macOS High Sierra support in Acronis True Image

Acronis True Image 2018
Acronis True Image 2018 supports High Sierra starting with build 9620. You can download the latest build in your Acronis account (if you need assistance downloading the build, see this article).

Acronis True Image 2017
Acronis True Image 2017 supports Sierra (10.12), but does not support High Sierra (10.13). Disk-level backup and bootable media creation might fail.
You can back up files and folders.