So far it is a delight to use RM7 with macOS Mohave beta after the constant lockups under High Sierra. I seldom have the lockups under macOS Mohave and I feel productive again.
The usual warning error pops up at the beginning after RM7 is installed regarding the program being a 32-bit app and not a 64 bit app and that future versions will more than likely not work on the Mac and to contact the software developers to ask for the 64-bit version.
I am so looking forward for RM8 to be released for the Mac. But at least by moving to macOS Mohave, many of the issues we have tolerated under High Sierra seem to have evaporated.