Mojave is a supported operating system since Illustrator version 23.×.
We request your help. 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.
An error occurred while saving the commentRACHEL ALSBURY commented
Finding the new CC2019 extremely slow compared to previous version. Crashes frequently. Takes ages to open documents and ages to save. Adversely effecting my work considering unistalling and going back to previous version.