We've released an update to the Max 7.3.4 Mac installers.
The only fix in this build is for Mac OS 10.13 High Sierra users of Max For Live. It fixes a problem related to copying over the required Max frameworks to the Live app bundle, which would prevent Max For Live devices to load in Live 9.
Again, this is only a Mac update, and we have not incremented the version. There is no need to update if you are on other Mac OSes, though this build is compatible with all supported Mac OSes.
Thanks for your patience as we tracked down a fix for this issue.