
The easiest option, if your hardware can handle it, would be to update your operating system from High Sierra to Monterey or Big Sur or Catalina. Either way, the production volume stays on the old system that is known to work. Current Adobe software only supports the last 3 Apple operating systems: Catalina, Big Sur and Monterey. I'll either find a spare hard drive and install the new system on that, or partition my Mac drive into two volumes so that the new release can be tested on the second volume. There are times when I do need to document or test the new OS even though my production Mac isn't on it yet. Those who can't wait don't have to upgrade their production system. During that 6 months I keep an eye on ongoing issues that I don't want to deal with (with both Apple and non-Apple software), and by the time those issues get fixed macOS is usually about at its 10.1x.3 or. Illustrator and InDesign have not been updated for High Sierra and there are some incompatibility issues that prevent the apps from working properly. Make sure the system meets the Illustrator system requirements. Adobe this week recommended customers using its Illustrator and InDesign software hold off from updating to the new macOS High Sierra operating system.

Need to know if Adobe Illustrator is compatible with my Intel Graphics device. I seem to average about 6 months or so after a new macOS comes out before I actually switch my production Mac over to it. Access Adobe Illustrator's website to know more about the compatibility of the software with the Intel Graphics.

If you cannot wait (for whatever reason), be sure to make a Time Machine (or other) backup of your current stable system, in case you run into problems. Personally I would wait untill the OS has been proven stable and your applications work as expected.
