OBS (all versions) will crash during startup on Mojave. The problem is that there is a bug that disallows using an external boot-disk. Use an internal disk for boot-up & all is well. Too bad— I want to use an external SSD disk for boot-up & all storage because the internal SSD disk is too small. Avoiding use of the internal disk also makes backup easier. At the very least you should announce this limitation.
