v22-1-0-312-macosx-2-2gb-2022

It looks like you’re looking for a guide on how to handle a specific installation package for for macOS. If you are using a Mac with an