Has anyone heard or seen any publisized information on CMS supporting Apple's new macOS 10.13 High Seirra?
I don't see any mention of 10.13 in the support matrix. Unless there is another document, it maybe best to reach out to Symantec or your pre-sales engineer directly.
10.13 support is in the release notes for 8.1 RU4 with known limitations listed in this HOWTO
Hope this helps!