Regarding the latest version of mac OS 10.13 High Sierra, we currently confirmed a random crash issue happens upon starting Marmalade Hub.
This crash is related to 3rd party library we uses, which is not compatible with High Sierra.
We found many other developers are facing similar issue, and it seems we have to wait for the library to fix it.
We are still investigating if there’s ways for quick around, but it doesn’t seems to be easy.
For the mean time, we would suggest all developers to stay at Sierra until we can solve it.