I am using CC 2018 and it is up to date. Illustrator randomly quits when saving file. When I hit command + s, Adobe will randomly quit. Has done it twice today. A few more times the last few days.
Are you by any chance saving it a network share over macOS 10.13?
Please get in touch with us at any of the other support channels – https://helpx.adobe.com/support.html . Since this is not a generic issue that we can reproduce at our end, we will need someone to look into your machine to figure out what is going on here.
Ashutosh Chaturvedi | Sr. Quality Engineering Manager – Illustrator
Yes I am saving to a network and running MacOS 10.13.3