I sync my macros between three Macs, but I would like to keep one group (which exists on two of the three Macs) unsynced.
I.e. I would like to be able to change the macros in that group on one Mac without being changed on the other Mac.
How can I do this? - Many thanks for any help!
Don't think KM support selective syncing:
" 
WARNING: Syncing macros is an all or nothing affair, so any macros on the target Mac before you start syncing will be lost.
from [https://wiki.keyboardmaestro.com/manual/Macro_Syncing]
Duplicate the group. rename it. tick the box "disabled on this mac" of one of the groups. do it accordingly on the other mac(s)
Good thinking! Will ry it out. Thanks.